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Microwave Theory and Techniques, IEEE Transactions on

Issue 10 • Date Oct. 1976

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Displaying Results 1 - 16 of 16
  • [Front cover - Oct. 1976]

    Publication Year: 1976 , Page(s): f1 - f2
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    Freely Available from IEEE
  • The Segmentation Method - An Approach to the Analysis of Microwave Planar Circuits (Short Papers)

    Publication Year: 1976 , Page(s): 662 - 668
    Cited by:  Papers (63)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (607 KB)  

    In many practical planar circuitries, the circuit pattern can be divided into several segments which themselves have simpler shapes such as rectangles. The segmentation method proposed in this short paper is a method in which the characteristics of a planar circuit are computed by combining those of the segmented elements. It features a relatively short computer time required. The principle and computer algorithm are described. Finally, as an example, the application of the proposed method to the trial-and-error optimum design of a ladder-type 3-dB hybrid is described. View full abstract»

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  • TLMRES - The TLM Computer Program for the Analysis of Microstrip Resonators (Computer Program Descriptions)

    Publication Year: 1976 , Page(s): 675
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (53 KB)  

    This program, based on the TLM method of numerical analysis in three dimensions, provides the exact numerical solution for general electromagnetic-wave problems. View full abstract»

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  • Contributors, Oct. 1976

    Publication Year: 1976 , Page(s): 676
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  • Overseas abstracts

    Publication Year: 1976 , Page(s): 676 - 681
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    Freely Available from IEEE
  • IEEE Press Books Coupon [advertisement]

    Publication Year: 1976 , Page(s): 682
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    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1976 , Page(s): b1 - b2
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  • A Discriminator-Stabilized Microstrip Oscillator (Short Papers)

    Publication Year: 1976 , Page(s): 648 - 650
    Cited by:  Papers (6)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (320 KB)  

    A 5.2-GHz microstrip Gunn oscillator has been frequency stabilized by means of a novel microstrip discriminator and integrated feedback loop. A stabilization factor of 1000 was measured for the oscillator with art external Q of 50. The self-capture bandwidth of the discriminator circuit is large enough to eliminate the need for a search voltage to obtain initial frequency locking. View full abstract»

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  • Posttuning Drift of a Transferred-Electron-Device Voltage-Controlled Oscillator (Short Papers)

    Publication Year: 1976 , Page(s): 650 - 656
    Cited by:  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (680 KB)  

    An experimental study was done on the parameters affecting the frequency drift of a transferred-eletron-device (TED) controlled oscillator (VCO) after tuning from one frequency to another within its tuning band. For the VCO measured, reduction in frequency drift was observed and measured when: 1) the output power was reduced voltage either by decoupling the load or by using a lower power TED; 2) the voltage swing was restricted so as to draw less than 10 mu A forward or reverse current; and 3) when a varactor with a high Q was used. With 5-mW output the TED VCO had a frequency drift less than 2.5 MHz from 1 mu s to 100 ms when step tuning the frequency anywhere in the frequency band from 6.8 to 9.1 GHz. View full abstract»

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  • Absolute Load Detection with Microwave Gunn Oscillators (Short Papers)

    Publication Year: 1976 , Page(s): 656 - 660
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (632 KB)  

    The change in the dc I-V properties of Gunn-flange microwave oscillators with a change in microwave load are shown to provide a method of measuring the physical properties of dielectric samples that only requires the measurement of dc voltages and currents. A phenomenological equivalent-circuit model has been developed that predicts a dependence of detection sensitivity on bias resistance that agrees closely with experiment and that explains the restrictions on such a bias resistor's maximum allowed value. Properties of a prototype system capable of measuring sample size with 8-percent accuracy are presented. View full abstract»

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  • The Design and Performance of Three-Line Microstrip Couplers

    Publication Year: 1976 , Page(s): 631 - 640
    Cited by:  Papers (49)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1040 KB)  

    An analysis is presented of microstrip-coupler circuits consisting of three parallel lines. The analysis is based on the existence of three mode impedances. Design equations describing the performance of this type of coupler are derived and allow the prediction of its matching and transmission properties. Numerical results using finite difference methods are presented for a three-line microstrip coupler made on an alumina substrate (k = 9.8). Experimental results for a 10-dB tbree-line coupler with a center frequency of 4 GHz show that its performance can be reasonably well predicted by the developed theory. View full abstract»

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  • Experimental Development of Simulated Biomaterials for Dosimetry Studies of Hazardous Microwave Radiation (Short Papers)

    Publication Year: 1976 , Page(s): 669 - 673
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (488 KB)  

    Simulated biotissues have been developed which are appropriate for dosimetry studies at X-band frequencies and for S-band modeling experiments which would use miniature phantoms at X-band frequencies. A short-circuited waveguide system has been built and tested for the precise measurement of the dielectric properties of the simulated tissue. Modifications of composition for varying the dielectric properties over a wide range have been found. The specific heats of the materials have been measured and are approximately the same as the tissues they represent. View full abstract»

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  • A Variable Directional Coupler Using InSb Thin Films (Short Papers)

    Publication Year: 1976 , Page(s): 660 - 662
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (392 KB)  

    A variable directional coupler whose coupling is varied by an applied dc magnetic field is presented in this short paper. The directional coupler is of the two-hole type having InSb thin films in the coupling apertures to which the magnetic field is applied perpendicularly. The directional coupler was tested at room temperature at frequencies from 32 to 36 GHz. At a frequency of 33.1 GHz and magnetic flux densities of up to 13 kG, the coupling varies from 14.2 to 40.2 dB with the directivity exceeding 24.6 dB, the insertion loss of about 1 dB, and the VSWR of 1.2. View full abstract»

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  • General TE011-Mode Waveguide Bandpass Filters

    Publication Year: 1976 , Page(s): 640 - 648
    Cited by:  Papers (14)  |  Patents (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (800 KB)  

    A new structure for high-Q TE011-mode circular waveguide cavities is introduced and shown to realize the most general bandpass-filter transfer functions. Methods of improving the mode purity and suppressing the degenerate TE111 mode are presented. Several experimental narrow-bandpass filters having finite attenuation poles have been constructed; their measured responses show excellent agreement with theory. Average realizable unloaded Q's of 20000 and 16000 have been achieved at 8 and 12 GHz, respectively. View full abstract»

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  • Temperature Compensation of TE011-Mode Circular Cavities (Short Papers)

    Publication Year: 1976 , Page(s): 668 - 669
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (240 KB)  

    This short paper describes a novel method for temperature compensation of TE011-mode circular-waveguide cavities. Implementation and experimental results on a single cavity are presented. View full abstract»

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  • Observation and Application of High-Order Azimuthal Modes in a Fabry-Perot Resonator (Short Papers)

    Publication Year: 1976 , Page(s): 673 - 674
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (232 KB)  

    High-order azimuthal modes (p = 0, l> 20) were excited at 10 GHz in a Fabry-Perot resonator. The energy of these modes is distributed in a ring around an energy-free central axis, which lends itself to safety applications on rotating machinery and in measuring density profiles of cylindrical plasmas. 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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