Novel high-gain and compact UWB microstrip antenna for WIFi, WIMAX, WLAN, X band and 5G applications

In this paper, we use a new technique to improve the gain and the bandwidth of a small size ultra-wide-band (UWB) circular microstrip antenna. The technique is based on a non-uniform microstrip line feed width and using a partial rectangular ground plane. The compact structure is printed on the economical FR4 substrate material with a relative permittivity 4.4 and loss tangent 0.02 with a degree of miniaturization 39.3 x 30 x 1.6 mm(3) compatible with the integration technology of components in communications systems architecture. The proposed antenna is simulated and optimized using electromagnetic simulators high frequency structure simulator, results show a good characteristics and radiating behavior within the UWB frequency. The simulated results established that our design has a very important gain (10 dB), and huge bandwidth: from 2.74 to 76.83 GHz for return loss S11 < - 10 dB and covered multi-band for many applications such as: wireless fidelity system, wireless local area network: operate within the UWB band, worldwide interoperability for microwave access, the 5th generation mobile network (5G). The measured antenna parameters are presented and discussed, confirming the simulation results in the interval [0.1, 20]GHz using ZNB 20 vector network analyser 100 KHz-20 GHz.