Design of UWB antenna integrated with dual GSM functionalities and dual notches in the UWB region using single branched EBG inspired structure

Abstract

A microstrip line fed planar monopole patch antenna is designed to provide impedance bandwidth (|S11| ≤ −10 dB) of 2.56–12.25 GHz, thus exhibiting ultra‐wideband (UWB) characteristic. Two metallic strips are branched symmetrically from the patch radiator to generate resonant frequencies at 0.9 and 1.9 GHz, corresponding to GSM operating frequencies. A filtering element based on electromagnetic bandgap (EBG) unit cell is placed near the feedline of the antenna to introduce two notches at 5.17 and 7.97 GHz thereby mitigating any interference from lower WLAN and X‐band satellite uplink frequencies respectively. The proposed structure has satisfactory gain at the GSM frequencies and fairly constant gain with a variation of <2 dB in its UWB operating region except at the notch bands. The radiation patterns are stable and symmetric with low cross polarisation. In order to comprehend the novelty of the proposed structure, it is compared with similar structures found in literature in terms of notch generation, achieving extra resonance outside UWB range, compactness, thickness of the substrate, and maintaining consistent gain in UWB region. A prototype of the proposed structure is fabricated and the measured results are in good agreement with the simulated results.

Electromagnetic Band Gap based compact UWB Antenna with Dual Band Notch Response

“…In [11], to notch IEEE-INSAT C-band of 6.5 GHz -7.2 GHz, a new kind of uniplanar EBG was used, and 2-cells uniplanar EBG structures were incorporated on either sides of the antenna feed. In [12], the author proposed line fed UWB monopole antenna with EBG to notch satellite up-link X-band and Lower WLAN. In [13][14], a slitted EBG structure has been proposed to notch WiMAX and WLAN bands, and in [16] [17], Two via Edge Located (TVEL) EBG and a fractal EBG structures are incorporated to achieve 3-different notch bands.…”

Compact Circular-Shaped MIMO Antenna Covers UWB Bandwidth With Four Frequently-Used Band-Notched Characteristics for Multi-Scenario Applications

“…Additionally, the other is to introducing etch slots into the radiating area, the feed line, and the ground [6][7][8][9], which often promotes current to concentrate near slots and suppress the undesired signals. Unfortunately, the mostly of recent UWB antennas merely generate one [10][11], two [12][13] or three notch bands [14][15], which seems that the amount of notch bands is small. Therefore, by introducing more notch bands, the reliability of the communication system can be sustained well, thereby reducing the effect of more interference signals.…”

Upper Wlan Band Notched Uwb Monopole Antenna Using Compact Two via Slot Electromagnetic Band Gap Structure

“…Recently, many authors have proposed the use of EBG structures near the feed line of the monopole antenna to reject the interfering bands in the UWB spectrum with minimal effect on the radiation properties of the antenna [16][17][18][19][20][21][22][23][24][25]. In [16], four CMT EBG structures are placed near the feed line of circular-shaped UWB monopole antenna to obtain band notch at the center frequency of 5.5 GHz.…”

“…In [22], a novel uniplanar EBG structure is proposed, and two cells of this uniplanar EBG structure are placed on both sides of the feed line of the UWB antenna to notch IEEE INSAT applications C-band, i.e., from 6.5 to 7.2 GHz. EBG structures are also used in [23], to notch Lower WLAN and satellite uplink X-band from the operating bandwidth of microstrip line fed UWB monopole antenna. Recently, in [24], a slitted EBG structure has been proposed to notch WiMAX and WLAN bands, and in [25], a fractal EBG structure and Two Via Edge Located (TVEL) EBG structures are employed to notch three different bands.…”