Analysis and design of broad-band single-layer rectangular U-slot microstrip patch antennas

A wide operating bandwidth for a single-layer coaxially fed rectangular microstrip patch antenna can be obtained by cutting a U-shaped slot on the patch. This antenna structure has recently been found experimentally to provide impedance bandwidths of 10%-40%, even with nonair substrates. However, de...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2003-03, Vol.51 (3), p.457-468
Main Authors: Weigand, S., Huff, G.H., Pan, K.H., Bernhard, J.T.
Format: Article
Language:English
Subjects:
Analytical models
Antenna measurements
Antennas
Approximation
Bandwidth
Coaxial components
Cutting
Design engineering
Geometry
Impedance
Microstrip antennas
Moment methods
Patch antennas
Resonant frequency
Simulation
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Summary:A wide operating bandwidth for a single-layer coaxially fed rectangular microstrip patch antenna can be obtained by cutting a U-shaped slot on the patch. This antenna structure has recently been found experimentally to provide impedance bandwidths of 10%-40%, even with nonair substrates. However, design rules for this antenna have not yet been presented. This paper develops principle design procedures through examination of the structure's multiple resonant frequencies as well as the radiation and impedance properties of different antenna geometries. The approximate design rules are derived by analysis of former experiments, method of moments (MoM) simulations, and measurement results. Simulations and measurements of several antennas designed using these new rules are presented and directions for further study are discussed.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2003.809836