Design and Analysis of CPW-Fed Antenna for Quad-Band Wireless Applications

Abstract

In this article, the author proposes and designs a multi-band coplanar waveguide (CPW)-fed Om-shaped (ॐ) antenna on an FR4 substrate with dimensions of 80 × 80 × 1 mm³. The proposed antenna has a quad-band, and operates with four resonance frequencies (f_r) at f_r1 = 2.96 GHz, f_r2 = 3.85 GHz, f_r3 = 4.40 GHz, and f_r4 = 5.50 GHz, for S-band, IMT band, C-band, and Wi-Max-band applications respectively. The impedance bandwidth (IBW) of the proposed antenna confirmed reflection coefficients of less than − 10 dB, (S₁₁ ≤  − 10 dB) was 60 MHz (2.93–2.99 GHz), 90 MHz (3.80–3.89 GHz), 130 MHz (4.35–4.48 GHz), and 110 MHz (5.44–5.55 GHz), respectively, for quad-band applications. The proposed antenna has a gain of 2.2 dBi, 11.8 dBi, 11 dBi, and 9.4 dBi, respectively, at the resonant frequencies of 2.96 GHz, 3.85 GHz, 4.40 GHz, and 5.50 GHz. The antenna has been designed and simulated by using computer simulation tool (CST) software, which established a good agreement between the measured and simulated results. The results are compared with reported work, and the proposed geometry provides a multiband with good IBW for wireless applications.