A Compact Ultra-Wideband Antenna Design for Satellite Communication Systems

This paper presents a small-sized multilayer ultra-wideband (UWB) patch antenna for satellite communication applications in the X band, Ku band, and K band. The antenna consists of two stacked rectangular patches on the ground plane driven by H-shaped slots with miniaturized dimensions of 40 × 40 × 5.51 mm3. The multilayer structure utilizes RT/Duroid®5880 and FR4 substrates, and simulation results show that the operational bandwidth is 15 GHz (8-23 GHz) with a reflection coefficient less than -10 dB. The proposed design exhibits stable omnidirectional radiation patterns, a peak gain of 8.3 dB, and an excellent VSWR across the entire operating band. The comparison of the proposed antenna against existing literature shows that the proposed antenna has a lot of benefits, as it achieves size reduction while maintaining broader bandwidth and higher gain than comparable designs. This antenna has a compact structure, coupled with high impedance matching and radiation properties, which makes this antenna convenient for the current generation of satellite communication systems that need miniaturized broadband components.