Abstract
novel design of a Frequency Reconfigurable patch antenna which has applications in the L- Band, namely, radars, GPS, telecommunication system and aircraft surveillance is presented in this paper. The antenna having dimensions of 34.45mm x 45.64mm has been designed using Ansys HFSS. It is a microstrip line inset fed patch antenna with square concentric rings as Defected Ground Structure (DGS) and FR-4 as the substrate. Two PIN diodes, BAR 63-02V, have been used on the ground plane to carry out switching in the frequency domain. The simulated results depict the frequency shift from 1.612 MHz to 1.815 MHz for different combinations of PIN diodes while keeping the radiation patterns intact. The simulated S11 values are well below the – 10dB value in all the four combinations. The average impedance bandwidth obtained is 400 MHz. The measured results on the fabricated antenna using Vector Network Analyzer are in close approximation to the simulated results.
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