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Microwave Symposium, 1975 IEEE-MTT-S International

Date 12-14 May 1975

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Displaying Results 1 - 25 of 144
  • [Front cover, 1975 IEEE MTT-S International Microwave Symposium]

    Publication Year: 1975 , Page(s): f1
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    Freely Available from IEEE
  • 1975 IEEE MTT-S International Microwave Symposium, Digest of Technical Papers [front matter]

    Publication Year: 1975 , Page(s): i - ii
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    Freely Available from IEEE
  • Committees, 1975 IEEE MTT-S International Microwave Symposium

    Publication Year: 1975 , Page(s): 1 - 5
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    Freely Available from IEEE
  • Awards, 1975 IEEE MTT-S International Microwave Symposium

    Publication Year: 1975 , Page(s): 6 - 11
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    Freely Available from IEEE
  • Technical Program, 1975 IEEE MTT-S International Microwave Symposium

    Publication Year: 1975 , Page(s): 12 - 18
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    Freely Available from IEEE
  • Session 1 - Microwaves in Earth Sensing [breaker page]

    Publication Year: 1975 , Page(s): 19
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    Freely Available from IEEE
  • Passive Microwave Sensing of the Earth

    Publication Year: 1975 , Page(s): 20 - 22
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (330 KB)  

    Passive microwave radiometers have found varied geophysical applications, particularly the remote sensing from satellites of atmospheric temperature and humidity profiles, clouds, soil moisture, snow and ice type and coverage, and other parameters. View full abstract»

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  • Satellite Altimetry Applications

    Publication Year: 1975 , Page(s): 23 - 25
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (252 KB)  

    This paper provides the brief background of precision satellite altimetry. A description of satellite altimetry concepts and instrumentation is presented. The parameters measured, supporting data and techniques, as well as physical limitations, are discussed. In addition, results are shown and a variety of applications are emphasized. View full abstract»

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  • Microwave Scattering from the Ocean Surface

    Publication Year: 1975 , Page(s): 26 - 28
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (264 KB)  

    This paper is a review of current aircraft and satellite microwave remote sensing programs concerned with the measurement of ocean wave and surface wind conditions. These particular measurements have been identified by the user community as offering significant economic and technological benefits. Active microwave remote sensing techniques for these applications have been described theoretically and verified experimentally. The results of recent aircraft and satellite experimental programs are presented herein along with plans for the SeaSat-A Satellite Scatterometer. View full abstract»

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  • Imaging RADAR Potentials for Earth Resources

    Publication Year: 1975 , Page(s): 29 - 31
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (337 KB)  

    The potentials of airborne and spacecraft borne imaging radars in earth resources applications are reviewed and discussed. The areas specifically addressed are: oceanography, coastal regions studies, glaciology, polar ice studies, geology, geomorphology and agriculture. The paper also addresses the main areas of emphasis for the next ten years. View full abstract»

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  • Session 2 - Microwaves in Communication [breaker page]

    Publication Year: 1975 , Page(s): 33
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    Freely Available from IEEE
  • Some Aspects of Microwave Development in a Developing Country

    Publication Year: 1975 , Page(s): 34 - 36
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    The development of modern telecommunications systems is a major factor of progress in countries experiencing a fast economic growth. General information is given on the recent development of micro wave systems and of microwave activities in general in Brazil. View full abstract»

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  • Bi-Polar IC's for Microwave Signal Processing

    Publication Year: 1975 , Page(s): 37 - 39
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (174 KB)  

    Various microwave signal processing functions can be performed with monolithic circuits designed to operate as high speed logic elements. The ease of interfacing with these circuits for various modes of operation offers a significant advantage over more conventional microwave components. The application of the one GB/S logic family is demonstrated by a 2 GHz prescaler, a QPSK Modulator, a QPSK Demodulator and an Adaptive Equalizer. View full abstract»

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  • Microwave QPSK Demodulation Techniques at the Receiver Front End

    Publication Year: 1975 , Page(s): 40 - 42
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (273 KB)  

    Quadriphase modulation of microwave or mm-wave carriers involves the rapid shifting of the phase of the carrier between one of four orthogonal positions by binary data included on two parallel data streams. The received quadriphase (QPSK) carrier can be demodulated by mixing this carrier with an appropriately phased local oscillator signal in a doubly-balanced mixer. One of the problems in demodulation of quadriphase carriers is the generation of the local oscillator having carrier frequency and phase information. This can be accomplished either at RF from the incoming QPSK carrier or at baseband by comparing the crosstalk associated with the two demodulated data streams. This paper will describe the applicable microwave technologies utilizing special quadrupler frequency multipliers which provide microwave carrier reconstruction which facilitates the demodulation of data information from the carrier. View full abstract»

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  • Electronically-Tunable, Low Noise Ka-Band Paramp-Downconverter Satellite Communications Receiver

    Publication Year: 1975 , Page(s): 43 - 45
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (390 KB)  

    The Ka-band-to-UHF parametric amplifier-downconverter satellite communications receiver described herein provides less than 4 dB SSB noise figure over either electronically selectable sideband of the externally supplied- 37.5 GHz local oscillator, each of which is downconverted to a fixed 500-650 MHz IF output band. To achieve such widely tunable low noise performance, this receiver utilizes state-of-the-art varactors, a unique, solid-state pumped Ka-band paramp design and a low noise balanced mixer-transistor IF amplifier, incorporated with associated power supply and thermal stabilization in a self-contained 6" × 5" × 4" package. View full abstract»

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  • Depolarization Measurements on the ATS-6 20 GHz Downlink: A Description of the VPI&SU Experiment and Some Initial Results

    Publication Year: 1975 , Page(s): 46 - 48
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (186 KB)  

    This paper describes an experiment in which precipitation depolarization on the ATS-6 20 GHz downlink is measured. It presents some initial results for depolarization by snow. View full abstract»

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  • Session 3 - Microwave Filters and Components I [breaker page]

    Publication Year: 1975 , Page(s): 49
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    Freely Available from IEEE
  • Solving the Approximation Problem for Narrowband Bandpass Filters with Equal-Ripple Passband Response and Arbitrary Phase Response

    Publication Year: 1975 , Page(s): 50
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (95 KB)  

    A practical method is presented for solving the approximation problem for narrowband bandpass filters with equal-ripple passband response and arbitrary phase response. The method determines the element values of the low-pass prototype filter and is based on the use of generalized Chebyshev rational functions with arbitrary choice of transmission zero locations. The use of both real frequency and complex frequency trans- mission zero locations is considered. Results of trial design problems are presented and are related to previous design results to illustrate practical realization and performance limitations. View full abstract»

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  • Template Methods for Efficient Microwave Filter Design

    Publication Year: 1975 , Page(s): 51 - 52
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (258 KB)  

    A method is presented to design a commensurate microwave filter, containing stubs, unit elements and arbitrary finite attenuation poles in such a way that it satisfies arbitrary system attenuation requirements in an optimal way. View full abstract»

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  • Microwave Filters with Single Attenuation Poles at Real or Imaginary Frequencies

    Publication Year: 1975 , Page(s): 54 - 56
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (417 KB)  

    A new unified theory is presented for the synthesis of exactly equi-ripple low pass prototypes having (a) one simple pole of attenuation at a real frequency,or (b) a single pair of real axis transmission zeros (giving linear phase performance). Practical results for microwave bandpass filters are described. View full abstract»

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  • On the Field Energy and Power of Waveguides and Cavities Synthesized with Nonseparable Solutions of Helmholtz Wave Equation .

    Publication Year: 1975 , Page(s): 57 - 59
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (144 KB)  

    This paper shows that microwave cavities and waveguides synthesized with nonseparable solutions of Helmholtz wave equations have interesting properties concerning field energy and Power. Moreover they have better attenuation and Q factor in comparison with the conventional waveguides and cavities. View full abstract»

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  • Generalized TE/sub 011/ Mode Waveguide Bandpass Filters

    Publication Year: 1975 , Page(s): 60 - 62
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    The realization of the general transfer functions of bandpass coupled cavity filters in the high Q circular waveguide TE011 mode is presented in this paper. In addition, a novel method of suppressing the degeneracy of the TM111 mode is described. Finally, experimental results obtained from a fourth-order, elliptic function, 20-MHz, bandpass filter centered at 12 GHz and having an unloaded Q of 16,000 are discussed. View full abstract»

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  • Microwave Bandpass Filters Containing Dielectric Resonators with Improved Temperature Stability and Spurious Response

    Publication Year: 1975 , Page(s): 63 - 66
    Cited by:  Papers (31)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (244 KB)  

    The development of dielectric resonator superior to invar cavity on temperature stability as the result of our research made the usage of the miniature bandpass filter practical, and the method to set up temperature coefficient was established well. View full abstract»

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  • Session 4 - Microwave Generation and Amplification [breaker page]

    Publication Year: 1975 , Page(s): 67
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    Freely Available from IEEE
  • Active Solid State Microwave Device Performance

    Publication Year: 1975 , Page(s): 68 - 69
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (30 KB)  

    There is now a wide variety of solid state devices available for use as oscillators and/or amplifiers in microwave systemsFigure 1 illustrates this variety. The choice for a specific application is based on a number of performance factors, some of which are listed in Table I. In this paper we shall explore relative device performance with the objective of providing the potential user with a basis for choosing the best device for his application. View full abstract»

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