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Microwave Symposium Digest, 1978 IEEE-MTT-S International

Date 27-29 June 1978

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Displaying Results 1 - 25 of 177
  • [Front cover, 1978 IEEE MTT-S International Microwave Symposium]

    Publication Year: 1978 , Page(s): f1
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    Freely Available from IEEE
  • 1978 IEEE MTT-S International Microwave Symposium Digest [copyright]

    Publication Year: 1978 , Page(s): i
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    Freely Available from IEEE
  • Committees, 1978 IEEE MTT-S International Microwave Symposium

    Publication Year: 1978 , Page(s): 1 - 4
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    Freely Available from IEEE
  • Awards, 1978 IEEE MTT-S International Microwave Symposium

    Publication Year: 1978 , Page(s): 5 - 10
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    Freely Available from IEEE
  • Technical Program, 1978 IEEE MTT-S International Microwave Symposium

    Publication Year: 1978 , Page(s): 11 - 16
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    Freely Available from IEEE
  • Planning Microwave Device R&D for Defense

    Publication Year: 1978 , Page(s): 17 - 19
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (216 KB)  

    The paper reviews the DOD planning process and presents the historical evolution of content and funding of the DOD electronic devices program since the late 1950's, with emphasis on microwave devices. View full abstract»

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  • Communication for a Mobile Society: Implications of Developments at 900 MHz (Abstract)

    Publication Year: 1978 , Page(s): 20
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    Technical advances and regulatory decisions will make possible substantially increased capacity for vehicular and fully portable communication units. The speaker will review the principal conclusions of a recently completed assessment of the implications of these developments, emphasizing economic, regulatory, organizational and social issues, (See R. Bowers, et al, Communications for a Mobile Society, Sage Publications, Beverly Hills, California; April 1978.) View full abstract»

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  • New Integrated mm-Wave Components Using Fin-Lines

    Publication Year: 1978 , Page(s): 21 - 23
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (240 KB)  

    New integrated fin-line components are presented: reflecting and matched PIN-attenuators, power-divider, PIN double-throw switch, and different oscillator configurations. All exhibit excellent performance and great flexibility in design and application. View full abstract»

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  • An X-Band Balanced Finline Mixer

    Publication Year: 1978 , Page(s): 24 - 26
    Cited by:  Papers (6)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (242 KB)  

    Finline technique has been used in a balanced 9-11 GHz mixer with a 70 MHz intermediate frequency. The conversion loss is less than 5 dB with 3.8 dB minimum. The mixer is tunable by variable shorts. It is possible to scale the mixer to mm-wave frequencies. View full abstract»

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  • Advances in E-Plane Printed Millimeter-Wave Circuits

    Publication Year: 1978 , Page(s): 27 - 29
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (593 KB)  

    Recent work is reported on printed millimeter-wave circuits mounted in the E-plane of rectangular waveguide. The circuits include wideband four-port coupling elements and one-port GaAs and InP Gunn oscillators providing 20 to 60 mW in the range of 55 to 70 GHz, with mechanical tunability up to 8 GHz. View full abstract»

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  • Simulation Study of Electronically Scannable Antennas and Tunable Filters Integrated in a Quasi-Planar Dielectric Waveguide

    Publication Year: 1978 , Page(s): 30 - 32
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (219 KB)  

    Preliminary studies on electronically scannable leaky-wave antennas integrated in a dielectric waveguide are reported. Electronic scan is simulated by a small mechanical motion from which the relation between the scan angle and the necessary change in dielectric constant can be derived. The work is also applicable to electronically tunable band-stop filters. View full abstract»

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  • An Alignment Technique for Multiple Ball YIG Bandpass Filters Operating Over Multi-Octave Frequency Bands

    Publication Year: 1978 , Page(s): 33 - 36
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (777 KB)  

    To date, the alignment of a multi-sphere YIG bandpass filter for multi-octave frequency bands has been designated as a "Black Art" performed by a rare breed of highly skilled and patient individuals. The intent of this paper is to bring YIG filter alignment out of the realm of "tweaking and hunting", thereby significantly reducing the cost per unit. A logical step by step alignment procedure applicable to any YIG or Ga YIG multi-sphere bandpass filter is presented. The validity of the technique has been verified by many successfully aligned complex filters. View full abstract»

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  • 14-GHz MIC 16-ns Delay Filter for Differentially Coherent QPSK Regenerative Repeater

    Publication Year: 1978 , Page(s): 37 - 40
    Cited by:  Papers (6)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (282 KB)  

    A parallel-coupled microstrip fused silica filter at 14 GHz was developed as a 16-ns delay element for application to direct detection with a differentially coherent quaternary PSK (DQPSK) demodulator/regenerator module of an onboard regenerative repeater for future satellite-switched time-domain multiple-access (SS-TDMA) satellite communications systems. Design considerations, experimental results of the 14-GHz bandpass delay element, and a technique for precision measurement of the fused silica filter delay phase temperature coefficient are presented. In addition, the expected DQPSK demodulator performance is evaluated by simulation analysis using a comprehensive transmission channel modeling program. View full abstract»

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  • Improvement of Performances of Microstrip Structures by Equalization of Phase Velocities

    Publication Year: 1978 , Page(s): 41 - 43
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (271 KB)  

    It is well known that, in the TEM approximation, the electrical characteristics of microstrips couplers are easily obtained, if we assume the equality between the odd, even modes phase velocities. In the other hand the directivity of such couplers is considerably decreased when the gap between these velocities increased. So, it can be very useful to equalize them. This result can be achieve by using a dielectric overlay or an upper ground plaine symetrical of the lower one with regard to the conductors. This last result can be generalized to a n-parallel microstrip device. Advantages, disadvantages of these two technics are discussed, experimental results are given. View full abstract»

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  • A Matched Coaxial-Radial Transmission Line Junction

    Publication Year: 1978 , Page(s): 44 - 46
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (161 KB)  

    A broadband transition between coaxial and radial transmission lines was designed by means of an equivalent circuit developed for the junction. The design accuracy was substantiated by excellent correlation between measured and theoretical performance. View full abstract»

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  • A Comparison of Four Overmoded Canonical Narrow Bandpass Filters at 12 GHz

    Publication Year: 1978 , Page(s): 47 - 49
    Cited by:  Papers (3)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (473 KB)  

    The relative merits of four waveguide modes, square TE/sub 103/ and TE/sub 105/ and cylindrical TE/sub 113/ and TE/sub 011/, in constructing small, lightweight, low loss, narrow bandpass canonical filters for use at 12 GHz and above are presented in this paper. The TE/sub 113/ mode is the choice of the present study. View full abstract»

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  • Integrated Gigabit Logic -- State of the Art Assessment and Performance Projections

    Publication Year: 1978 , Page(s): 50 - 53
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (291 KB)  

    After an overview of a wide range of technologies featuring sub-nanosecond ring oscillator stage delays, a simple method is described to convert such data into gate delays and flipflop clock rates in larger monolithic integrated circuits. Performance and chip complexity advancement for 1980 and 1985 are projected. View full abstract»

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  • A Multi-Gigabit Signal Processing System

    Publication Year: 1978 , Page(s): 54 - 57
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (288 KB)  

    Signal processing in the multi-gigabit per second range can be accomplished by making use of a very simple ring diode structure imbedded in a MIC. This circuit can be characterized as a single pole double throw switch with switching times of less than 100 ps. It is capable of performing as the basic element in a variety of processing functions including signal multiplexing, demultiplexing signal sampling and as a shift register. Data rates up to 4 GB/S have been processed using this technique. View full abstract»

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  • Microwave GaAs FET Switching

    Publication Year: 1978 , Page(s): 58 - 60
    Cited by:  Papers (14)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (450 KB)  

    Microwave switching using GaAs field effect transistors offers very high speed and low drive control power. Using arrays of such FETs, an 8 x 8 switch matrix was constructed for 4 GHz SS-TDMA spacecraft applications which achieved 1 ns transition time at 10 mW drive control power. Matrix isolation over 500 MHz bandwidth was 50 dB. View full abstract»

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  • 1.6Gb/s 16-level Superposed APSK MODEM with Baseband Signal Processing Coherent Demodulator

    Publication Year: 1978 , Page(s): 61 - 63
    Cited by:  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (415 KB)  

    A 1.6Gb/s 16-level superposed APSK MODEM using newly developed baseband signal processing coherent demodulator is described. The MODEM has much improved performance characteristics while having much simplified configuration comparing with the already reported one. Jitter power of the recovered carrier is less than -36dB and required C1/N for BER of 10/sup -9/ is better than 25.4dB through the MODEM loop back test (BT = 1.35). View full abstract»

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  • An Integrated DQPSK Demodulator for 14-GHz Satellite Communications Applications

    Publication Year: 1978 , Page(s): 64 - 66
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (349 KB)  

    An MIC assembly for direct DQPSK demodulation at 14 GHz is described. A time delay of 16.6 ns (120 Mbit/s) is achieved by edge-coupled bandpass filters. Quadrature phase detection is provided by a novel MIC topology that causes RF and IF ports to occur in adjacent pairs. An electronic phase shifter provides near linear phase shift with bias voltage. Temperature compensation maintains the phase errors to within 5/spl deg/ for a 20/spl deg/C temperature change. View full abstract»

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  • 6 GHz 5W GaAs FET Power Amplifier for 78 Mbits/s 8-Phase PSK Signal Transmission

    Publication Year: 1978 , Page(s): 67 - 69
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (311 KB)  

    This paper describes the configuration and performance of a 6 GHz 5W power amplifier using GaAs power FET's, developed for transmission of a 78 Mbits/sec. 8-phase PSK signal. View full abstract»

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  • A Logic Module Using Transferred-Electron Logic Devices for Time-of-Arrival Determination of GHz Signals

    Publication Year: 1978 , Page(s): 70 - 72
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (315 KB)  

    An experimental logic module for high precision time interval measurements is described. The fast switching properties of transferred-electron devices, MESFETs and SRDs are utilized in novel circuit designs for subnanosecond, single event measurements. View full abstract»

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  • A Network Reduction Technique for Microstrip Three-Dimensional Problems

    Publication Year: 1978 , Page(s): 73 - 75
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (273 KB)  

    A method is presented for obtaining the equivalent capacitances of microstrip discontinuity structures. The method of formulation and solution is based on the resistive network reduction technique. The formulation results in a matrix eigenvalue problem and permits us to obtain more accurate results with a relatively short computer time requirement. Numerical results for a variety of discontinuity configurations are presented and compared with results published by other investigators. Excellent agreement has been obtained in all cases. View full abstract»

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  • Generalized Spectral Domain Method for Multi-Conductor Printed Lines and its Application to Tunable Suspended Microstrips

    Publication Year: 1978 , Page(s): 76 - 78
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (205 KB)  

    An efficient method is developed for obtaining propagation characteristics of microstrip-line type structures in which a number of conductors are located on various interfaces. Specific computations have been carried out for suspended microstrip line structures with tuning conductive septums. A number of are included. View full abstract»

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