scholarly journals A Compact Wideband SIW Bandpass Filter with Wide Stopband and High Selectivity

Electronics ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 440 ◽  
Author(s):  
Huang ◽  
Yuan
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Cutoff Frequency ◽  
Ring Resonators ◽  
Fractional Bandwidth ◽  
Split Ring ◽  
Electromagnetic Band Gap ◽  
Compact Size ◽  
Novel Method ◽  
Good Agreement

A novel method to design a wideband substrate integrated waveguide (SIW) bandpass filter (BPF) with compact size, wide stopband and high selectivity is presented. In this method some unique electromagnetic band-gap (EBG) cells are periodically etched on the top layer of SIW to realize a wide passband propagating below the equivalent waveguide cutoff frequency. By changing the configuration of EBG cells, undesired harmonics in upper stopband can be suppressed and a wideband BPF with wide stopband can be obtained. By symmetrically loading two complementary split ring resonators (CSRRs) on the tapered gradient lines of the input/output ports, a transmission zero near the passband can be introduced, and it makes the frequency selectivity of upper sideband improve significantly. As a verification, a wideband SIW BPF with a 3.02 GHz absolute bandwidth (ABW) and a 64.7% fractional bandwidth (FBW) centered at 4.67 GHz is designed, simulated, manufactured, and measured. The results of the experiment and simulation are in good agreement.

A compact UWB antenna with triple band notch reconfigurability

2020 ◽  
pp. 1-7
Author(s):  
Lei Li ◽  
Jingchang Nan ◽  
Jing Liu ◽  
Chengjian Tao
Keyword(s):  
Coplanar Waveguide ◽  
Ring Resonators ◽  
Uwb Antenna ◽  
Split Ring ◽  
X Band ◽  
Compact Size ◽  
Nested Structure ◽  
P Type ◽  
Good Agreement ◽  
Triple Band

Abstract A compact ultrawideband (UWB) antenna with reconfigurable triple band notch characteristics is proposed in this paper. The antenna consists of a coplanar waveguide-fed top-cut circular-shaped radiator with two etched C-shaped slots, a pair of split-ring resonators (SRRs) on the backside and four p-type intrinsic n-type (PIN) diodes integrated in the slots and SRRs. By controlling the current distribution in the slots and SRRs, the antenna can realize eight band notch states with independent switch ability, which allows UWB to coexist with 5G (3.3–4.4 GHz)/WiMAX (3.3–3.6 GHz), WLAN (5.15–5.825 GHz), and X-band (7.9–8.4 GHz) bands without interference. By utilizing a nested structure of C-shaped slots and SRRs on the backside, a compact size of 18 × 19.5 mm2 is achieved along with multimode triple band notch reconfigurability. The antenna covers a bandwidth of 3.1–10.6 GHz. A prototype is fabricated and tested. The simulated and experimental results are in good agreement.

scholarly journals A Novel SWB Antenna with Triple Band-Notches Based on Elliptical Slot and Rectangular Split Ring Resonators

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 202 ◽  
Author(s):  
Xiaobo Zhang ◽  
Saeed Ur Rahman ◽  
Qunsheng Cao ◽  
Ignacio Gil ◽  
Muhammad Irshad khan
Keyword(s):  
Split Ring Resonator ◽  
Ring Resonators ◽  
Impedance Bandwidth ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Compact Size ◽  
Good Agreement ◽  
Swb Applications ◽  
Triple Band ◽  
Microstrip Feed

In this paper, a wideband antenna was designed for super-wideband (SWB) applications. The proposed antenna was fed with a rectangular tapered microstrip feed line, which operated over a SWB frequency range (1.42 GHz to 50 GHz). The antenna was implemented at a compact size with electrical dimensions of 0.16 λ × 0.27 λ × 0.0047 λ mm3, where λ was with respect to the lowest resonance frequency. The proposed antenna prototype was fabricated on a F4B substrate, which had a permittivity of 2.65 and 1 mm thickness. The SWB antenna exhibited an impedance bandwidth of 189% and a bandwidth ratio of 35.2:1. Additionally, the proposed antenna design exhibited three band notch characteristics that were necessary to eradicate interference from WLAN, WiMAX, and X bands in the SWB range. One notch was achieved by etching an elliptical split ring resonator (ESRR) in the radiator and the other two notches were achieved by placing rectangular split ring resonators close to the signal line. The first notch was tuned by incorporating a varactor diode into the ESRR. The prototype was experimentally validated with, with notch and without notch characteristics for SWB applications. The experimental results showed good agreement with simulated results.

scholarly journals A New Ultracompact Narrow Bandpass Microstrip Filter Using Double-Negative Quasiplanar Cells

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Mohammad Reza Khawary ◽  
Vahid Nayyeri ◽  
Seyed Mohammad Hashemi ◽  
Mohammad Soleimani
Keyword(s):  
Printed Circuit Board ◽  
High Selectivity ◽  
Bandpass Filter ◽  
Circuit Board ◽  
Center Frequency ◽  
Double Negative ◽  
Fractional Bandwidth ◽  
Printed Circuit ◽  
Full Wave ◽  
Good Agreement

This paper presents a novel ultracompact narrow bandpass filter with high selectivity. The proposed filter is composed of cascading two basic cells. Each cell is basically a microstrip line loaded with a quasiplanar resonator and series gaps which can be fabricated using a standard multilayer printed circuit board technology. The structure is analyzed through an equivalent circuit and full-wave simulations. The simulation results are compared with experimental measurements demonstrating a good agreement between them. The measurement indicates that the realized bandpass filter at the center frequency of 1 GHz has a fractional bandwidth of 2.2%. Most importantly, in comparison with other similar recent works, it is shown that the proposed filter has the smallest size.

scholarly journals Quadruple-Mode Wideband Bandpass Filter with Improved Out-of-Band Rejection

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 300 ◽  
Author(s):  
Musab Hameed ◽  
Gaobiao Xiao ◽  
Ali Najam ◽  
Lina Qiu ◽  
Tayyab Hameed
Keyword(s):  
Rectangular Waveguide ◽  
Bandpass Filter ◽  
Transverse Magnetic ◽  
Center Frequency ◽  
Fractional Bandwidth ◽  
Compact Size ◽  
Coaxial Lines ◽  
Good Agreement

This paper proposes a method for designing a quadruple-mode wideband bandpass filter using off-centered perturbed metallic cylinders in a rectangular waveguide cavity with compact size and improved out-of-band rejection. Two off-centered perturbation cylinders were placed at the bottom of the rectangular waveguide cavity along with a pair of perpendicularly-fed coaxial lines, which excited four quasi-transverse magnetic (TM) modes to realize the desired passband. The height of the waveguide cavity and the shape of the perturbation cylinders were exploited to achieve an all quasi-TM modes filter with good out-of-band rejection and sharp skirt selectivity. The proposed filter operates at 2.93 GHz center frequency with 38% wide fractional bandwidth (FBW). The proposed filter is fabricated using aluminum. The measured and simulated results are in good agreement with each other.

scholarly journals High Selectivity Dual-Band Bandpass Filter with Tunable Lower Passband

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Wei-Qiang Pan ◽  
Xiao-Lan Zhao ◽  
Yao Zhang ◽  
Jin-Xu Xu
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Bandpass Filters ◽  
Dual Band ◽  
Transmission Zeros ◽  
Resonant Modes ◽  
Novel Method ◽  
Good Agreement ◽  
Tunable Bandpass Filter

This paper presents a novel method to design dual-band bandpass filters with tunable lower passband and fixed upper passband. It utilizes a trimode resonator with three controllable resonant modes. Discriminating coupling is used to suppress the unwanted mode to avoid the interference. Varactors are utilized to realize tunable responses. The bandwidth of the two bands can be controlled individually. Transmission zeros are generated near the passband edges, resulting in high selectivity. For demonstration, a tunable bandpass filter is implemented. Good agreement between the prediction and measurement validates the proposed method.

scholarly journals A Compact Planar Low-Pass Filter Based on SRR-Metamateria

2018 ◽  
Vol 8 (6) ◽  
pp. 4972
Author(s):  
Badr Nasiri ◽  
Ahmed Errkik ◽  
Jamal Zbitou ◽  
Abdelali Tajmouati ◽  
Larbi El Abdellaoui ◽  
...  
Keyword(s):  
Cutoff Frequency ◽  
Total Surface Area ◽  
Ring Resonators ◽  
Split Ring ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Attenuation Level ◽  
Low Pass ◽  
Novel Design ◽  
Good Agreement

In this work, a novel design of a Microstrip Low-pass filter based on metamaterial square split ring resonators (SRRs) is proposed. The SRRs has been added to obtain a reduced size and high performances. The filter is designed on an FR-4 substrate having a thickness of 1.6mm, a dielectric constant of 4.4 and loss tangent of 0.025. The proposed low-pass filter is characterized by a cutoff frequency of 2.4 GHz and an attenuation level below than -20dB in the stopband. The LPF is designed, simulated and optimized by using two electromagnetic solvers CST microwave studio and ADS. The computed results obtained by both solvers are in good agreement. The total surface area of the proposed circuit is 18x18mm2 excluding the feed line, its size is miniaturized by 40% compared to the conventional filter. The experimental results illustrate that the filter achieves very good electrical performances in the passband with a low insertion loss of 0.2 dB. Moreover, a suppression level can reach more than 35 dB in the rejected band.

Electronically Reconfigurable Varactor-Loaded HMSIW Bandpass Filter

Frequenz ◽  
2018 ◽  
Vol 72 (5-6) ◽  
pp. 227-230
Author(s):  
Jing-Pan Song ◽  
Xin-Yi Wang ◽  
Feng Wei ◽  
Xiao-Wei Shi
Keyword(s):  
Reverse Bias ◽  
Tuning Range ◽  
Bandpass Filter ◽  
Tunable Filter ◽  
Ring Resonators ◽  
Reverse Bias Voltage ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Filter Size ◽  
Good Agreement

AbstractA varactor-loaded half-mode substrate integrated waveguide (HMSIW) reconfigurable bandpass filter (BPF) is proposed in this paper. The proposed BPF is composed of complementary split-ring resonators (CSRRs) and varactors. Meanwhile, a nonmetalized via is employed in the center of the CSRR. It is noted that the varactor is embedded into the nonmetalized via, which can significantly reduce the tunable filter size. By changing the reverse bias voltage of the varactor, the resonant frequency of the proposed filter can be adjusted. Moreover, low insert loss (IL) and wide tuning range can be achieved. In order to validate its practicability, a BPF with the frequency ranging from 1.9 GHz to 2.5 GHz is fabricated and good agreement between the simulated and measured results is observed.

scholarly journals Design of a SIW Bandpass Filter Using Defected Ground Structure with CSRRs

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Weiping Li ◽  
Zongxi Tang ◽  
Xin Cao
Keyword(s):  
Bandpass Filter ◽  
Simulation Software ◽  
Ring Resonators ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Resonant Modes ◽  
Measurement Results ◽  
Good Agreement

In this paper, a substrate integrated waveguide (SIW) bandpass filter using defected ground structure (DGS) with complementary split ring resonators (CSRRs) is proposed. By using the unique resonant properties of CSRRs and DGSs, two passbands with a transmission zero in the middle have been achieved. The resonant modes of the two passbands are different and the bandwidth of the second passband is much wider than that of the first one. In order to increase out-of-band rejection, a pair of dumbbell DGSs has been added on each side of the CSRRs. The structure is analyzed using equivalent circuit models and simulated based on EM simulation software. For validation, the proposed filter is fabricated and measured. The measurement results are in good agreement with the simulated ones.

Compact and high‐selectivity microstrip bandpass filter using two‐stage twist‐modified asymmetric split‐ring resonators

2015 ◽  
Vol 51 (8) ◽  
pp. 635-637 ◽  
Author(s):  
Jian Li ◽  
Yongjun Huang ◽  
Guangjun Wen ◽  
Xiaolin Xue ◽  
Jiaming Song
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Ring Resonators ◽  
Two Stage ◽  
Split Ring ◽  
Split Ring Resonators
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