Design of a Compact Dual-Frequency Microstrip Antenna for Millimeter-Wave Applications

Abstract

A millimeter-wave (MMW) antenna has been proposed for a current and future wireless application. The proposed model has two resonances at 30.5 GHz and 52.4 GHz. The proposed model has been designed and optimized using a commercial electromagnetic simulator (CST-Studio) and focussed on attaining a return loss rate that is lower than -10 dB. The proposed MMW models were built on a small thick Rogers Substrate (RT-5880) with h = 0.508 mm for the thickness, relative permittivity of epsyilon r = 2.2 and tan delta= 0.0009 for the loss tangent. In order to assure reliability, mobility and high efficiency, the proposed antenna has a small size, low profile and straightforward design structure. It can be employed for a variety of MMW applications e.g. wireless personal area network (WPAN) and 5G applications in some countries e.g. Colombia and Mexico. The proposed model has a moderate gain of 3 - 7 dBi at resonance frequencies of 30.5 GHz and 52.4 GHz, which is one of the unique characteristics of the proposed antenna. The impedance bandwidth is between 28.7 Ghz and 32.6 GHz, equalling to 3.9 GHz, and 49.7 - 56.2 GHz, which then is equal to 6.5 GHz respectively for the proposed model, and satisfying efficiency of about 75 % and 87 % as calculated by CST-Studio, and a VSWR equal to 1. All of these positive results are more than enough to satisfy the needs of MMW wireless applications.