Axial Cross Polarization in Reflector Antennas with Surface Errors of Large Correlation Diameter

Joseph A. Jervase; Samir I. Ghobrial

doi:10.1109/TAP.1983.1143107

Axial Cross Polarization in Reflector Antennas with Surface Errors of Large Correlation Diameter

Joseph A. Jervase, Samir I. Ghobrial

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Equations for boresight cross polarization and isolation of axisymmetric and offset antennas in the presence of surface errors are derived in terms of numerically computable integrals. Computations revealed that 1) for root mean square (rms) error <λ/4 cross polarization increases monotonically with increasing rms error; and 2) maximum cross polarization occurs when the correlation diameter is 0.5 D for axisymmetric antennas (0.8 D for offset antennas). For rms error >λ/4 boresight cross polarization remains almost constant. Furthermore, results revealed that for given correlation diameter and rms error, axisymmetric antennas offer better boresight isolation in comparison with offset antennas having the same polarization efficiency.

Original language	English
Pages (from-to)	662-665
Number of pages	4
Journal	IEEE Transactions on Antennas and Propagation
Volume	31
Issue number	4
DOIs	https://doi.org/10.1109/TAP.1983.1143107
Publication status	Published - 1983

ASJC Scopus subject areas

Electrical and Electronic Engineering
Condensed Matter Physics
Computer Networks and Communications

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AU - Ghobrial, Samir I.

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N2 - Equations for boresight cross polarization and isolation of axisymmetric and offset antennas in the presence of surface errors are derived in terms of numerically computable integrals. Computations revealed that 1) for root mean square (rms) error <λ/4 cross polarization increases monotonically with increasing rms error; and 2) maximum cross polarization occurs when the correlation diameter is 0.5 D for axisymmetric antennas (0.8 D for offset antennas). For rms error >λ/4 boresight cross polarization remains almost constant. Furthermore, results revealed that for given correlation diameter and rms error, axisymmetric antennas offer better boresight isolation in comparison with offset antennas having the same polarization efficiency.

AB - Equations for boresight cross polarization and isolation of axisymmetric and offset antennas in the presence of surface errors are derived in terms of numerically computable integrals. Computations revealed that 1) for root mean square (rms) error <λ/4 cross polarization increases monotonically with increasing rms error; and 2) maximum cross polarization occurs when the correlation diameter is 0.5 D for axisymmetric antennas (0.8 D for offset antennas). For rms error >λ/4 boresight cross polarization remains almost constant. Furthermore, results revealed that for given correlation diameter and rms error, axisymmetric antennas offer better boresight isolation in comparison with offset antennas having the same polarization efficiency.

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Axial Cross Polarization in Reflector Antennas with Surface Errors of Large Correlation Diameter

Abstract

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