Compact UWB Bandpass Filter With a Notched Band Using Radial Stub Loaded Resonator

Abstract-The proposed filter satisfies the Federal Communications Commission ultra-wideband (FCC-UWB) specifications and also creates and controls sharp rejection notch-bands within the filter's passband in order to provide interference immunity from unwanted radio signals, such as wireless local area networks (WLAN) and worldwide interoperability for microwave access (WIMAX) that cohabit within the UWB spectrum. This filter is based on CRLH concept consisting of an asymmetric transmission line unit cell with a short circuited inductive stub to realize high performance in an operation band from 3.1 to 10.6 GHz with a very compact size of 16.4 mm × 5.0 mm. The main advantage of the proposed filter is that four notch frequencies are tuned in the UWB frequency band. The notch frequencies of the filter can be changed by increasing the length of the coupling stub which is controlled by using switching matrix equipment (Mini Circuit) instead of PIN diodes. To validate the design theory, a microstrip UWB BPF with four notch bands centered at frequencies 6.18, 5.9, 5.7, and 5.5 GHz is designed and fabricated.

Section: Introductionmentioning

confidence: 99%

Ultra-Wideband Bandpass Filter With Sharp Tuned Notched Band Rejection Based on CRLH Transmission-Line Unit Cell

Ouf¹,

Mohra²,

Abdallah³

et al. 2017

“…However, the existing wireless networks such as 5.8 GHz WLAN signals and some 8.0 GHz satellite communication systems signals can interfere with UWB systems, thus compact UWB BPFs with multiple notched bands are emergently required to reject these interfering signals [11][12][13][14][15][16][17][18][19][20][21]. To achieve a notched band, a pair of radial impedance resonators are used in [11], and a stepped impedance resonator is employed in [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…To achieve a notched band, a pair of radial impedance resonators are used in [11], and a stepped impedance resonator is employed in [12,13]. On the other side, the embedding open-circuited stub is introduced in [14][15][16], and the wave's cancellation theory is proposed in [17,18] to block unwanted existing radio signals.…”

Section: Introductionmentioning

confidence: 99%

Compact Microstrip Uwb Bandpass Filter With Two Band-Notches for Uwb Applications

Peng¹,

Luo²,

Zhao³

2014

Abstract-A new microstrip ultra-wideband (UWB) bandpass filter (BPF) with dual sharply rejected notched bands based on E-shaped resonator is proposed in this paper. The basic UWB BPF is designed using two microstrip interdigital coupled lines and one rectangular patch multiple-mode resonator (MMR). Then, to achieve dual band-notched performance, the proposed dual-mode E-shaped resonator is investigated and coupled to the rectangular patch multiple-mode resonator of the basic UWB BPF. To validate the design theory, a microstrip UWB BPF with two notch-bands centered at the frequencies of 5.8 GHz and 8.0 GHz, respectively, is designed and fabricated. Both simulation and experimental results are provided with good agreement.

“…The frequency spectrum adopted for UWB communication system in this letter, i.e., 3.1-10.6 GHz, follows the one authorized by the Federal Communications Commission (FCC) for short range and high speed wireless communications [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. In [1], a compact UWB BPF was presented based on shorted stubs and defected ground structure (DGS) with dual notched bands while a multimode resonator (MMR) was used for UWB BPF as shown in [2].…”

Section: Introductionmentioning

confidence: 99%

“…Asymmetric feed structures were introduced in [9,10] for notched-bands applications. In [11][12][13], short line, radial stub, and embedded stepped impedance resonator (SIR) were used to create a notched band for avoiding signal interference. Compact UWB BPFs with dual-, triple-, and quad-notched bands were presented in [14,15].…”

Section: Introductionmentioning

confidence: 99%

Novel Band-Notched Uwb Bandpass Filter Using Microstrip/Slotline Ring Resonators

Cui¹,

Zhi²,

Wang³

et al. 2014

Self Cite

Abstract-A novel ultra-wideband (UWB) bandpass filter (BPF) with notched band based on microstrip/slotline ring resonators is presented in this paper. The UWB BPF is fabricated with two microstrip ring resonators on the top copper layer and a slotline ring resonator on the bottom ground layer. Thus, an ultra-wide passband can be achieved owing to the coupling effects and microstrip/slotline transitions of these three ring resonators. Then, a notched band which is created at 8.0 GHz for satellite communication system is designed based on loaded short-circuited stubs. Both the simulated and measured results show that this compact UWB BPF has good performances of wide passband and notched band.