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Antennas and Propagation Magazine, IEEE

Issue 4 • Date Aug. 1990

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  • High temperature superconductors and their application in passive antenna systems

    Publication Year: 1990 , Page(s): 7 - 18
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1010 KB)  

    The basic physics of superconductivity is reviewed and related to the high-temperature superconductors. The high-frequency characteristics of the new materials are examined, and the two-fluid model is introduced and used to derive an empirical expression for the conductivity of superconductors. The advantages and disadvantages of using these superconductors in the construction of high-frequency tr... View full abstract»

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  • Array feeds for reflector surface distortion compensation: concepts and implementation

    Publication Year: 1990 , Page(s): 20 - 26
    Cited by:  Papers (22)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (707 KB)  

    The development of a compensation algorithm based on the use of array feeds and a focal-plane conjugate field approach is discussed. Results of numerical simulations performed to verify the accuracy of the computer programs are examined, and an experimental study is described. Both the numerical and experimental results show that the array will compensate for the slowly varying surface distortion.... View full abstract»

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  • The role of analysis in an age of computers: view from the analytical side

    Publication Year: 1990 , Page(s): 27 - 31
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (523 KB)  

    The role of both past and current analysis in computer-based electromagnetics research is examined. Some observations on the current status of computer-based solutions are presented. It is concluded that analysis will remain an essential tool for making discoveries of electromagnetic phenomena, for providing physical insight into complex phenomena, and for the development of robust problem formula... View full abstract»

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The IEEE Antennas and Propagation Magazine covers all areas relating to antenna theory, design, and practice.

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Mahta Moghaddam