A frequency-reconfigurable antenna is proposed for WiMAX applications. It is composed of a metasurface and a slot antenna. The metasurface consists of isosceles triangular unit cells with a large ...

In this letter,a circularly-polarized (CP) metal-tolerant tag antenna with a long reading distance (RD) is proposed for the ultra-high frequency (UHF) radio-frequency identification (RFID) systems. In ...