X-band microstrip array antenna with integrated radome

Abstract

An array antenna with an integrated radome, consisting of microstrip elements with a flat radome cover layer is introduced. The effects of a flat radome layer on the microstrip array antenna at X-band frequencies are examined. The presence of a dielectric radome layer above the radiating elements influences the antenna properties such as the gain, radiation pattern, input impedance and resonant frequency. Using CAD software, simulation results have demonstrated that the integrated radome is similar to an RF lens and can enhance the directivity in the broadside direction. Detailed characteristics of the 2×2 array antenna have been analyzed for two different radome thickness. Antenna simulation and experimental results are discussed.