UHF Compact Dual-Band Circularly Polarized Antenna Loaded With Split-Ring Resonators for Satellite Communications

A novel UHF compact dual-band circularly polarized (CP) antenna loaded with split-ring resonators (SRRs) for satellite communications is presented. The main body of the proposed antenna consists of three sequentially rotationally arranged bent PIFA elements which can effectively reduce the size of the antenna. Additionally, three integrated SRRs are loaded in the middle of the main body for the dual-band operating and further miniaturization of the antenna. The three PIFA elements and SRRs are closely spaced, resulting in a very compact structure. A prototype working at 405/495 MHz with the size of 0.15×0.15×0.07λ
₀
³
is designed, which merits low cost, compact size, easy fabrication and good performance.