Abstract
A dual band rectangular microstrip patch antenna is proposed with novel defects introduced in the ground plane. Initially a plain rectangular microstrip antenna is designed which is resonant at 5.2 GHz i.e. the first WLAN band. With the introduction of two spiral angular defective ground structure, the microstrip antenna is found to be resonant simultaneously at 2.4 GHz i.e. the Bluetooth band and 5.8 GHz i.e. the second WLAN band. The different parameters of the microstrip antenna, such as the return loss, gain and impedance variations are extensively studied. Thus the proposed microstrip antenna behaves as compact, as well as a dual frequency band operated antenna.
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