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IEEE Transactions on Microwave Theory and Techniques

Issue 9 • Date Sept 1987

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Displaying Results 1 - 18 of 18
  • [Front cover - Sep. 1987 [T-MTT]]

    Publication Year: 1987, Page(s):f1 - f2
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    Freely Available from IEEE
  • Patent abstracts

    Publication Year: 1987, Page(s):875 - 879
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (381 KB)

    These patent abstracts of recently issued patents of interest to microwave engineers are intended to provide the minimum information necessary for readers to detennine if they are interested in examining the patent in more detail. Complete copies of patents are available for a small fee by writing: U.S. Patent and Trademark Office, Box 9, Washington, DC, USA. View full abstract»

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  • [Advertisement]

    Publication Year: 1987, Page(s): 880
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    Freely Available from IEEE
  • [Back cover - Sep. 1987 [T-MTT]]

    Publication Year: 1987, Page(s):b1 - b2
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    Freely Available from IEEE
  • Indefinite Integrals Useful in the Analysis of Cylindrical Dielectric Resonators (Letters)

    Publication Year: 1987, Page(s):873 - 874
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB)

    Little-known integrals are listed, useful for the evacuation of stored electric energy in cylindrical regions, such as often appear in the analysis of cylindrical dielectric resonators. View full abstract»

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  • On the Relationship Between TLM and Finite-Difference Methods for Maxwell's Equations (Comments)

    Publication Year: 1987, Page(s):872 - 873
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    In the above paper, Mr. Johns compares the finite-difference time-domain (FD-TD) and transmission-line matrix (TLM) methods and concludes that: In the three-dimensional TLM method operated in the above way, there are three field quantities available at each shunt and series node, This, for example, allows the boundary description for TLM to be twice as fine as for finite differences. In two dimens... View full abstract»

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  • A New Constant-Resistance ASK Modulator Using Double-Sided MIC

    Publication Year: 1987, Page(s):819 - 822
    Cited by:  Papers (13)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    A new constant-resistance ASK modulator using double-sided MIC techniques is proposed. (The term "double-sided MIC" refers to a circuit that utilizes both substrate surfaces.) The circuit consists of two quarter-wavelength slotlines, two variable-resistance elements, and a slot-to-microstrip transition. A balanced circuit configuration is used to obtain a high ON/OFF ratio at high frequencies. The... View full abstract»

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  • Cryogenic Operation of a Monolithic Slow-Wave Variable Phase Shifter (Short Paper)

    Publication Year: 1987, Page(s):868 - 871
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    A GaAs slow-wave variable phase shifter has been investigated at 4.2, 77, and 300 K ambient temperatures over the 2-18-GHz frequency range. Differential phase shift Delta Theta has been measured and presented as a set of curves parameterized in terms of temperature covering the entire frequency range. Analytical explanations are provided for the phase shift Theta and insertion loss L behavior as f... View full abstract»

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  • Bias-Tuned Injection-Locked Discriminators

    Publication Year: 1987, Page(s):812 - 818
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    A new form of microwave FM discriminator using simultaneously the technique of injection synchronization and automatic bias tuning has been proposed. The present discriminator basically consists of an injection-synchronized Gunn oscillator and an arrangement for bias tuning of the oscillator in correspondence to a measure of the instantaneous phase/frequency error between the incoming signal and t... View full abstract»

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  • Effective Impedance of a Load Filling a Circumferential Slot in a Coaxial Transmission Line (Short Paper)

    Publication Year: 1987, Page(s):862 - 865
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    A terminal load uniformly filling a narrow slot placed in the outer conductor of a coaxial transmission line presents a certain effective impedance to TEM waves propagating in the line. The relationship between this value of impedance and the voltage-to-current ratio at this load is established. The two are not necessarily equal. A numerical example is considered. View full abstract»

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  • Complex Gyrator Circuit of an Evanescent-Mode E-Plane Junction Circulator Using H-Plane Turnstile Resonators

    Publication Year: 1987, Page(s):797 - 806
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1088 KB)

    The E-plane circulator is of considerable practical interest but its development has lagged somewhat compared to that of the more common H-plane device. The purpose of this paper is to experimentally investigate the eigenvalue problem and the complex gyrator circuit of an E-plane evanescent-mode junction loaded with one or two H-plane turnstile ferrite resonators symmetrically coupled by three sta... View full abstract»

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  • Rigorous Analysis and Network Modeling of the Inset Dielectric Guide

    Publication Year: 1987, Page(s):823 - 834
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB)

    The inset dielectric guide (IDG) is an easy-to-fabticate alternative to image line and is also less sensitive to loss by radiation at discontinuities. This paper presents a rigorous variational analysis in space domain based on field and network considerations (transverse resonance diffraction). This approach yields an accurate transverse equivalent network for the fundamental mode suitable for ev... View full abstract»

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  • Depth of Penetration of Fields from Rectangular Apertures Into Lossy Media (Short Paper)

    Publication Year: 1987, Page(s):865 - 867
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    A widely used device for biomedical applications of microwave energy is the dielectric-loaded waveguide operating in the TE10 mode. We have calculated the (1/e) energy penetration depth from such antennas, modeled as rectangular apertures radiating into a lossy medium with dielectric properties resembling those of tissue. The results are presented in nondimensional form from which the c... View full abstract»

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  • Sidelobe Suppression in Low and High Time-Bandwidth Products of Linear FM Pulse Compression Filters

    Publication Year: 1987, Page(s):807 - 811
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    The peak sidelobe suppression of unweighed linear FM surface acoustic wave filters limits the dynamic range of pulse compression systems. Using a discrete inverse Fourier transform "sampling technique" and complex Fresnel integral algorithms, this paper extends previous results of other authors from a time-bandwidth product of 50 up to the high value of 720. In the present work, the weighting is a... View full abstract»

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  • TM0n0 - and TMm10 - Mode Oversized Cylindrical Cavity Power Combiners

    Publication Year: 1987, Page(s):835 - 842
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    TMm10 -mode power combining is treated in addition to conventional TM0n0-mode combining in a multiple-device oversized cylindrical cavity having a window output structure. Mode analysis gives the condition for stable power-combining operation in the desired mode. By experiments both on TM0n0 -mode combining (n = 2, 3, and 4) and on TMm10 -mode combining ... View full abstract»

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  • Cylindrical Substrate Microstrip Line Characterization

    Publication Year: 1987, Page(s):843 - 849
    Cited by:  Papers (62)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    In this article, quasi-static and dynamic solutions are derived for microstrip transmission lines on circularly symmetric cylindrical substrates. Novel numerical techniques have evolved which lead to very efficient algorithms. The model is applicable to substrates of arbitrary thickness and cylinder size. Furthermore, it has been checked against a variety of limiting cases, including microstrip on... View full abstract»

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  • Analysis and Design of Microslab Waveguide

    Publication Year: 1987, Page(s):850 - 857
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    Microslab, a novel low-loss semiplanar waveguide, is studied to provide design charts for the propagation constant and characteristic impedance. A parallel-plate analysis is performed to provide design guide-lines based on frequency, conductor loss, and size. A mode-matching procedure is then used to build the design charts. Results are provided for Microslab implementation on GaAs substrates. View full abstract»

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  • Attenuation and Power-Handling Capability of T-Septum Waveguides

    Publication Year: 1987, Page(s):858 - 861
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    In this paper, the attenuation characteristics and power-handling capabilities of single T-septum waveguides are presented.The analysis is based upon numerical solutions employing the Ritz- Galerkin technique [1]. The analysis was verified by applying it to the known results obtained for the ridged waveguide, which is treated as a special case of the T-septum guide. A good agreement has been achie... View full abstract»

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Aims & Scope

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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