Gain-bandwidth product for aperture-coupled antennas

Bandwidth, gain, and HPBW are the most essential design characteristics in antenna design. Other features such as cross polarization ratio, front-to-back ratio, in-band gain ripple, electrical height, and physical dimensions also play a critical role in the design. It is difficult to define a common figure-of-merit (FOM) that includes all these metrics, but we present several FOM applicable for aperture coupled antennas. Various nonresonant and resonant slot coupled stacked patches are compared to each other to identify the best configuration. Integral equation based solver is used in the computational analysis.