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IRE Transactions on Microwave Theory and Techniques

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  • 1. An N-Way Hybrid Power Divider

    Publication Year: 1960, Page(s):116 - 118
    Cited by:  Papers (409)  |  Patents (45)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (459 KB)

    A circularly symmetric power divider is described which splits a signal into n equiphase equiamplitude parts where n can be odd or even. The power divider provides isolation between output terminals and approximately matched terminal impedances over about a 20 per cent band. A theory of operation is given which yields the necessary design parameters, and an experimental model is described which ha... View full abstract»

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  • 2. Parallel-Coupled Transmission-Line-Resonator Filters

    Publication Year: 1958, Page(s):223 - 231
    Cited by:  Papers (357)  |  Patents (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (900 KB)

    This paper describes the synthesis of band-pass transmission-line filters consisting of series of half-wavelength resonant conductors such as strips. The design differs from the usual end-coupled strip configuration in that successive strips are parallel coupled along a distance of a quarter-wavelength. The resulting coupling between resonators is partly electric and partly magnetic. Several impor... View full abstract»

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  • 3. A New Class of Broad-Band Microwave 90-Degree Phase Shifters

    Publication Year: 1958, Page(s):232 - 237
    Cited by:  Papers (221)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (507 KB)

    In the type of circuits considered here, the input power is divided equally between two channels whose outputs are caused to have a very nearly 90° phase difference over a broad frequency range. Networks suitable for application at low frequencies which perform the above function have been widely investigated. This report describes a new type of 90° differential phase shifter which has a... View full abstract»

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  • 4. Coupled-Strip-Transmission-Line Filters and Directional Couplers

    Publication Year: 1956, Page(s):75 - 81
    Cited by:  Papers (262)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    This paper describes the theory of operation of coupled strip line tilt ers and directional couplers, and presents information from which these components may be easily designed. Low-pass, band-pass, all-pass, and all-stop filter characteristics are obtained from these coupled lines either by placing open or short circuits at two of the four available terminal pairs, or by interconnecting two of t... View full abstract»

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  • 5. Shielded Coupled-Strip Transmission Line

    Publication Year: 1955, Page(s):29 - 38
    Cited by:  Papers (160)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (724 KB)

    An analysis is made of the odd and even TEM modes on a pair of parallel co-planar strips midway between ground planes. Rigorous formulas are presented for the case of zero-thickness strips, while approximate formulas are given for strips of finite thickness and for strips printed on opposite sides of a thin dielectric sheet supported in air between ground planes (AIL construction). The characteris... View full abstract»

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  • 6. A Dielectric Resonator Method of Measuring Inductive Capacities in the Millimeter Range

    Publication Year: 1960, Page(s):402 - 410
    Cited by:  Papers (237)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (827 KB)

    A novel technique for the measurement of dielectric and magnetic properties of a homogeneous isotropic medium in the range of approximately 3 to 100 kmc is described. An accuracy of /l.chemc/ 1 per cent is possible in the determination of permittivity or permeability in those cases where the loss tangent is sulliciently small. The measuring structure is a resonator made up of a right circular cynd... View full abstract»

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  • 7. A Method of Analysis of Symmetrical Four-Port Networks

    Publication Year: 1956, Page(s):246 - 252
    Cited by:  Papers (296)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (538 KB)

    An analysis of four-arm symmetrical networks such as a branched directional double stub coupler or the hybrid ring (rat race) is presented. The input wave is broken into an even and an odd mode and the vector amplitude out the various arms is computed from the sums or differences of the reflection or transmission coefficients for the two modes. A zero decibel directional coupler is described and i... View full abstract»

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  • 8. Characteristic Impedances of Broadside-Coupled Strip Transmission Lines

    Publication Year: 1960, Page(s):633 - 637
    Cited by:  Papers (92)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Formulas are given for the even- and odd-mode characteristic impedances of shielded coupled strip-transmission-line configurations that are especially useful when close coupling is desired. Applications may be made to wideband coupled-strip-line filters, 3-db directional couplers, and many other components. The cross sections considered are thin broadside-coupled strips either parallel or perpendi... View full abstract»

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  • 9. Optimum Design of Stepped Transmission-Line Transformers

    Publication Year: 1955, Page(s):16 - 20
    Cited by:  Papers (103)  |  Patents (48)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (570 KB)

    This paper describes the optimum stepped-transmission-line transformer structure for matching two unequal characteristic impedances. For any specified bandwidth, the steps are designed to yield a Tchebycheff-type (or equal-ripple) reflection-coefficient response. Over this band, the maximum vswr is less than that obtainable with any other stepped-transformer having the same number of steps. Design... View full abstract»

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  • 10. The Design of Ridged Waveguides

    Publication Year: 1955, Page(s):20 - 29
    Cited by:  Papers (192)  |  Patents (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (921 KB)

    As far as we are aware, the only published design information on ridged guide transmission lines is found in a paper by S. B. Cohn and to some extent in the Waveguide Handbook. Recent applications, however, have indicated a need for additional and, in some cases, more accurate design information. The present paper is largely written with this in mind. View full abstract»

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  • 11. Interdigital Band-Pass Filters

    Publication Year: 1962, Page(s):479 - 491
    Cited by:  Papers (108)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1627 KB)

    The design of band-pass filters using interdigital arrays of resonator line elements between parallel ground planes is discussed. Two approximate design procedures are described, both of which permit design directly from lumped element, low-pass, prototype filters. Both design procedures will work for either narrow or wide-band filters, but one procedure gives more practical dimensions for filters... View full abstract»

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  • 12. Problems in Strip Transmission Lines

    Publication Year: 1955, Page(s):119 - 126
    Cited by:  Papers (120)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1068 KB)

    A review is given of characteristic-impedance formulas for shielded-strip transmission lines. From these formulas a set of approximate relationships for the attenuation and Q of a dielectric-filled shielded-strip transmission line is derived. The method makes the standard assumption that the current distribution is that of a lossless line and the surface resistivity that of an infinite-plane condu... View full abstract»

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  • 13. A New Type of Circular Polarizer Using Crossed Dipoles

    Publication Year: 1961, Page(s):385 - 388
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (315 KB)

    A method of obtaining a circularly-polaIized wave by use of two orthogonal dipoles driven in parallel by a common transmission line is shown. The lengths of the dipoles are so chosen that the real part of their input admittances are equal and the angle of the inpnt admittances differ by 90°. When these two conditions are met the resulting radiated wave in a normal direction will be circularly... View full abstract»

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  • 14. Rectangular and Ridge Waveguide

    Publication Year: 1956, Page(s):201 - 209
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1293 KB)

    This paper describes the present state of the art with respect to rectangular ridge waveguide giving tables and data from standard waveguide sizes and constructional techniques for both rigid and flexible waveguide. The problems inherent in waveguide connectors are discussed along with the various methods for producing waveguide assemblies. The problems inherent with present-day waveguide standard... View full abstract»

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  • 15. Reflectors for a Microwave Fabry-Perot Interferometer

    Publication Year: 1959, Page(s):221 - 228
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (836 KB)

    The advantages of microwave interferometers for wavelength and other measurements at millimeter wavelengths are indicated, and a microwave Fabry-Perot interferometer discussed in detail. Analogous to the cavity resonator, this requires reflectors of high reflectivity, small absorption, and adequate size. Stacked dielectric plates, and stacked planar or rod gratings are shown to be suitable forms o... View full abstract»

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  • 16. Microwave Engineering - Is It Specialization or Diversification?

    Publication Year: 1956, Page(s):66 - 67
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (210 KB)

    First Page of the Article
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  • 17. Propagation in Dielectric Slab Loaded Rectangular Waveguide

    Publication Year: 1958, Page(s):215 - 222
    Cited by:  Papers (69)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (717 KB)

    Propagation in dielectric loaded rectangular waveguide is investigated theoretically for varying slab thickness and dielectric constant. The slabs are placed across the center of the waveguide in the E plane. This geometry is found to offer bandwidths in excess of double that of rectangular waveguide for dielectrics having dielectric constants of approximately 18. Power handling capacities which a... View full abstract»

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  • 18. Stepped-Impedance Transformers and Filter Prototypes

    Publication Year: 1962, Page(s):339 - 359
    Cited by:  Papers (43)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1950 KB)

    Quarter-wave transformers are widely used to obtain an impedance match within a specified tolerance between two lines of different characteristic impedances over a specified frequency band. This paper gives design formulas and extensive tables of designs, most of which were especially derived so that an integrated account could be presented for the first time. Numerous examples are given. Only hom... View full abstract»

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  • 19. The Synthesis of Symmetrical Waveguide Circulators

    Publication Year: 1959, Page(s):238 - 246
    Cited by:  Papers (75)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (953 KB)

    A method for synthesizing symmetrical waveguide circulators by adjusting the eigenvalues of the scattering matrix is described. This procedure is particularly useful for the design of very compact circulators in the form of waveguide junctions containing ferrite obstacles. Permissible structural symmetries for a circulator are listed, and a standard form for the scattering matrix of a symmetrical ... View full abstract»

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  • 20. Rounded Corners in Microwave High-Power Filters and Other Components

    Publication Year: 1961, Page(s):389 - 397
    Cited by:  Papers (13)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (842 KB)

    Microwave high-power filters must be operated with internal air pressures of at least one atmosphere, or with a good vacuum. Pressures between these extremes result in reduced powerhandling ability. The breakdown processes for both high air pressure and vacuum are discussed, and it is made clear that any sharp corner on which the electric field would concentrate must be rounded if high-power opera... View full abstract»

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  • 21. The Use of Scattering Matrices in Microwave Circuits

    Publication Year: 1955, Page(s):21 - 26
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (626 KB)

    Difficulties arising from the use of the impedance concept in microwave circuitry have led to the introduction of the scattering representation for work at these frequencies. This paper presents a development of the scattering approach in terms of fundamental transmission-line phenomena. The physical meaning of the quantities involved is brought out wherever possible and the relationships among th... View full abstract»

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  • 22. A Y-Junction Strip-Line Circulator

    Publication Year: 1960, Page(s):346 - 351
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (543 KB)

    Summary--The theoretical approach to the three-port symmetrical circulator is reviewed and presented in a form valid for the most general waveguide case. A strip-line Y-junction circulator is described and the performance of different units in the band 800-1600 mc is illustrated. The new type of device described offers, for the low-frequency region of the microwave spectrum, advantages of simple d... View full abstract»

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  • 23. Open Wire Lines

    Publication Year: 1956, Page(s):197 - 200
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (471 KB)

    The properties of two-wire lines and single wire lines (surface wave transmission lines) are discussed on a comparative basis. The two-wire line is actually a system of two coupled single wire lines and thus requires a high degree of symmetry to maintain the desired wave mode. While the single wire line is more affected by bends it has the advantages that it is simpler in construction and is less ... View full abstract»

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  • 24. Hybrid-Ring Directional Coupler for Arbitrary Power Divisions

    Publication Year: 1961, Page(s):529 - 535
    Cited by:  Papers (60)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (447 KB)

    A directional coupler in the form of a hybrid ring is described in this paper. A theoretical analysis using the scattering matrix has been carried out and experimental verification of the theoretical result has been achieved in a stripline network. Simple design equations which enable one to design a directional coupler with any degree of coupling have been derived. This coupler differs from the c... View full abstract»

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  • 25. A Printed Circuit Balun for Use with Spiral Antennas

    Publication Year: 1960, Page(s):319 - 325
    Cited by:  Papers (41)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (908 KB)

    A novel printed circuit balun is described which is particularly well suited to applications where space is at a premium. The design utilizes unshielded strip transmission line, but is readily adaptable to all of the common printed circuit transmission line techniques. When the balun is housed within the cavity of a spiral antenna, boresight error is virtually eliminated, ellipticity ratios of les... View full abstract»

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  • 26. General Synthesis of Quarter-Wave Impedance Transformers

    Publication Year: 1957, Page(s):36 - 43
    Cited by:  Papers (108)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (819 KB)

    This paper presents the general synthesis of a radio frequency impedance transformer of n quarter-wave steps, given an "insertion loss function" of permissible form. This procedure parallels that of Darlington for lumped constant filters by providing the connection between Collin's canonical form for the insertion loss function and Richards' demonstration that a reactance function may always be re... View full abstract»

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  • 27. A Modulated Scattering Technique for Measurement of Field Distributions

    Publication Year: 1955, Page(s):13 - 15
    Cited by:  Papers (81)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (357 KB)

    Electric field distributions can be measured accurately by passing a short metal dipole through the field and recording the wave scattered by the dipole. Ordinarily the method is difficult to use since the scattered signal is small, critical tuning adjustments are required, and careful attention to stability is necessary. However, by placing a nonlinear impedance at the center of the dipole and ap... View full abstract»

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  • 28. Calculation of the Parameters of Ridge Waveguides

    Publication Year: 1957, Page(s):12 - 17
    Cited by:  Papers (30)  |  Patents (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (639 KB)

    In this paper an algebraic expression which constitutes an approximation to Cohn's transcendental equation is given for the determination of the dominant-mode cutoff wavelength of ridge waveguides. A modified derivation of Mihran's equation for calculating the characteristic impedance of ridge waveguides is discussed. Based upon these formulas, nomography are constructed to permit the determinatio... View full abstract»

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  • 29. Breaking through the Mental Barrier

    Publication Year: 1959, Page(s):190 - 191
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    Any of us whose work requires thinking will realize that the brain was not really meant for scientific effort. As to whether it is better suited to its more basic functions of guiding the individual is another fascinating subject that I will not consider here. Instead, I choose to pinpoint and attack a major inadequacy of the mind that interferes with our professional labors, and hope thereby, in ... View full abstract»

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  • 30. A Note on the Difference Between Equiangular and Archimedes Spiral Antennas (Correspondence)

    Publication Year: 1961, Page(s):203 - 205
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (334 KB)

    There seems to exist in the literature considerable confusion about the various types of spiral antennas, their characteristics, and their bandwidth capabilities. One evidence of this confusion appeared in a paper by Bower and Wolfe, in which they state that the Archimedes spiral antenna can be specified in terms of angles and hence belongs in the class of "frequency--independent antennas. "Freque... View full abstract»

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  • 31. Design of Wide-Band (and Narrow-Band) Band-Pass Microwave Filters on the Insertion Loss Basis

    Publication Year: 1960, Page(s):580 - 593
    Cited by:  Papers (54)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1731 KB)

    A method for design of band-pass microwave filters is described that combines the image and insertion-loss points of view to give an approximate design method having simplicity, but also high precision. This method is applicable for filter designs ranging from narrow to very wide bandwidths (2 to 1 or more). The desired insertion loss characteristic is obtained by use of a lumped-element, Tchebych... View full abstract»

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  • 32. Microwave Q Measurements in the Presence of Coupling Losses

    Publication Year: 1958, Page(s):383 - 389
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (630 KB)

    In the use of the impedance (Q-circle) method of measuring the cavity Q values, the presence of losses in the coupling network (between the cavity and the available external terminals) is usually neglected. If appreciable losses are present this simplification is not justitied, and its use can lead to significant errors. The losses in any coupling network can be described by means of an equivalent... View full abstract»

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  • 33. The Multiple Branch Waveguide Coupler

    Publication Year: 1958, Page(s):398 - 403
    Cited by:  Papers (35)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    A multiple branch directional coupler is discussed for rectangular waveguide applications for series junctions. A design method is developed which is valid for any coupling ratio and any number of branch lines with perfect match and directivity. The frequency response of this type coupler is calculated with the aid of a digital computer. View full abstract»

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  • 34. Tables for Cascaded Homogeneous Quarter-Wave Transformers

    Publication Year: 1959, Page(s):233 - 237
    Cited by:  Papers (66)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (451 KB)

    Quarter-wave transformers are frequently required in microwave and UHF systems. An exact design procedure is known but involves lengthy calculations. Faced with the design of many such transformers, the calculations were programmed on an IBM 704 digital computer. The speed of computation is such that several hundred designs for 2, 3, and 4 section transformers were systematically computed in a few... View full abstract»

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  • 35. Thickness Corrections for Capacitive Obstacles and Strip Conductors

    Publication Year: 1960, Page(s):638 - 644
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (582 KB)

    Capacitive thickness corrections are derived exactly for two basic geometries involving pairs of semi-infinite plates. In one arrangement the pair of plates are coplanar, while in the other they are parallel to each other. In each case the total capacitance per unit length between the pair of plates is infinite, but the incremental increase of capacitance when the thickness is increased from zero ... View full abstract»

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  • 36. Ridge Waveguide Field Description and Application to Directional Couplers

    Publication Year: 1962, Page(s):41 - 50
    Cited by:  Papers (37)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1299 KB)

    An approximate determination of the dominant-mode fields in ridge waveguides at all frequencies has been made. Evaluations of the fields along the walls of a commercially standard single-ridge guide having a usable frequency range from 3.75 to 15.0 Gc, and a commercially standard double-ridge guide having a usable frequency range from 4.7 to 11.0 Gc were carried out, and graphs drawn so that the r... View full abstract»

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  • 37. A Five-Port Matched Pseudo-Magic Tee

    Publication Year: 1961, Page(s):216 - 219
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    The five-port matched pseudo-magic tee consists of an input waveguide, two load arm waveguides which are coupled into the input waveguide with +90° and -90° phase shifts, respectively, and an output waveguide which is split into two load waveguides by a septum. The improvements include a much broader matching and isolation bandwidth, higher isolation between arms, better matching into ar... View full abstract»

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  • 38. Optimization of Waveguide Tapers Capable of Multimode Propagation

    Publication Year: 1961, Page(s):442 - 452
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (973 KB)

    By converting Maxwell's equations, the general case of mode conversion in tapered waveguides is treated by matrix formulation in terms of an infinite set of coupled differential equations with nonuniform coupling coefficients and varying phase constants. An "orthogonalization" or "diagonalization" process is introduced through a nonlinear matrix transformation which is a function of taper length. ... View full abstract»

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  • 39. Microwave Reflectometer Techniques

    Publication Year: 1959, Page(s):351 - 355
    Cited by:  Papers (57)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    A rigorous analysis of the microwave retlectometer is presented for what is believed to be the first time. By means of this analysis, the correct adjustment of auxiliary tuners is described, and the errors resulting from incorrect adjustments are treated in a quantitative manner. It is shown how the reflectometer technique may be further simplified while preserving the accuracy of measurement. A c... View full abstract»

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  • 40. Microwave Printed Circuits - A Historical Survey

    Publication Year: 1955, Page(s):1 - 9
    Cited by:  Papers (25)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1278 KB)

    The microwave printed circuit, as described in this paper, is an extension of the well-known technique which is of such importance in the lower frequency regions, where lumped element circuits are practical. This new circuit possesses all of the virtues of other printed circuits, such as light weight, cheapness, ease of manufacture, miniaturization, etc., along with the ability to be used at frequ... View full abstract»

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  • 41. Criteria for the Design of Loop-Type Directional Couplers for the L Band

    Publication Year: 1956, Page(s):234 - 239
    Cited by:  Papers (9)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (835 KB)

    For many years the design of loop type directional couplers has relied heavily on experiment. One of the most common varieties has been the loop coupler much shorter than a wavelength and having a built-in termination (vestigial arm). In this paper the criteria for the design of loop couplers of any length are considered, and their application to either coaxial line or waveguide are discussed. The... View full abstract»

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  • 42. A Wide-Band Balun

    Publication Year: 1958, Page(s):314 - 316
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    Experimental results are given for a transformer from an unbalanced 50-ohm coaxial line to a balanced pair of 50-ohm coaxial lines. The design is one proposed by Marchand. The balance, standing wave ratio, and insertion loss are nearly constant over a 13 to 1 frequency range from 650 mc to 8500 mc. The standing wave ratio is less than 2.1 to one and the insertion loss is about 0.5 db over this ban... View full abstract»

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  • 43. Determination of the Capacitance, Inductance, and Characteristic Impedance of Rectangular Lines

    Publication Year: 1960, Page(s):510 - 519
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (857 KB)

    This paper determines the capacitance, inductance, and characteristic impedance of rectangular lines by the method of conformal transformation. In practical applications, such lines may be used as transmission links of RF energy, as impedance-transforming sections, or as components in electron tubes. Formulas are given for the calculation of the parameters of rectangular lines having the following... View full abstract»

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  • 44. Circular Electric Mode Directional Coupler

    Publication Year: 1960, Page(s):660 - 666
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (695 KB)

    This paper describes a circular electric mode directional coupler, composed of two coaxial bifurcations in circular waveguide. The coupling coefficient of the directional coupler depends on the separation between the two bifurcations, and a hybrid junction for the circular electric mode may be obtained at the proper separation. The analysis is carried out in terms of scattering matrix elements cha... View full abstract»

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  • 45. The Expansions of Electromagnetic Fields in Cavities

    Publication Year: 1958, Page(s):178 - 187
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (713 KB)

    In the theory of cavity resonators, the assumptions are frequently made that every irrotational function can be represented as the gradient of a scalar and that every divergenceless function can be represented as the rotation of a vector. These are, however, not necessarily correct. This paper corrects these misleading assumptions and describes "the theory of cavity resonators" which supplement th... View full abstract»

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  • 46. A Broad-Band Microwave Circulator

    Publication Year: 1956, Page(s):210 - 217
    Cited by:  Papers (20)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (685 KB)

    The discovery of a simple, low loss way to hold Faraday rotation constant over a broad-band (coupled with the development of wide-band, high return loss, circular-to-rectangular waveguide transformers, and polarization couplers) has made it possible to design and build a high quality circulator for use in the 10.7 kmc to 11.7 kmc band. The essential characteristics of the described unit include a ... View full abstract»

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  • 47. Passive Phase-Distortionless Parametric Limiting with Varactor Diodes

    Publication Year: 1961, Page(s):459 - 472
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1920 KB)

    The theory of passive parametric limiting with a varactor diode as the nonlinear element is developed and verified experimentally. The limiting is found to be flat and phase-distortionless. Expressions are given for threshold level, dynamic range, bandwidth, and power dissipation. The transient phenomena, comprising leading- and trailing-edge leakage spikes, are studied theoretically and experimen... View full abstract»

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  • 48. The Excitation of Surface Waveguides and Radiating Slots by Strip-Circuit Transmission Lines

    Publication Year: 1956, Page(s):218 - 222
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB)

    A variety of methods for coupling between a shielded strip-circuit transmission line, operating in the TEM coaxial mode, and a surface waveguide have been investigated. The arrangements include phased dipole arrays, series ground-plane slots and Iongitudinal slot excited probes. Impedance and matching conditions for each are discussed together with their relative efficiency and bandwidth. In the c... View full abstract»

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  • 49. Microwave Band-Stop Filters with Narrow Stop Bands

    Publication Year: 1962, Page(s):416 - 427
    Cited by:  Papers (1)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1200 KB)

    Band-stop filters can be used to eliminate a band of frequencies, or to separate such a band from other frequencies; if properly designed, the insertion loss at frequencies outside the stop-band can be minimized. The filters considered here have stop-band bandwidths up to a few per cent, and equiripple or maximally flat characteristics in the passband. Design formulas are presented. The effect of ... View full abstract»

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  • 50. A Variable-Ratio Microwave Power Divider and Multiplexer

    Publication Year: 1957, Page(s):227 - 229
    Cited by:  Papers (7)  |  Patents (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (497 KB)

    A microwave circuit is presented which provides continuous variation of microwave power between two outputs in any desired ratio. A typical device utilizing the circuit is described, and other uses of the circuit are discussed. An X-band power divider was constructed which had a vswr of less than 1.2 at all times over the frequency range of 8.6 to 9.6 kmc, divided the total input energy between th... View full abstract»

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Aims & Scope

This Transactions ceased publication in 1962. The current retitled publication is IEEE Transactions on Microwave Theory and Techniques.

Full Aims & Scope