Frequency Reconfigurable Antenna Designs Using PIN Diode for Wireless Communication Applications
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In this paper a compact reconfigurable antenna with switchable slot is designed and proposed, the slot is etched on the rectangular patch and inclusion of PIN diode which is used to switch the slot in ON and OFF states, the patch is fed by a probe coaxial (50 Ω), this type of antenna permits to have multiple frequencies. In this study, it is observed that frequency diversity can obtained by controlling the bias voltage with unchanged antenna, unchanged feeding probe and unchanged geometric shape of the patch, the thing that was not previously feasible of the unslotted patch antenna. The results in terms of return loss and radiation pattern are given and good performances are obtained and show that the proposed antenna operates at different frequencies which can be used for several applications, especially in wireless communication systems, according to the bias voltage and the location of the slot.
KeywordsReconfigurable antenna Switchable slot Frequency diversity PIN diode
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