CSRR Loaded Tunable L-Strip Fed Circular Microstrip Antenna
A tunable L-strip fed circular microstrip antenna on thick substrate with CSRR in the ground plane has been analysed and investigated. The antenna is analysed using cavity model and circuit theoretic approach for initial design and then simulated on IE3D simulation software. The antenna is made tunable with PIN diode which makes it to work in different configurations. Two diodes were used to implement a double annular slot, one annular slot and one split slot and CSRR in the ground plane. While other configurations of diodes provide bandwidth and radiation pattern diversity, CSRR provides size reduction of upto 13.31% along with high gain directivity and radiation efficiency. A maximum gain of 8dBi, directivity 8.3dBi has been achieved in the respective band of operations. The antenna exhibits wideband along with multiband characteristic.
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