Scan performance of infinite arrays of microstrip patch elements loaded with varactor diodes

The analysis and scanning characteristics of an infinite array of rectangular microstrip patches each loaded with a varactor diode is presented. The analysis is based on full-wave moment method theory and uses attachment modes to accurately model the current through the feed and the diode. The effec...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 1993-09, Vol.41 (9), p.1273-1280
Main Authors: Waterhouse, R.B., Shuley, N.V.
Format: Article
Language:English
Subjects:
Antennas
Applied sciences
Bandwidth
Blindness
Diodes
Exact sciences and technology
Feeds
Impedance
Inductance
Microstrip antenna arrays
Phased arrays
Predictive models
Radiocommunications
Telecommunications
Telecommunications and information theory
Varactors
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Summary:The analysis and scanning characteristics of an infinite array of rectangular microstrip patches each loaded with a varactor diode is presented. The analysis is based on full-wave moment method theory and uses attachment modes to accurately model the current through the feed and the diode. The effect of the biased varactor diode on the scan performance is presented, and it is shown that the impedance mismatch caused by a scan blindness can be eliminated. Other characteristics are also given such as: the active element gain, the efficiency of each loaded microstrip element, and the level of cross polarization generated by the loading of the patch. The effect of the diode biasing level as well as the position of the diode on each radiating element on these scan characteristics is also considered.< >
ISSN:0018-926X
1558-2221
DOI:10.1109/8.247754