Study of the Effects of the Back Cavity on a Broadband Sinuous Antenna and an Optimized Loaded Back Cavity
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Study of the Effects of the Back Cavity on a Broadband Sinuous Antenna and an Optimized Loaded Back CavityAbstract
Sinuous antennas, like spiral antennas, have wideband characteristics, such as constant beam width and low axial ratio over a broad range of frequencies, and thus they are suitable for communicating in transmitting and receiving over bands of frequencies that may encompass multiple channels. In the presence of the back cavity, the performance of the sinuous antenna is affected. The purpose of this paper is to study the affects of the back cavity, and use these findings to build an optimized lossy cavity to improve the performance of the sinuous antenna. The performance of the antenna with and without the back cavity is compared to the antenna with the optimized loaded cavity.
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