Compact Triple-Band Slot Antenna for Wireless Communications

Abstract

Abstract-This paper presents a compact microstrip-fed slot antenna with triple-frequency operation. The proposed antenna structure consists of a cross-shaped microstrip feed line and multiple openended slots on the ground plane. By properly selecting shapes and dimensions of these embedded slots, the triple-resonance situations at 2.4/3.5/5.8 GHz are obtained. Meanwhile, the cross-shaped feedline with shorting pin makes a joint benefit to adjust the matching condition and impedance bandwidth. The numerical and experimental results exhibit the designed antenna operates over triple frequency ranges and covers numbers of useful frequency bands for present wireless communication systems. In addition, acceptable radiation characteristics are obtained over the operating bands.

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

“…Figure 5 shows the results of the simulated return losses of the proposed antenna with different parameters of the CRLH-TL unit cell. As expected, L 2 and L 3 mainly affect the operating frequencies f 3 , f 4 and f 5 generated by different parts of the CRLH-TL unit cell and also have a great effect on f 7 In order to further demonstrate the operation mechanism, surface current distributions on the whole proposed antenna at the resonant frequencies are shown in Figure 6. It can be clearly seen that the current has different distributions along the antenna in different resonant frequencies.…”

“…Many kinds of multi-band antenna have been designed for the wireless local area network (WLAN) application in the 2.4 GHz (2.4-2.484 GHz)/5.2 GHz (5.15-5.35 GHz)/5.8 GHz (5.725-5.825 GHz) operating bands or the worldwide interoperability for microwave access (WiMAX) application in the 2.5 GHz (2.5-2.69 GHz)/3.5 GHz (3.3-3.8 GHz)/5.5 GHz (5. 25-5.85 GHz) operating bands, such as monopole antenna with multiple resonance strips [2,3] or parasitic elements [4,5], slot antenna [6,7], PIFA [8], fractal antenna [9], and dipole antenna [10][11][12], etc.. Although a great variety of studies about multiband antenna meeting the demands of WLAN or WiMAX applications have been reported, the subject about quad-band antenna for Compass B3 (1.256-1.278 GHz) or GPS, WiMAX and WLAN applications is seldom proposed.…”

A Compact Dual-Band Printed Monopole Antenna for Wimax/Wlan Applications

“…As one of the most important devices, multi-band antenna has attracted much interest. To cover desirable bands and reduce the size, various promising antennas, such as printed monopole antenna [1][2][3][4][5], CPW-fed antenna [6,7], slot antenna [8][9][10], inverted-F antenna [11], have been proposed. For example, an printed monopole antenna of size of 38 × 25 mm 2 was developed in [1], its triple-band operation was achieved by a circular ring, Y-shape-like strip and a defected ground plane.…”