Miniature dual-band and wideband antennas based on printed circuit emulation of anisotropy

Several dual-band and wideband miniature antennas were introduced by harnessing the controllable dispersion properties of layered anisotropic media. A key aspect of the design is the emulation of anisotropy using printed coupled lines with lumped loads. Exciting the resonances of two closely spaced K-ω branches resulted in a miniature coupled double loop (CDL) antenna having λo/9.8 x λo/9.8 x λ<;/39.4 footprint and 2.65% bandwidth. As such, the CDL antenna exhibits 49% smaller footprint and 8% larger bandwidth than a standard patch antenna. We demonstrated that miniature CDL antennas can achieve much wider bandwidths (14.7%) when printed on thicker (λο/lθ.l) substrates. Also, a λο/θ x λo/9 miniature dual-band CDL antenna was presented for LI and L2 band GPS applications. Implementations and measurements of various designs are underway and will be presented at the conference.