A dual band-notched UWB antenna with hook-shaped slots and folded stubs

Abstract

Abstract:A novel planar antenna with WiMAX and WLAN bandnotched characteristics is presented for ultra-wideband (UWB) applications. The UWB antenna consists of a staircase-shaped radiating element, a microstrip feedline and a modified ground plane. To realize WiMAX band-notched characteristic, a pair of hook-shaped slots is etched on the radiating element. Two folded stubs extending from the ground plane are used to reject the WLAN band for the first time. The antenna meets a bandwidth from 2.95 to 11.6 GHz, with two notchedbands of 3.25-3.95 GHz (WiMAX) and 5.00-6.50 GHz (WLAN), respectively. Measured and simulated results of the impedance bandwidth, gain, and radiation patterns are presented and discussed.

A compact filtering UWB antenna with band-notched function

“…The design of notch frequency can be adjusted by controling the current patch on the microstrip line, which is more simple and convenient. The size of the proposed antenna is 24 mm  12 mm, which is smaller than that of the relevant works in [2,4,6,7,8,9,10,11,12,13,14,15,16]. The ratio of the −3 dB bandwidth to the −10 dB bandwidth is 1.038, which is very close to 1.…”

“…Hence, a UWB antenna with filter function is of great importance in reducing both the size and cost of the UWB system. To the best of our knowledge, most of the UWB antenna designs focus on the minimization technology [5], band-notched characteristics [6,7,8] and other antenna performances, such as high gain and wide bandwidth [9,10,11]. However, the band-edge selectivity and the size of these antennas are not satisfactory.…”

“…Although the shape factor is reduced to 1.078 [12] and 1.08 [13], the size of the antenna is 53 mm  22 [12] and 53 mm  42 mm [13], which are still relatively large. For in-band interference, the antenna usually uses slot [7,8,14] or parasitic structure [15]. In [16], Wong et al proposed a planar filtering UWB antenna with four shorting pins to achieve desired selectivity properties, and the size is compact with an overall dimension of 28:5 mm  28 mm.…”