A Compact Multiband Proximity Coupled Rectangular Microstrip Antenna with Multiple CSRR for Wireless Applications

This article presents the design of compact, multiband proximity coupled rectangular microstrip antenna (PCRMSA) with multiple ring complementary split ring resonator (MCSRR) loaded on the radiating plane. These antennas are proposed for multiband operation by using low cost FR4 dielectric material with antenna size of 35 × 35 × 3.2 mm3. Microstrip antennas with compact size, enhanced bandwidth and multiband operation by using metamaterial have been a candidate for the requirement in various wireless communication applications. Hence, proximity coupled rectangular microstrip antenna with a number of complimentary split ring resonators is proposed. The circular and square shapes have been considered to design the rings. These designs are simulated by using IE3D simulation software version 14.65. The circular and square multiple ring CSRR is considered on the top patch and increasing number of CSRRs has made the study. The measured results show that antenna with six square CSRR on the radiating patch is resonating at seven different frequency points i.e., 1.90 GHz, 5.19 GHz,7.04 GHz, 8.08 GHz, 9.28 GHz, 11.21 GHz and 13.80 GHz, whereas, antenna without CSRR i.e., conventional proximity coupled rectangular microstrip antenna (PCRMSA) is resonating at 5.77 GHz. The virtual size reduction of 68.63% is achieved. These antennas find application in wireless communications.