X-Band and Ku-Band Patch Antenna for Radio Location Applications

Abstract

Simple and compact microstrip patch antenna for radiolocation application in X-band and Ku-band is proposed. Using three rectangular and two cylindrical slots in patch, we get one frequency band (9.8–10.3 GHz) in X-band and another band (13.23–13.60 GHz) in Ku-band and both the bands are used for radiolocation applications. The proposed antenna is designed on Rogers R04350 substrate with dielectric constant 3.66 and thickness 1.5 mm and its overall size is 10 × 10 × 1.57 mm³ with patch size 7 × 8 × 0.035 mm³. The results of the proposed antennas like return loss, VSWR, and radiation pattern (gain, directivity, and efficiency) are simulated and analyzed using commercial computer simulation technology microwave studio (CST MWS). By simulating this antenna structure using the above EM tool, we are getting two resonant frequencies 10.12 and 13.5 GHz. The return loss at these frequencies is −34.19 dB and −32.75 dB which is very good. The gain at the first resonant frequency is 4.76 dB and at second resonant frequency it is 5.14 dB and the efficiency at both the resonant frequencies is 93 and 72.2 %. The value of VSWR ≤ 1.5 for both the resonant frequencies. The main application of the proposed antenna is to make it compatible with radiolocation applications in X-band (8–12 GHz) and Ku-band (12–18 GHz).