Designing a Compact Patch Antenna with Improved Bandwidth Utilizing Stacked H-shaped Patches and Mushroom Type Metamaterials

A compact antenna is designed with relatively broad bandwidth. As demonstrated in our previous work, the compact configuration can be realized by using H-shaped patch and mushroom metamaterials. The main limitation for this design is that the bandwidth is very narrow. In this report to overcome the bandwidth limitation, an additional substrate layer and a parasitic H-shaped patch are designed over the compact meta-antenna. The parasitic and driven patches form a multi-resonance circuit aiming to improve the antenna bandwidth. Full wave simulations reveal that the -10dB bandwidth for the new stacked patch antenna is 8.89% (3.063-3.348GHz). However the parasitic and driven patches are very small. Their sizes are 0.19λ 0 ×0.21λ 0 and 0.18λ 0 ×0.18λ 0 respectively. The simulated antenna gain is 6.06dBi. The efficiency is 89.46%. Both are sufficiently high which makes the antenna suitable for small sized wireless devices.