Dual-band Circular Polarization Antenna with Muzero Resonance and First-order Negative Mode

Abstract

In this paper, a compact dual-band circular polarization antenna is presented for GPS application. To make the antenna smaller, the mu-zero resonance mode of munegative transmission line and first-order negative mode of composite right-left handed transmission line are employed. The mu-zero resonance and first-order negative modes operates at L2(1.23 GHz) and L1(1.56 GHz) band, respectively. For excitation of two antennas, the cross aperture coupled feed is applied to the dual-band antenna. The size of the proposed antenna is 30mm by 30mm by 6.7mm, it has the peak gain of 0.23 dBic and 4.77 dBic in L1 and L2 band, respectively.