A Semi-Circle-Shaped Aperture UWB Antenna With Triple Band-Notched Character

Abstract

A novel semi-circle-shaped aperture ultrawideband (UWB) antenna with triple band-notched characteristics is proposed, to prevent interference problems due to existing nearby communication systems within the UWB operating frequency. The band-notches are realized by etching one complementary split-ring resonator (SRR) inside a circular exciting stub on the front side, employing a interrogationshaped defected ground structure (DGS) in each side of the ground plane as well as symmetrically adding a pair of open-circuit stubs at the edge of the slot. Tri-band rejected filtering properties in the WiMAX/WLAN are so achieved. Experimental results show that the designed antenna, with compact size of 24×30 mm 2 , has an impedance bandwidth of 2.6-12 GHz for VSWR less than 2, except three frequency stop-bands of 3.3-4, 5.15-5.4 and 5.8-6.1 GHz. Moreover, the antenna has good omnidirectional radiation patterns in the H plane. Besides, time-domain behaviors and the band-notched structures are discussed in detail.

Study of an Extremely Wideband Monopole Antenna With Triple Band-Notched Charactersistics

“…However, these slot layouts can provide only one notched bands, and hence their practical applications are limited. Recently, some designs with the characteristics of a dual notched band [24][25][26][27][28][29][30][31][32][33] and even a triple notched band are presented [34][35][36].…”

Design and Analysis of Planar Ultra-Wideband Antenna With Dual Band-Notched Function

“…The results in [32] and [35] demonstrate acceptable band-notched performances in the simulation but limited band-notched performance in the measurement due to the dielectric loss of the substrate. The VSWR of the bandnotched antennas reported in [25,[29][30][31], and [34] is below 10 at notched frequencies. Furthermore, Table 2 demonstrates the gain suppression comparison between the proposed band-notched design and other band-notched antennas.…”

“…This design can provide the capability of avoiding the interferences with both the lower and higher WLAN bands by adjusting the lengths of the included parasitic strips. Some other multiple band-notched antennas have already been investigated in achieving dual or triple bandnotched UWB antennas [25][26][27][28][29][30][31][32][33][34][35][36]. The band-notched performance can be characterized in terms of VSWR and gain suppression at notched frequencies.…”

Compact CPW‐fed ultra‐wideband printed antennas with controllable notch characteristics

“…Over these years, lots of domestic and abroad experts and scholars have bent themselves to the antennas that exhibit a notch characteristic. Although several methods have been proposed, etching various shapes of slits on the radiation patch is one of the most simple and practical implementation methods, such as hat‐shaped C‐shaped, and SRR or CSRR shaped . Besides, Zhou Yang introduces an antipodal vivaldi antenna by adopting resonant parallel strip (RPS) to reject an unwanted narrow band .…”