Slotted rook shaped novel wide-band microstrip patch antenna for radar altimeter, IMT, WiMAX and C-band satellite downlink applications

In this paper, a slotted rook shaped novel wide band microstrip patch antenna suitable to be employed for C-Band satellite downlink, Radio Altimeter, IMT, WiMAX applications has been proposed. The proposed antenna is resonant at 4.3 GHz with an impedance bandwidth of 1.419 GHz (3.181 GHz to 4.6 GHz) and a return loss of -53.94dB. The Teflon is used as substrate for designing the proposed antenna having dielectric constant (ε_r) of 2.1 with a thickness of 8mm with a radiating patch on the top of substrate and a reduced ground surface at the lower side of substrate. The ground plane has been reduced to enhance the performance in terms of bandwidth and return loss. The antenna has a gain of 3.64 dB and directivity of 3.70 dBi at frequency of 4.3 GHz. The performance of the proposed antenna has been analyzed in terms of return loss (dB), directivity (dBi), gain (dB), smith chart and VSWR. The CST Microwave Studio 2014 has been used for design antenna. The antenna has been fabricated and tested for experimental validation using Network Analyzer E5071C and anechoic chamber. It has been observed that the practical results closely match with the simulated results of the antenna.