Modified Patch and Ground Plane Geometry With Reduced Resonant Frequency

Abstract

A higher degree of miniaturization technique is presented based on frequency reduction method for a rectangular patch antenna by introducing a slot on the radiating patch with unchanged antenna configuration. To realize the frequency reduction technique, a rectangular patch is designed to operate at the fundamental frequency. Then a slot on the radiating patch is introduced, and as an effect of slot, fundamental resonant frequency is shifted to the left side of reflection coefficient plot. The percentage of reduction resonant frequency is 65.80% where 2.31 GHz is the fundamental frequency, and 790 MHz is the operating frequency of slot integrated patch geometry. In addition, we introduced another similar slot on the ground plane, and as a result, resonant frequency shifted from 790 MHz to 729 MHz caused by 68.44% reduction in resonant frequency with unchanged antenna dimension. To verify the simulated theory, prototypes are fabricated and complied with measured results.