Element Active Radiation Analysis in Multiband Shared Aperture Antenna Array

Analysis of active element radiation pattern (AEP) in a multiband shared aperture array configuration is presented. The multiband array layout for analysis is implemented by integrating three different antenna arrays A, B, and C operating in multiple frequency bands into a common shared aperture footprint. The active element radiation pattern of a specific unit cell operating in a designated frequency band is analyzed using three independent configurations, viz. an isolated element, a unit cell in a planar array, and a unit cell in a shared aperture array. The active antenna elements of type
$A$
, B, and C operating at 0.225GHz, 0.450GHz, and 0.900GHz in a planar array and a shared aperture array show variation in beamwidth and gain as compared to isolated element radiation. For element type A gain and beamwidth range from 4.35-6.15dB and 102.4°-116.8°, for element type B from 5.50-7.12dB and 50.3°-105.8°, and for element type C from 5.12-6.30dB and 54.4°-110. 4° respectively.