Gain Enhanced Broadband L-Probe Inverted E-Shaped Microstrip Patch Antennas

In thispaper, a gain enhanced broadband l-probe inverted frshaped microstrip patch antenna that covers the third generation (3g) band is presented. the design employed two dielectric layers arrangement where a thick air-filledsubstrate was sandwiched between a top-loaded dielectric substrate or superstrate with inverting radiating patch and a ground plane. the broadband characteristic was provided by the thick air-filled substrate and the l-shaped probe structure, while the gain enhancement was due to the superstrate structure. an antenna with a thickness of 12.7 mm was simulated using sonnet em simulator. measurement result showed satisfactory performance with a gain of about 10 db and with achievable bandwidth of> 28% at io-dbreturn loss and >19% at 14-db retum loss.