A Compact Double -Band Short-Ended Zeroth Resonator Antenna Featuring Backed Ground Plane to Enhance Bandwidth and Radiation Efficiency

Authors- G. Rakesh Reddy, Assistant Professor S. Thirupathamma, P. Durga Prasad, CH. Siva Sanjay, B. Hari Kishor

Abstract-This paper mainly represents a compact planar dual-band short-end metamaterial antenna with a backed ground plane that enhances the antenna’s bandwidth and radiation characteristics. The proposed dual-band metamaterial antenna (MTM) is based on the concept of composite right-handed or left-handed transmission line (CRLH-TL). Here, a reserved ground plane is used to create additional coupling capacitance (CC) to shift the ZOR frequency to a lower band while improving ZOR matching and increasing the impedance bandwidth of higher-order modes. In this proposed MTM antenna, an interdigital capacitance (IDC) is used instead of a simple series gap, and the higher-order impedance bandwidth is lower for second-band Worldwide Interoperability for Microwave Access uses which has a range of (3.3-3.7 GHz) Wi-MAX applications. Since the proposed antenna provides short-end MTM, the ZOR frequency is controlled by a set of lumped LC parameters. The suggested antenna delivers dual-band functionality, exhibiting a measured -10 dB impedance bandwidth of 5.57% at 2.62 GHz and 41.61% at 4.54 GHz, respectively. The total electrical size of the designed antenna is 0.225λ0 x 0.144 λ0 x 0.0144 λ0 at ZOR (f0 =2.70 GHz). where λ0 is taken as free space wavelength. Therefore, it can be applied to various Wi-MAX application bands (2.5~2.7GHz/3.3~3.8GHz). Moreover, the proposed dual-band metamaterial antenna offers small size, low loss, stable gain and radiation efficiency, and also provides multidirectional radiation pattern in E-plane and dipolar radiation pattern in H-plane, respectively.

DOI: /10.61463/ijset.vol.12.issue2.147