Compact Microstrip Filtenna Designed For Wireless Local Area Network Applications

A small filtering patch Antenna is presented in this work, it consists of a bandpass filter integrated with a monopole radiating antenna. Utilizing Defected Microstrip and Ground Structures (DMS,DGS), a slot is implemented in both the patch and the ground. The bandpass filter is made up of half-wavelength and dual-stub resonators. This filtenna (filtering-antenna) is designed for WLAN applications, and operates in the 5.15-5.35 GHz frequency range, with 5.22 GHz is the resonant frequency. The structure is implemented on a compact size of 34.8 x 27.08 x 1.6 mm(3) equivalent to an electrical dimension of 0.60 lambda(0)x0.47 lambda(0)x0.027 lambda(0), where lambda(0) is the resonance frequency's free-space wave length. The simulation software used is ANSYS HFSS, which is based on the finite element method. In the E-plane, the filtenna has a bidirectional radiation pattern, while in the H-plane, it has an omnidirectional radiation pattern. A high selectivity, good reflection coefficient and an excellent VSWR were attained in this work.