Design of a Compact Dual-Band Annular-Ring Slot Antenna

Abstract

Abstract-A compact dual-band annular-ring slot antenna (ARSA) is proposed for use in 2.4/5 GHz wireless local-area networks (WLANs). With a meandered grounded strip embedded in the ring slot, three resonant modes were excited. With a pair of notches properly etched in the inner circular patch, the third resonant band was sufficiently lowered so that the second and third resonant bands are combined to form a wider upper operating band. If scaled to the same lower operating-band center frequency, the proposed ARSA measures only 53.6% the area of a conventional microstrip-line-fed ARSA. Measured and simulated results were found to agree reasonably well with each other.

A Compact Uwb Antenna Design Using Rounded Inverted L-Shaped Slots and Beveled Asymmetrical Patch

“…One method is to use different geometries of slots [9][10][11][12][13][14][15][16], and the other techniques use several tuning stubs to achieve wideband performance [17,18]. Among different slot geometries, those worthwhile mentioning are binomial-curve [9], annular-ring [10], fractal [11], rhombus [12], elliptical and circular [13], rectangle [14], triangle [15], and square [16]. The impedance bandwidths of these antennas are less than 104%.…”

A New Triple Band Circularly Polarized Square Slot Antenna Design With Crooked T and F-Shape Strips for Wireless Applications

“…Also the proposed antennas in this paper has the capability of showing CP characteristics in the important standards such as IEEE 802.11b/g (2.4-2.484 GHz), IEEE 802.11a (5. 15-5.35 GHz and an additional band of 5.725-5.825 GHz), and HiperLAN2 (5.47-5.725 GHz) [28,29]. …”

Seven-Band Comb-Shaped Microstrip Antenna for Wireless Systems

“…Throughout the literature survey, different methods to achieve dual-band [1][2][3], tripleband [4][5][6][7][8] and four-band [9,10] have been studied. To generate multiple operating bands, the most popular approach is to introduce slots on radiating patch or ground plane of the antenna or insert strips to a slot antenna.…”

“…To generate multiple operating bands, the most popular approach is to introduce slots on radiating patch or ground plane of the antenna or insert strips to a slot antenna. Annular-ring slot antenna suitable for 2.4/5-GHz dual-band operations with a dimension of 30 mm × 30 mm is proposed in [1]. Chakraborty et al proposed a dual-band microstrip antenna [2] for IEEE 802.11a WLAN application using open-ended slot with slotted ground plane.…”

“…The proposed antenna can operate at seven different frequency bands 1.56-1.64 GHz, 1.76-1.94 GHz, 3.62-3.74 GHz, 4.43-4.48 GHz, 5.02-5.13 GHz, 5.48-5.62 GHz and 5.92-6.02 GHz. The proposed antenna provides maximum number of resonating band compare to the antennas of its class [1][2][3][4][5][6][7][8][9][10].…”