A Compact Slotted Microstrip Multiband Patch Antenna

Abstract

Our project “Compact Slotted Microstrip Multiband Patch Antenna “aims to incorporate design of a multiband antenna with slotted monopole patch for wireless communication. The designed antenna makes use of open complementary split-ring resonators (OCSRRs) to obtain multiple bands covering Wi-Max (3.3-3.8GHz), Wi-Fi (4.9-5.9GHz) and PAN (2.4-2.48GHz) however the PIN diodes can be used depending upon their ON and OFF state, acting as a series or parallel RLC circuit to provide reconfigurability. The OCSRRs act as high impedance elements at their resonant frequencies when modeled as parallel circuit. Multiple operative sections can be attained in the monopole patch of the antenna by placing the OCSRRs at calculated distance. The principal operating frequency of the fabricated antenna is proportional to the length of the patch while the additional resonance frequencies are determined by their distance from OCSRRs. Use of coplanar waveguide structure optimized the design by making it easy to fabricate and compact which made it facile to integrate with other devices to meet the modern day communication requirements. All frequency bands exhibit similar radiation characteristics. The final results obtained are consistent with the simulated data and a good return loss with positive gain of the antenna is observed. The antenna can be made reconfigurable by using PIN diode in OFF or ON state to convert operation of antenna from triple band to dual band.