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Microwave Theory and Techniques, IEEE Transactions on

Issue 3 • Date March 1989

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Displaying Results 1 - 25 of 33
  • Comments on "Attenuation measurement of very low loss dielectric waveguides by the cavity resonator method applicable in the millimeter/submillimeter wavelength range" by F.I. Shimabukuro

    Publication Year: 1989 , Page(s): 650 - 651
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (153 KB)  

    Three issues relating to a previously published paper (see ibid., vol.36, no.7, p.1160-6, 1988) are raised: (1) the lack of a reference to a previous work; (2) the fact that commonly used expressions of Q can be inaccurate, and (3) difficulties in using the cavity technique for attenuation measurements at frequencies greater at 70 GHz and above.<> View full abstract»

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  • Analysis of the oscillation conditions in distributed amplifiers

    Publication Year: 1989 , Page(s): 637 - 640
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (328 KB)  

    It has been shown that under certain conditions oscillation phenomena can occur in distributed amplifiers. It has also been demonstrated, using a simplified transistor model and a symmetrical amplifier with lumped circuit elements, that the oscillation depends directly on the transconductance gm of the active devices. The origin of this oscillation was found to be the loop formed in the distributed amplifier structure. The analysis has been experimentally verified in a practical 1-20-GHz monolithic MESFET amplifier. Finally, design guidelines have been established to avoid stability problems and to improve the capabilities of high-gain distributed amplifiers View full abstract»

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  • Deterministic approach to full-wave analysis of discontinuities in MICs using the method of lines

    Publication Year: 1989 , Page(s): 606 - 611
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (456 KB)  

    Arbitrarily shaped one-port and in-line two-port discontinuities in any quasiplanar configuration can be analyzed by this one-step method. Using the hybrid homogeneous conditions, this approach simplifies the calculation, with Ψe and Ψh being discretized only in and near the discontinuity regions. Illustrative examples of S-parameter calculation are given. Computed results are compared with measured data and with the published results of other authors View full abstract»

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  • Multimode network description of a planar periodic metal-strip grating at a dielectric interface. I. Rigorous network formulations

    Publication Year: 1989 , Page(s): 534 - 541
    Cited by:  Papers (41)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (616 KB)  

    The problem of a plane wave incident at an arbitrary angle on a metal strip grating of arbitrary period located at an air-dielectric interface is formulated rigorously in terms of a pair of static integral equations, from which equivalent multimode network descriptions are derived. Both aperture and obstacle approaches are treated, and both TE and TM polarizations are considered explicitly View full abstract»

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  • A GaAs monolithic 6 GHz low-noise amplifier for satellite receivers

    Publication Year: 1989 , Page(s): 565 - 570
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (516 KB)  

    A design approach and accurate modeling techniques developed to realize a GaAs monolithic, 6-GHz, two-stage, low-noise amplifier (LNA) with a measured 1.7 dB noise figure and associated 21 dB gain are discussed. This self-biased LNA design, with chip dimensions of 80 mil×135 mil, utilizes an ion-implantation FET model which predicts measured in-band amplifier gain to within 0.5 dB and peak frequency response to within 4%. The derived noise parameter estimation process, which uses a Gaussian elimination technique to predict the measured noise figure to within 0.2 dB, reduces a set of complex, binomial equations to simple relationships which are easily programmable. A deep-recessed gate realization of this LNA design demonstrates that LNA low-noise performance is achievable under FET saturated drain current conditions View full abstract»

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  • Lower bound on the eigenvalues of the characteristic equation for an arbitrary multilayered gyromagnetic structure with perpendicular magnetization

    Publication Year: 1989 , Page(s): 640 - 643
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (300 KB)  

    A layered gyromagnetic waveguiding structure magnetized perpendicularly to interfaces between layers is analyzed. The lower bound on the eigenvalues of the wave equation for this structure is derived using the spectral theory of linear operators. The elements of the transfer matrix for a layer of a gyromagnetic medium are given. A numerical example confirming the validity of the theoretical results is included View full abstract»

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  • Modeling of picosecond pulse propagation in microstrip interconnections of integrated circuits

    Publication Year: 1989 , Page(s): 469 - 478
    Cited by:  Papers (26)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (692 KB)  

    Theoretical time-domain analyses of the dispersion and loss of square-wave and exponential pulses on microstrip transmission line interconnections on silicon integrated-circuit substrates, performed using the quasi-TEM approximation, are discussed. Geometric dispersion and conductor line width, as well as losses from conductor resistance, conductor skin effect, and substrate conductance, are considered over the frequency range from 100 MHz to 100 GHz. Results show the enormous significance of the substrate losses and demonstrate the need for substrate resistivities >10 Ω-cm for high-performance circuits. The results also show the effects of geometric dispersion for frequencies above 10 GHz, the unimportance of conductor skin-effect losses for frequencies up to 100 GHz, and the transition from a high-frequency regime where losses do not affect phase velocity to a low-frequency regime where the ratio of he conductor and substrate loss coefficients determines phase velocity View full abstract»

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  • Field solution and propagation characteristics of monofilar-bifilar modes of axially slotted coaxial cable

    Publication Year: 1989 , Page(s): 553 - 557
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (348 KB)  

    The electromagnetic problem of an infinite, axially slotted coaxial cable is solved. The monofilar and bifilar eigenmodes are obtained with good accuracy and previous conflicting results are discussed. Further, a field solution satisfying the proper boundary conditions is obtained and shown to be essentially azimuthal View full abstract»

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  • Printed circuit antennas with integrated FET detectors for millimeter-wave quasi optics

    Publication Year: 1989 , Page(s): 593 - 597
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (424 KB)  

    Planar twin dipole microstrip antennas with integrated FET detectors which provide antenna patterns suitable for millimeter-wave quasioptical applications are discussed. The circuits are suitable for use as individual elements of an imaging array. A 63-GHz heterodyne mixer using such a circuit produced a system noise temperature of 7900 K View full abstract»

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  • Modeling of multiconductor buses and analysis of crosstalk, propagation delay and pulse distortion in high speed GaAs logic circuits

    Publication Year: 1989 , Page(s): 445 - 456
    Cited by:  Papers (26)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1012 KB)  

    Crosstalk, propagation delay, pulse distortion in multiconductor buses for high-speed GaAs logic circuits are analyzed. A simple but accurate quasi-TEM model of the bus is developed, and a critical analysis is carried out both on the accuracy of different approximate lumped and distributed models and on the impact of such approximations on the time-domain response. Results on the behavior of multiconductor buses in the presence of realistic input waveforms, are presented and design criteria are obtained View full abstract»

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  • Multimode network description of a planar periodic metal-strip grating at a dielectric interface-II: small-aperture and small-obstacle solutions

    Publication Year: 1989 , Page(s): 542 - 552
    Cited by:  Papers (18)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (752 KB)  

    For pt.I see ibid., vol.37, no.3, p.534-41 (1989). Two analytical small-argument solution procedures for integral equations are presented. Explicit expressions for the elements of the coupling matrices in the small-aperture and small-obstacle ranges are derived for both TE and TM polarizations. Simple and useful equivalent network descriptions in which all of the network elements are in very simple analytical form are derived. When the discontinuity is electrically small, the resulting network becomes dramatically simple. The various networks, together with estimates for their ranges of applicability, are discussed. Finally, numerical comparisons with an independent numerical reference solution are presented. These show that the simple networks are indeed very accurate within their ranges of applicability View full abstract»

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  • Effects of gain compression, bias conditions, and temperature on the flicker phase noise of an 8.5 GHz GaAs MESFET amplifier

    Publication Year: 1989 , Page(s): 643 - 646
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (376 KB)  

    The authors have measured the phase noise of an 8.5-GHz GaAs MESFET amplifier at temperatures from 1.7 K to 300 K for input powers from -30 dBm to well past the 1-dB gain compression point and for sideband frequencies from 0.1 Hz to 25 kHz. The observed flicker phase noise was independent of input power, even at levels producing 4 dB of gain compression, and also changed very little with bias conditions. The intrinsic phase noise at temperatures below 2.17 K was slightly higher than that observed at room temperature. However, no sign of the dramatic increase in flicker phase noise at low temperatures recently reported at 9.7 GHz was observed. Based on this data, it is predicted that a cryogenic loop oscillator built from such an amplifier should have exceptionally good short-term frequency stability View full abstract»

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  • A generalized theory for asymmetrical coupled lines

    Publication Year: 1989 , Page(s): 622 - 624
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (232 KB)  

    A method that calculates the properties of geometrically or electromagnetically asymmetrical coupled lines is discussed. Analogous to the normally used theory of even and odd modes, the electromagnetic fields on the computer are described in terms of two modes as the basic variables to calculate the coupling behavior. As a criterion for determining the amplitudes of the two modes, the power transported on the two guides is used. An image guide coupler with a ferrite slab theoretically demonstrates the feasibility of this method View full abstract»

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  • A multi-IMPATT injection-locked oscillator at 35 GHz

    Publication Year: 1989 , Page(s): 571 - 579
    Cited by:  Papers (2)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (696 KB)  

    A 35-GHz solid-state injection-locked oscillator giving 38 W peak power with 30% duty cycle is described. The power source utilizes a total of ten GaAs IMPATT (impact avalanche and transit time) diodes grouped in two stages. The performance of the source as well as the systematic design and measurement procedures used to develop the multidiode cavities used are discussed View full abstract»

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  • A simple broad-band device de-embedding method using an automatic network analyzer with time-domain option

    Publication Year: 1989 , Page(s): 479 - 483
    Cited by:  Papers (29)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (344 KB)  

    A simple method for de-embedding S parameters of devices in microstrip is presented. The use of only one transmission line and two nonideal shorts or opens of different lengths as calibration standards allows the determination of the unknown S parameters of the connectors and the complex propagation coefficient of the lines View full abstract»

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  • Accurate characterization of microstrip resonator open end with new current expression in spectral-domain approach

    Publication Year: 1989 , Page(s): 630 - 633
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (324 KB)  

    A resonant-frequency characterization of microstrip resonators which is suitable for very accurate computer-aided design is described. The convergence behavior of the numerical computation based on the spectral-domain approach is discussed to secure the convergence accuracy. To reduce computation time, which at present may amount to several hours, a current expression in the spectral-domain approach is proposed. The computational results under a good convergence have excellent agreement with those measured after estimation of a suitable dielectric constant View full abstract»

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  • Generalized spectral analysis of planar lines on layered media including uniaxial and biaxial dielectric substrates

    Publication Year: 1989 , Page(s): 504 - 511
    Cited by:  Papers (22)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (612 KB)  

    The spectral-domain analysis is generalized to compute the dispersive properties of a wide variety of planar and quasiplanar transmission lines (microstrips and finlines) printed on a stratified dielectric medium. Uniaxial and biaxial dielectric anisotropy can be easily manipulated due to the definition of a transverse propagation matrix characterizing each dielectric layer. The whole boundary value problem is reduced to two simpler problems involving only one or two dielectrics, and the spectral dyadic Green's function is derived by a recurrence algorithm. The dispersion equation is derived by using the Ritz-Galerkin method. The numerical convergence is substantially improved taking into account the asymptotic behavior of the series. A number of illustrative examples are included to emphasize the power of the method View full abstract»

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  • Large-signal computer-aided analysis and design of silicon bipolar MMIC oscillators and self-oscillating mixers

    Publication Year: 1989 , Page(s): 558 - 564
    Cited by:  Papers (22)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (596 KB)  

    A large-signal analysis and design of silicon bipolar monolithic microwave integrated circuit (MMIC) feedback oscillators and self-oscillating mixers are discussed. Emphasis is placed on the modeling of the active and passive devices and the large-signal analysis and design of nonlinear circuits using SPICE. Measured and simulated data of a C-band self-oscillating mixer are presented View full abstract»

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  • An accurate measurement technique for line properties, junction effects, and dielectric and magnetic material parameters

    Publication Year: 1989 , Page(s): 598 - 605
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (704 KB)  

    Transmission/reflection coefficients of unknown transmission lines are analyzed. The characteristic impedance, the propagation constant, and the parameters of the junctions at the connections with the measurement setup can be calculated if the coefficients of three different lengths of the line being investigated are measured. Therefore it is called the L3 method (line/line/line). Transmission data suffice for the determination of only the propagation constant. They are used in the case of material parameter measurements with loaded lines. Dielectric and magnetic properties of the filling material are calculated using the set of transverse resonance equations View full abstract»

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  • Physical modeling of GaAs MESFETs in an integrated CAD environment: from device technology to microwave circuit performance

    Publication Year: 1989 , Page(s): 457 - 468
    Cited by:  Papers (22)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1016 KB)  

    The linkage between a physical device simulator for small- and large-signal characterization and CAD (computer-aided design) tools for both linear and nonlinear circuit analysis and design is considered. Efficient techniques for the physical DC and small-signal analysis of MESFETs are presented. The problem of physical simulation in a circuit environment is discussed, and it is shown how such a simulation makes possible small-signal models accounting for propagation and external parasitics. Efficient solutions for physical large-signal simulation, based on deriving large-signal equivalent circuits from small-signal analyses under different bias conditions, are proposed. The small- and large-signal characterizations allow physical simulation to be performed efficiently in a circuit environment. Examples and results are presented View full abstract»

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  • Effect of a cochannel signal on the electrical tuning characteristics of a Gunn oscillator

    Publication Year: 1989 , Page(s): 627 - 630
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (292 KB)  

    Experimental observations on the pull-in as well as hold-in characteristics of an injection-lock microwave (Gunn) oscillator in the presence of a cochannel signal are reported. An analytical treatment which confirms the observations is presented View full abstract»

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  • A novel cavity resonator measurement method for leaky waveguides

    Publication Year: 1989 , Page(s): 618 - 621
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (360 KB)  

    The authors present a method for measuring the phase and leakage constants of leaky waveguides in which power is sent in transversely, in a reversal of the leakage process itself. The cavity therefore requires no coupling holes, and the method is accurate and convenient to use, as shown in an illustrative example View full abstract»

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  • Variational method for multiconductor coupled striplines with stratified anisotropic media

    Publication Year: 1989 , Page(s): 484 - 491
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (528 KB)  

    Numerical examples are presented for the propagation constants as well as the characteristic impedances of various types of multicoupled striplines. Numerical computations are performed very accurately to provide sufficient precision even for tight coupling between strips of the multiconductor system. The basis functions used in the calculation are increased up to ten. Accurate numerical results reveal the mode coupling in the multimode propagation View full abstract»

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  • A cylindrical multiconductor stripline-like microstrip transmission line

    Publication Year: 1989 , Page(s): 497 - 503
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (420 KB)  

    An analytical expression for the Maxwell capacitance matrix of a class of cylindrical inhomogeneous, multiconductor transmission lines is provided. This class includes cylindrical structures symmetrical with respect to the circuit circle and having a symmetry axis. The effective dielectric constant of the line is found to be the arithmetical mean of the dielectric constants of the two media. Hence, this structure enjoys the main advances of the planar stripline-like microstrip systems. It is also pointed out how to obtain elliptical stripline-like microstrip transmission lines View full abstract»

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  • An 85-116 GHz SIS receiver using inductively shunted edge junctions

    Publication Year: 1989 , Page(s): 580 - 592
    Cited by:  Papers (30)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1276 KB)  

    A superconductor-insulator-superconductor (SIS) mixer with a broadband integrated tuning structure is described. The mixer is tunable from 85 to 116 GHz and at 114 GHz has a noise temperature ⩽5.6 K double sideband (DSB) and unity DSB conversion gain. The mixer noise temperature is less than or comparable to the photon noise temperature hf/k≈5.5 K. Referred to the mixer input flange, the receiver noise temperature is ⩽9.5 K DSB when operated with an L -band HEMT (high-electron-mobility transistor) IF amplifier. Saturation measurements have been made using CW and broadband noise sources View full abstract»

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The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design..

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