Modeling and Circuit Theory Analysis of Dual‐Band Line Fed Microstrip Patch Antenna for the Application of Wireless Communication

ABSTRACT An equivalent circuit‐based microstrip antenna of dual‐band characteristics has been planned by cutting six vertical rectangular notches of different sizes in this article. The bandwidth of the presented antenna is achieved 23.77% (420 MHz) and 5.46% (137 MHz). The antenna is resonating in dual band at 1.903 and 2.489 GHz with return losses of −35.28 and −23.10 dB, respectively. The suggested antenna structure have frequency band between 1.557 and 1.977 GHz in the lower band and 2.441 and 2.578 GHz in the upper band. The gain of the suggested antenna is 3.760 dBi at 1.903 GHz and 3.803 dBi at 2.489 GHz. The efficiency of proposed antenna is 90% and 89% at both resonating frequencies 1.903 and 2.489 GHz, respectively. However, more than 81% antenna efficiency is observed in both operating bands. The suggested microstrip antenna is fabricated on FR‐4 substrate of size 39.04 × 47.64 mm 2 (0.25 × 0.30 at frequency 1.903 GHz) and excited by microstrip line feed of 50 Ω. The presented design of antenna is validated with measurement and equivalent circuit. The lower resonating band 1.557–1.977 GHz is suitable for GPS (1.575 GHz), GSM 2G (1.8 GHz), and PCS (1.90 GHz). However, upper resonating band 2.441–2.578 GHz is suitable for Bluetooth (2.45 GHz), ISM band (2.45 GHz), and 4G (2.5 GHz) applications.