beam steering mushroom-like EBG 4G (LTE) E-plane radiation patterns control HW-LWA array HWMLWA LWA SPDT switch T-resonator balun broadband antenna control beam scanning control cell control radiation pattern conversion loss coupled-line crack detection; microwave sensor; symmetrical split ring resonator (SSRR) diode mixer double gap electromagnetic band-gap (EBG) electromagnetic band-gap EBG internally distributed antenna systems (IDAS) leaky wave antenna (LWA) matching stubs material characterization materials characterization microsensors microwave resonators microwave sensor mobile communications monopole antenna planar sensor power divider steering antennas switchable EBG switchable function switching transmission line resonator transmission line technique triple band EBG ultra-wideband