Dual band ACS-Fed with Loop resonator Antenna for GPS / WLAN Applications

In this article, an asymmetrical coplanar strip (ACS) fed for dual band radiation is used to construct a new tiny printed antenna with dimensions of 21.57× 25.62× 1.6 mm3 on FR4 substrate. The Proposed antenna consists of a ground plane, monopole, and loop resonator that are fed via the ACS Technique. The radiating element has centre frequencies of 1.23 GHz and 2.73 GHz, respectively, with a -10 dB impedance bandwidth of 1180 MHz (1.18-1.26 GHz) and 2550 MHz (2.55-2.94 GHz). For achieving antenna size reduction, ACS-fed applied with monopole provides topmost resonant frequency at 2.73 GHz and loop resonator generates bottom resonant frequency at 1.23GHz. A prototype antenna has a considerable radiation pattern and is suited to the Global Positioning System (GPS) and Wireless Local Area Network (WLAN).

I. Introduction

In latest wireless communication technology upgrades the high performance of the antenna like low profile, size miniaturization and radiation characteristics [1]. In this process, designing a dual -band antenna is a key component for realizing the radiation characteristics of the proposed antenna [2]. It offers the better size reduction, which is compared with conventional planar antennas for GPS/ WLAN applications [3]. The ACS-fed has been yielded to acquire impedance matching and offers dual band radiation. The designed loop resonator has significant advantages of compact size, cost effective including better reflection coefficient characteristics [4]. The rectangular loop is used to build the dual - band (lower and upper) resonances with suitable radiation characteristics [5]. The designed antenna has a compact size of 21.57mm × 25.62 mm × 1.6mm which is fabricated on a inexpensive FR-4 (Flame Retardant-4) substrate with a 4.4 dielectric constant [6]. Fig 1:

Design configurations