Characterization of Broadband Antenna Based on FR-4 Substrate Material

• Published in: Materials today : proceedings Vol. 12; pp. 628 - 635
• Main Authors: Singh, Sandeep Kr, Sharan, Tripurari, Singh, Arvind Kr
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2019
• Subjects: Axial-Ratio Bandwidth (AR−BW); Circularly Polarized (CP); Coplanar Waveguides (CPW); Flame Retardant and Type 4 (FR−4); International Mobile Telecommunication (IMT); VSWR; VSWR; Circularly Polarized (CP); International Mobile Telecommunication (IMT); Axial-Ratio Bandwidth (AR−BW); Coplanar Waveguides (CPW); Flame Retardant and Type 4 (FR−4)
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2019.03.107

A simple and compact design of a coplanar waveguide (CPW)-fed broadband square patch antenna is introduced. The proposed broadband antenna is printed on a single-layer PCB with a pair of T-match like symmetric structure which acts as tuning stubs and L−shaped fed-transmission line. The antenna occupies a small radiating area 27.1×8.4 mm2 is demonstrated on an FR−4 substrate PCB with relative permittivity (εr) 4.3, and loss tangent (tan δ) 0.02 and thickness 0.76 mm. The ground plane area of the antenna is 60×60 mm2 with 50Ω CPW-fed line. The designed antenna achieved impedance bandwidth of 100.7%, (1.244 to 3.771) GHz and axial-ratio bandwidth 20.6%, (2.649 to 3.257) GHz respectively, with a return loss <-10 dB (VSWR <2), and axial ratio less than 3−dB respectively. The antenna is simulated using CST V.17 EM Simulator, and the performance of the antenna parameters like return loss, VSWR, axial ratio bandwidth (AR−BW), radiation pattern and surface current density is improvised to an acceptable limit. The analysis of results thus achieved so many similarities between the measured and simulated results