Compact Circularly Polarized Low-Profile ...

In this article, the design of a novel compact circular-polarization (CP) microstrip agile antenna based on Liquid Crystals (LCs) is presented. LC provides the all-in-one solution for such integration approach in terms of high quality dielectric for high performance multiband passive design and increases the peak gain and low insertion loss for GPS antenna. To benefit from LC anisotropy and thus obtaining frequency agility, a bias voltage is applied. The antenna is CP by means of the single feed technique with a truncated segment set to the edge of the patch with two orthogonal pairs of irregular and unsymmetrical slits. The simulated results are compared with experimental data, and good agreement is obtained.