Design of CSRR-based multiband triangular patch antenna for Wireless Applications

Wireless communication has become an integral part of our daily lives as technology has advanced. The majority of electronic devices are equipped with wireless operability support. With the rapid progression of multifunctional communication gadgets, devices can now function across multiple frequency bands. Multi-band antennas are required for resonating in more than one frequency band. Wideband antennas can resonate over broader frequency bands, but their impedance bandwidth and gain are inadequate. As a result, compact multiband antennas might be the solution. This paper proposed a triangular-shaped patch antenna in which a triangular split ring resonator is engraved on it. FR4 substrate is utilized in this work. The projected antenna resonates at 3.5 GHz, 7.7 GHz, and 9.3 GHz with a gain of 3.93 dBi, 3.87 dBi, and 4.47 dBi.