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Describes a novel application for contoured beam reflector antennas in wireless applications. Reason for the implementation of ominidirectional radiation pattern specification; Description of the offset reflector antenna configuration; Calculation of the far-field pattern of the reflector antenna.

Presents a study which showed that a compact range reflector edge diffraction can be reduced by using an R-card fence. What are R-cards; Conclusion.

Presents a study which proposed an ultrawide-bandwidth low-scattering antenna. Overview of the feeding structure of the slotline bowtie antenna; Analysis of antenna guiding structure; Summary and conclusion.

A synthesis technique and mechanical design for a reconfigurable contour beam dual-offset-reflector antenna for satellite application are described. Mechanical adjustment is achieved by attaching high-deflection stacked piezoelectric actuators to the rear of a lightweight flexible subreflector surface. Both the main and subreflector surfaces are shaped for an initial required geographical coverage, and the main reflector surface is then assumed to have a fixed shape. The variable shape subreflector is then synthesized to achieve required coverage for different geographical regions and different geostationary positions. To develop this system, the following methodology was developed. Based on the required subreflector surface displacement, mechanical finite-element analysis was conducted on the reflector surface, and an actuator placement study was completed. The surface deflections attained from mechanical actuation were then compared to the required surface deflections. The achieved subreflector surface error was calculated, as well as the effect of the error on the radiation pattern. The results show that one can achieve acceptable performance from a finite amount of actuators on a reflector surface. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 21: 436–446, 1999. [ABSTRACT FROM AUTHOR]

Presents the Chebyshev absorber layout concept for both wedge and pyramidal-absorber applications. Chebyshev multilevel absorber design; Findings and analysis of the measurement of absorber layout concept; Conclusions.

Compares compact range reflector antenna measurements with a serrated edge and a blended, rolled edge reflector. Simulation of phased-scanned array antenna measurement; Radiated field from the stray signal source; Numerical examples of phase-scanned array pattern measurements in a compact range.