Design of an Edge-Fed Quad-Band Slot Antenna for GPS/Wimax/Wlan Applications

Abstract

In this letter, a novel compact quad-band microstrip circular slot antenna using edge-feeding is proposed to support the four wireless communication bands of GPS1.575 (1.525-1.625 GHz), WIMAX3.5 (3.3-3.6 GHz), WLAN2.45 (2.4-2.485 MHz)and WLAN5.2/5.8 (5.15-5.825 GHz). To expand the bandwidth of the GPS band and induce the WIMAX/WLAN band to support quad-band applications without affecting the compactness of the proposed antenna, a good method of implanting two T copper slices at the inner boundary of the two circular slots respectively is adopted. By adjusting the diameter of the two circular slots and the size of the T-shaped patch, resonant frequencies and bandwidth of the antenna are controlled and the multiple operating bands are achieved. In order to further reduce the size of the antenna that an edge-fed technology is used. This antenna has a simpler structure for realizing quad-band characteristics. Then, a prototype of the proposed antenna was successfully implemented, and good radiation performance is observed in all desired bands.

Design of a Compact Quad-Band Hybrid Antenna for Compass/Wimax/Wlan Applications

“…Although the proposed antenna is realized with a relatively compact size, it still provides competitively enhanced bandwidths covering the Compass B3, 2.5/3.5/5.5 GHz WiMAX and 5.2/5.8 GHz WLAN bands. The gain of the first mode (resonant frequency) is larger than reference [13] and [15]. Moreover, it is easy to be fabricated and low cost owing …”

“…The performances of the proposed antenna are compared with those of the recently reported antennas [13][14][15]26] for the Compass or GPS, WLAN and WiMAX applications in Table 1. Although the proposed antenna is realized with a relatively compact size, it still provides competitively enhanced bandwidths covering the Compass B3, 2.5/3.5/5.5 GHz WiMAX and 5.2/5.8 GHz WLAN bands.…”

“…In [13], a paper-based inkjetprinted tri-band U-slot monopole antenna is proposed to cover the GPS/WiMAX/WLAN, but gain of the lowest frequency for GPS is only −6 dBi. In [14] and [15], two slot antennas are presented to support quad-band operation for GPS/WiMAX/WLAN applications. But they also have the drawbacks of large size and complicated structures with double metallic layers.…”

A Novel Circular Slot Antenna With Two Pairs of T-Shaped Slots for Wlan/Wimax Applications

“…Though the oval-ring slot antenna reported in [11] can meet the requirement for WLAN and WiMAX simultaneously, it has a large size. The circular slot antenna studied in [12] has a much more complex structure for practical engineering applications.…”

“…In order to satisfy the IEEE 802.11 WLAN standards and the WiMAX standards simultaneously, multiband antennas with large impedance bandwidth and planar structure are required. For this, several types of antennas have been proposed for WLAN/WiMAX applications, such as planar inverted-F antennas (PIFAs) [1][2][3], monopole antennas [4][5][6][7], and slot antennas [8][9][10][11][12]. The PIFA antenna provides many desirable characteristics such as multiband operation and compact size while it has a complex structure and its 3D structure may be challenging in fabrication.…”