Basic Studies on Aperture for Adaptive Antenna with Switched Loads of Parasitic Elements

摘要

This paper considers an adaptive array antenna in which multiple parasitic elements are placed in concentric circles with the radiating element as the center, and the outputs of the parasitic elements are connected to open, shorted, or fixed loads, so that the directivity can be controlled adaptively. The number of circular arrays, the number of parasitic elements in a circular array, the radius of the circular array, and the value of the fixed load are investigated. All combinations of three arrival wave angles are considered in the horizontal plane within the range of adaptive beam forming. All combinations of load settings are investigated. The design parameters are investigated on the basis of the achieved cumulative SINR distribution function. We find that SINR values above 10 dB can be expected in an environment with up to two interfering waves by constructing an aperture with one circular array with a radius of 0.5λ containing 10 parasitic elements.