scholarly journals A compact lowpass/dual-band bandpass filter for microwave application

2021 ◽  
Vol 34 (2) ◽  
pp. 281-290
Author(s):  
Priyanshu Sadwal ◽  
Amit Bage
Keyword(s):  
Bandpass Filter ◽  
Cutoff Frequency ◽  
Ring Resonators ◽  
Dual Band ◽  
Lowpass Filter ◽  
Split Ring ◽  
Resonant Frequencies ◽  
Microwave Application ◽  
Numerical Result ◽  
Filter Structure

A combination of lowpass and dual band bandpass filter with improved selectivity is presented in this manuscript. Two circular split ring resonators which are connected at the upper side, provide a lowpass filter characteristics. In order to achieve combined lowpass with dual passband response two L-shape stubs are incorporated into the lowpass filter structure. The parametric analysis of the proposed filter has been carried out using CST microwave studio. The numerical result shows a 3-dB cutoff frequency for lowpass at 1.22 GHz, first and second passband resonant frequencies are 2.44 GHz and 3.7 GHz respectively. The proposed filter is compact and overall size of the proposed filter is 32.9 mm?15mm.

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.

Compact dual-band bandpass filter using octagonal split-ring resonators with side-coupled stubs

2011 ◽  
Vol 53 (5) ◽  
pp. 1169-1171 ◽  
Author(s):  
H. W. Liu ◽  
L. Shen ◽  
X.H. Guan ◽  
D. C. Huang ◽  
J. S. Lim ◽  
...  
Keyword(s):  
Bandpass Filter ◽  
Ring Resonators ◽  
Dual Band ◽  
Split Ring ◽  
Split Ring Resonators

Design and development of metamaterial bandpass filter for WLAN applications using circular split ring resonator

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Gnanasekaran Revathi ◽  
Savarimuthu Robinson
Keyword(s):  
Return Loss ◽  
Bandpass Filter ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Ring Resonators ◽  
Method Of Moment ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Split Ring ◽  
Filter Structure

Abstract In this paper, a metamaterial bandpass filter using Split Ring Resonators (SRR) is designed, analyzed, and developed for WLAN applications at 2.4 GHz frequency band. Here, metamaterial bandpass filters with and without Defected Ground Structure (DGS) are designed, analyzed and compared. The filter structure shows a considerable size reduction with 50% fractional bandwidth, quality factor of 2 and wide bandwidth. The simulation results of the proposed filters offered good insertion loss and return loss response. The filters have been modeled, fabricated and their performance has been evaluated using the Method Of Moment (MOM) based electromagnetic simulator IE3D. The dimensions of the proposed filter is 20 × 9 × 1.6 mm which is considerably reduced. The simulated and measured results projected that the proposed metamaterial filters are well suited for WLAN applications.

Compact Dual-band Bandpass Filter Based on HMSIW and DS-CSRR

Frequenz ◽  
2017 ◽  
Vol 71 (7-8) ◽  
Author(s):  
Hong Yi Kang ◽  
Jing Pan Song ◽  
Jiao Li ◽  
Feng Wei
Keyword(s):  
Bandpass Filter ◽  
The Other ◽  
Ring Resonators ◽  
Dual Band ◽  
Substrate Integrated Waveguide ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Good Agreement

AbstractA compact dual-band bandpass filter (BPF) based on a half-mode substrate integrated waveguide (HMSIW) and double-side complementary split-ring resonators (DS-CSRR) is investigated in this paper. The proposed DS-CSRR consists of two complementary split-ring resonators (CSRRs) with different sizes. One is etched on the top surface of HMSIW, the other is on the ground. By changing the parameters of DS-CSRR, both the center frequencies and the bandwidths can be controlled independently, respectively. In order to validate its practicability, a dual-band BPF centered at 3.5 GHz/5.2 GHz is designed and demonstrated. The simulated and measured results are in good agreement with each other.

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