Dual-Band B-Shaped Antenna Array For Satellite Applications

The paper presents a 1 x 2 B-shaped antenna array for dual-band operation at 4 and 8 GHz. The antenna design consists of a rectangular patch with two annular-strip lines fabricated on the top layer and finite ground plane on the bottom layer. The array is formed by designing an optimum T-shaped microstrip line for impedance matching. The dimensions of the antenna array are 78 x 36 x 1.6 mm(3). Full-wave simulations have been conducted and the measured results are in good consent with the simulated results. The measured impedance bandwidth (reference -10 dB) has been observed at 3.84-4.16 and 7.78-8.38 GHz. Measured peak gain and radiation efficiency at 4 and 8 GHz are 8.3, 9.4 dB and 82.5 and 81.2%, respectively.