Planar compact multi-band monopole-slot antenna for IEEE 802.16m application

Abstract

A novel compact design of planar multi-band slot antenna for IEEE 802.16m WiMAX system is proposed. With the use of Cand inverted L-shaped slots, multi resonant modes close to 2.6 / 3.5 / 5.5 GHz bands can be excited to meet the specifications of WiMAX system (IEEE 802.16m). The obtained impedance bandwidth across these operating bands can reach about 525 / 743 / 813 MHz for the 2.6 / 3.5 / 5.5 GHz bands, respectively. We derive more than 10% reduction in antenna size and gain compact operation only from 32 × 14 × 0.8 mm 3 antenna dimension. The measured peak gains and total radiation efficiencies are about 3.0 / 4.3 / 5.2 dBi and 88 / 95 / 97 % for the 2.6 / 3.5 / 5.5 GHz bands, respectively, with nearly omnidirectional pattern in the XY-plane.

Compact modified ‘T’ slot circular patch quad band antenna for MIMO applications

“…In general for the good MIMO antenna system, which has low correlation and high isolation and also the mutual coupling between the elements, must be low. The closeness of simulations and measurements results can decide the channel capacity of MIMO system [14]. In fact in MIMO antenna, the effect of sharing a common ground causes severe mutual coupling problem due to surface current.…”