Rhombic slot antenna design with a pair of straight strips and two ∩‐shaped slots for WLAN/WiMAX applications

Abstract

A novel multiband rhombic slot antenna with a truncated corner is proposed for wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications simultaneously. By introducing a pair of straight strips and two etched ∩‐shaped slots, the proposed antenna can operate in multibands. The prototype of the proposed antenna has been successfully constructed and tested. The 10 dB return loss bandwidths of them are 550 MHz (3.15–3.70 GHz) and 920 MHz (5.05–5.97 GHz), respectively, which can cover both the WLAN bands (5.15–5.35 GHz and 5.725–5.825 GHz) and the WiMAX bands (3.4–3.6 GHz and 5.25–5.85 GHz). In addition, good monopole‐like radiation characteristics with sufficient antenna gains are obtained over the operating bands. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1466–1469, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26837

A Compact Microstrip Slot Antenna With a Pair of Inverted L-Strips and Elliptical-Arc-Shaped Stub for Wlan/Wimax Applications

“…Compared to many antennas proposed in recent papers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15], this antenna is designed based on a rather simple structure and suitable for all the WLAN/WiMAX frequency bands. By introducing a pair of symmetrical inverted L-strips and an elliptical-arc-shaped stub, the proposed antenna can generate two separate resonances at 3.5 and 5.5 GHz, while the trapezoid and ellipse slot on the ground plane is to excite the lowest resonant mode.…”

“…The geometry of the proposed antenna along with its design parameters is shown in Figure 1 is only L × W mm 2 , which is less than the antennas presented in [5][6][7][8]. The antenna is fed centrally at one side of the substrate by a 50-Ω microstrip feed line which has a width of W 1 and is joined to a circular patch having a radius of R. As mentioned earlier, in order to achieve a multiband antenna, a pair of symmetrical inverted Lstrips is embedded in the trapezoid and ellipse slot.…”

“…Owning to these merits, several promising types of dual-band and multiband antennas have been reported in the recent literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. For example, many printed monopole antennas with different shapes have been presented, including a printed symmetrical Gshaped antenna [1], a printed double-T-shaped antenna [2], an Lshaped and E-shaped antenna [3], and a planar antenna with a shorted parasitic inverted-L wire [4].…”

“…However, none of the above available designs can achieve a dual-band response with sufficiently large bandwidth to cover the whole WLAN/WiMAX bands. To enhance the bandwidth, there are many other triple-band antennas for both WLAN/WiMAX applications, such as a CPW-fed antenna with two thin bent slots [5], a slot antenna with a triangular split-ring resonator [6], a printed rectangular ring antenna with a straight strip and a meandered strip [7], and a rhombic slot antenna with a pair of straight strips [8]. Unfortunately, although these antennas exhibit the advantages of simple structure and wide bandwidth, they have a large overall size for the limited space of a portable device which possibly degrades their availabilities for practical engineering applications.…”

Acs Feed Compact Multiband Antenna for Personal Wireless Communication Applications

“…Antennas, an integral part of such wireless communication systems, are subjected to very stringent specifications such as light weight, compact structure, low profile, robustness and conform-ability and are expected to grab as much spectrum as possible to provide multi-band or broadband operation [1][2][3][4]. The design of several multi-band antenna satisfying some of these specifications have been reported in [5][6][7][8][9][10]. However, integration of these antennas with RF-MIC circuits with limited access to only service in WiMAX/WLAN frequency bands is a difficult task.…”