Design of Tri-Band Patch Antenna with Enhanced Bandwidth and Diversity Pattern for Indoor Wireless Communication

A novel tri-band patch antenna with enhanced bandwidth and a diverse radiation pattern is presented in this study. An off-center probe introduced to excite conventional circular antenna, the multi-frequency resonance modes of TM01, TM02, TM03 different properties are obtained. Four metal cambered strips distributed around adjust impedance matching antenna. In order widen bandwidth, parasitic placed above employed work. Then, double-layer manufactured tested verify accuracy theoretical analysis simulated result. The measured results, which basically consistent show that designed can operate three bandwidths 1.79–1.81 GHz, 3.74–4.0 4.93–5.44 patterns directional, omnidirectional, three-beam pointing. efficiency higher than 85.6% maximum gain greater 9.42 dBi suggest investigated suitable for multi-service scenarios wireless communication.