Abstract
The current research work introduces a simple method to realize a circularly polarized patch antenna with 9.52% impedance bandwidth and axial ratio bandwidth. A modified T slot on the ground and offset feeding is used to achieve the required results. The antenna removes the need of complex feeding network for circular polarization and is fed by a microstrip line that makes it a good candidate to be integrated with planar circuits. The proposed antenna covers 2.3–2.53 GHz band with S11 < −10 dB and covers 2.12–2.53 GHz band with axial ratio <3 dB. This antenna is operated on practical 2.4 GHz ISM bands; this frequency band is very useful for wireless LAN, Bluetooth, GPS (IRNSS-1, S-Band), and other applications. The antenna is fabricated and the simulated and measured results are found to be in good agreement.
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