Broadband Thin-Film Microstrip Superconducting Antenna

A thin-film superconducting microstrip antenna with simple structure, small size and low profile is proposed. Because of easy integration, printed monopole structure is adopted. The patch and ground are both made of YBCO (Y Ba
₂
Cu
₃
O
_7-x
) superconducting thin film, and respectively built on both sides of a 0.5 mm thick MgO substrate. The size of the proposed antenna is 25mm × 25mm, and the return loss is below -10 dB over the frequency bandwidth of 3.1-25.2 GHz for UWB, broadcasting digital satellite, Ku-band and K-band applications. Relative bandwidth is about 156%, which is much wider than that (54%) of conventional UWB antennas. Simulated results are presented for return loss, radiation pattern gain, and radiation efficiency. Moreover, these results are shown that the proposed antenna has a superior performance.