Antenna Theory and Design

TL;DR: In this article, an array antenna for multibeam reception with a beamforming network (BFN) that uses spatial optical signal processing was proposed, where signals received at individual antenna elements are converted to optical signals, and are optically divided from the directions of signal arrival by optical spatial Fourier transformation, and then the optical signals are reconverted into microwave signals at the BFN.

TL;DR: In this paper, simple design procedures for use when a Gaussian beam is used to illuminate a classical reflector antenna are presented for the case of electrically small antennas where the aperture is in the near field of the feed.

TL;DR: An analytical analysis method is proposed for the multistatic GEO SAR GAF-based on the array spatial ambiguity function (ASAF), and an orbital element design method that considers the Earth’s rotation is proposed.

TL;DR: Improved circular polarization antennas are developed, which are highly effective for reducing an error in the distance estimation by transceiving RF signals with less dependance on its orientation and a three-dimensional location-sensing algorithm that facilitates a distance and position filter is developed for enhancing accuracy.