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Proceedings ArticleDOI

Microstrip Antenna Cross-Polarized Radiations, Kai Fong Lee, and Recent Insightful Observations

08 Dec 2020-
TL;DR: In this paper, the cross polarization aspects of microstrip patch from its fundamental understanding which was initiated more than three decades ago through dedicated research and passionate leadership of Kai Fong Lee.
Abstract: This article aims at looking into the cross polarization aspects of micro-strip patch from its fundamental understanding which was initiated more than three decades ago through dedicated research and passionate leadership of Kai Fong Lee. A couple of his fundamental works and their backgrounds have been critically analyzed. In addition, a few recent works on cross-polarization mitigation techniques with new scientific insights have been critically revisited. They endorse Lee’s original observation with deeper insight and also add a new scientific basis for interpreting the cross-polar phenomena.
References
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Journal ArticleDOI
TL;DR: A survey of microstrip antenna elements is presented, with emphasis on theoretical and practical design techniques, and critical needs for further research and development for this antenna are identified.
Abstract: A survey of microstrip antenna elements is presented, with emphasis on theoretical and practical design techniques. Available substrate materials are reviewed along with the relation between dielectric constant tolerance and resonant frequency of microstrip patches. Several theoretical analysis techniques are summarized, including transmission-line and modal-expansion (cavity) techniques as well as numerical methods such as the method of moments and finite-element techniques. Practical procedures are given for both standard rectangular and circular patches, as well as variations on those designs including circularly polarized microstrip patches. The quality, bandwidth, and efficiency factors of typical patch designs are discussed. Microstrip dipole and conformal antennas are summarized. Finally, critical needs for further research and development for this antenna are identified.

1,598 citations

Journal ArticleDOI
TL;DR: There are at least three different definitions of cross polarization used in the literature, and the definition which corresponds to one standard measurement practice is proposed as the best choice.
Abstract: There are at least three different definitions of cross polarization used in the literature. The alternative definitions are discussed with respect to several applications, and the definition which corresponds to one standard measurement practice is proposed as the best choice.

895 citations

Proceedings Article
01 Jan 1972
TL;DR: In this paper, the design procedures for both linearly and circularly polarized antennas are discussed for both UHF and C band and measured patterns are presented for antennas from UHF through C band.
Abstract: Microstrip antennas consist of a planar resonant radiating element parallel to, but separated, from a ground plane by a thin dielectric substrate ( t \ll \lambda ). These antennas are very thin and consequently rugged and easy to mount. They may be fed from the back through the ground plane or from the edge by depositing microstrip lines on the dielectric substrate. Several varieties of microstrip antennas are discussed in this paper. Design procedures are given for both linearly and circularly polarized antennas. Measured patterns are presented for antennas from UHF through C band.

275 citations

Journal ArticleDOI
TL;DR: In this article, a defected ground structure (DGS) pattern is proposed to reduce the cross-polarized (XP) radiation of a microstrip patch antenna, which is simple and easy to etch on a commercial microstrip substrate.
Abstract: A defected ground structure (DGS) is proposed to reduce the cross-polarized (XP) radiation of a microstrip patch antenna. The proposed DGS pattern is simple and easy to etch on a commercial microstrip substrate. This will only reduce the XP radiation field without affecting the dominant mode input impedance and co-polarized radiation patterns of a conventional antenna. The new concept has been examined and verified experimentally for a particular DGS pattern employing a circular patch as the radiator. Both simulation and experimental results are presented.

275 citations

01 Jan 1953

237 citations