Frequency Reconfigurable Multiband Microstrip Antenna Composed of Artificial Magnetic Conductor

This paper presents the design and characterization of frequency-reconfigurable multiband microstrip antenna which is composed of artificial magnetic conductor (AMC). The use of AMC is aimed to generate other resonant frequencies so as to get a multiple band frequency response. In order to reconfigure the frequency response of the antenna, some varactor diodes of BB837 type were incorporated into the AMC structure which was made by ring resonators. The results show that the proposed microstrip antenna can produce multiband frequency responses with the fixed resonant frequency at 1.975 GHz and the reconfigurable one between 1.65 GHz to 1.7 GHz.