摘要

A compact frequency reconfigurable antenna employing novel composite right/left-hanged (CRLH) transmission line structure is presented. According to the theory of open-ended or short-ended resonators with a CRLH TL, A pin-diode is embedded between the patch and ground. By switching the pin-diode, the antenna can achieve dual-band operation at zeroth-order series and shunt resonances. The antenna is constructed using a Rogers duroid 5880 substrate having the epsilon(r) value equal 2.2 occupies an overall size of 22.8 X 27 X 1.6 mm(3), the working mechanism and radiation performances of the antenna are examined and illustrated for the two operating band.