Feeding structure contribution to radiation by patch antennas with rectangular boundaries

A combination of piecewise sinusoidal-pulse functions and semi-infinite microstrip current expansion functions is used in the full-wave spectral-domain method to analyze microstrip antennas with arbitrary rectangular boundaries. Radiation properties are formulated in the spectral domain to achieve h...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 1992-10, Vol.40 (10), p.1245-1249
Main Authors: Wu, S.-C., Alexopoulos, N.G., Fordham, O.
Format: Article
Language:English
Subjects:
Antenna feeds
Antenna measurements
Antenna radiation patterns
Current distribution
Dielectric substrates
Impedance measurement
Integral equations
Microstrip antennas
Patch antennas
Transmission line measurements
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Summary:A combination of piecewise sinusoidal-pulse functions and semi-infinite microstrip current expansion functions is used in the full-wave spectral-domain method to analyze microstrip antennas with arbitrary rectangular boundaries. Radiation properties are formulated in the spectral domain to achieve high numerical efficiency. Two types of microstrip antennas, edge-fed rectangular and inset fed patches, have been analyzed and measured. A line-reflect-line de-embedding algorithm has been implemented to measure the input impedance of both antennas. The results show good agreement between measurement and calculated data. The radiation patterns from the edge-fed rectangular patch are measured and are compared with the theoretical data. Results show that the current on the feed line can disturb the antenna radiation pattern.< >
ISSN:0018-926X
1558-2221
DOI:10.1109/8.182458