scholarly journals A Compact Wide Bandpass Filter for Satellite Communications with Improved Out-of-Band Rejection

2020 ◽  
Vol 9 (1) ◽  
pp. 59-64
Author(s):  
B. Ait Ahmed ◽  
A. Naghar ◽  
O. Aghzout ◽  
A. Vazquez Alejos ◽  
F. Falcone
Keyword(s):  
Bandpass Filter ◽  
Ground Plane ◽  
Design Procedure ◽  
Surface Current ◽  
Satellite Communications ◽  
Ring Resonators ◽  
Surface Current Distribution ◽  
Split Ring ◽  
Coupled Line ◽  
Feed Line

This paper presents a compact C-band bandpass filter with improved out-of-band rejection. It consists of a symmetric three-pole parallel coupled line microstrip loaded with complementary split ring resonators (CSRRs) and slot resonators. Enhancements regarding the filter responses are obtained by etching these two parasitic shapes successively. When, CSRRs are introduced in the ground plane, exactly in the back of the transmission line of 50 -Ohms , improvements on the filter selectivity level are achieved. Whereas, the slot resonator elements are implemented on the feed line to permit the suppression of the second harmonics. To reduce the second harmonics of 11:1-13GHz, the parasitic elements are both combined, widen the filter rejection of 5:81%. The surface current distribution together with the equivalent circuit are also studied in order to demonstrate the slots and the CSRRs effect parameters on the behavior of the proposed filter. A prototype of the optimal filter is fabricated and measured.Theory and experiment results prove the validity of the new design procedure.

scholarly journals Broadband Microstrip Bandpass Filter Based on Open Complementary Split Ring Resonators

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
P. Vélez ◽  
J. Naqui ◽  
M. Durán-Sindreu ◽  
J. Bonache ◽  
F. Martín
Keyword(s):  
Bandpass Filter ◽  
Ground Plane ◽  
Bandpass Filters ◽  
Ring Resonators ◽  
Transition Band ◽  
Split Ring ◽  
Microstrip Technology ◽  
Split Ring Resonators ◽  
Transmission Zero

Broadband bandpass filters based on open complementary split ring resonators (OCSRRs) coupled through admittance inverters, and implemented in microstrip technology, are reported. As compared to other broadband filters based on open split ring resonators (OSRRs), ground plane etching is not necessary in the proposed filters. The selectivity of the filters at the upper transition band is improved thanks to the presence of a controllable transmission zero. To demonstrate the potential of this approach, two illustrative prototype devices have been designed and fabricated.

Multiband planar antenna with CSRR loaded ground plane for WLAN and fixed satellite service applications

Frequenz ◽  
2020 ◽  
Vol 74 (11-12) ◽  
pp. 393-399
Author(s):  
Debasish Pal ◽  
Rahul Singhal ◽  
Abhishek Joshi ◽  
Ayan Kumar Bandyopadhyay
Keyword(s):  
Ground Plane ◽  
Surface Current ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Multiband Antenna ◽  
Resonant Structures ◽  
Novel Approach ◽  
Application Potential ◽  
Satellite Service

AbstractIn this paper, a novel approach to achieve multiband antenna operation using metamaterial based resonant structures is presented. Multiband antenna operation is achieved by employment of complementary split ring resonators (CSRR) printed in the ground plane. The CSRRs resonate at different frequencies according to their optimized dimensions. Proposed approach features simple design and fabrication possibility compared to other methods of achieving multiband antenna operation such as usage of composite right/left-handed (CRLH) transmission line or split ring resonators (SRR) or CSRR around the patch surface. The proposed method is demonstrated through simulation and experimental measurements using three CSRRs with different resonant frequencies together with a tuning CSRR and a radiating patch. Contribution of different CSRRs to obtain multiple resonances have been shown by surface current plots. Measured antenna gain of 2.78, 1.27 and 3.45 dB has been obtained at frequencies of 5.25, 6.28 and 7.29 GHz respectively. The measurements done on developed antenna exhibits close agreement with the simulation results. In context with the current communication application trends involving multiple operating bands like 5G, this approach may have immense application potential since the same can be adopted to achieve compact multiband antennae operation in other frequency bands of interest.

Three Pole Wideband Waveguide Bandpass Filter using Split Ring Resonator Integrated Circular Fractal Shape

Frequenz ◽  
2017 ◽  
Vol 71 (7-8) ◽  
Author(s):  
Amit Bage ◽  
Sushrut Das
Keyword(s):  
Frequency Response ◽  
Bandpass Filter ◽  
Design Procedure ◽  
Chebyshev Approximation ◽  
Split Ring Resonator ◽  
Ring Resonators ◽  
Split Ring ◽  
Lumped Element ◽  
Ansoft Hfss ◽  
Quarter Wavelength

AbstractThis paper presents an alternative concept of metal insert to design compact, wideband, waveguide bandpass filter. Three planar circular fractals, integrated with Split Ring Resonators, have been placed on the transverse plane of a standard WR–90 waveguide at quarter wavelength distance to form the wideband, tri-pole bandpass filter. The proposed filter has been simulated using Ansoft HFSS (version 14) and using equiripple Chebyshev approximation its lumped element equivalent circuit has been obtained. The filter was also fabricated and its frequency response has been measured. The measured result shows a 3-dB fractional bandwidth of 14.08 % at resonant frequency 10.15 GHz. The total length of the filter is 20.33 mm. Detailed design procedure has been presented along with necessary diagram. A table has been provided to compare the performance of the proposed filter with those already available in literatures. The table shows that the proposed filter is compact, has higher bandwidth and better frequency response compared to the rests.

A Balanced Dual-Band BPF Based on C-CSRR with Improved Passband Selectivity

Frequenz ◽  
2019 ◽  
Vol 73 (5-6) ◽  
pp. 203-208
Author(s):  
Lei Chen ◽  
Qin Kun Xiao ◽  
Yan Ni Gan
Keyword(s):  
Bandpass Filter ◽  
Ring Resonator ◽  
Design Procedure ◽  
Split Ring Resonator ◽  
Ring Resonators ◽  
Dual Band ◽  
Differential Mode ◽  
Split Ring ◽  
Complementary Split Ring Resonator ◽  
Good Agreement

Abstract A balanced dual-band bandpass filter (BPF) is proposed by embedding two nested coupled complementary split-ring resonators (C-CSRRs) into a H-type balanced stepped-impedance slotline resonator in this paper. C-CSRR is composed of a complementary split-ring resonator (CSRR) with a pair of coupling slotlines in the open end, which can generate a bandpass response. In order to improve the passband selectivity further, source-load-coupled structure is employed. Moreover, it can be found that the proposed BPF has a wideband common-mode (CM) suppression, which is independent from the differential-mode (DM) passbands. Therefore, the design procedure can be significantly simplified. In order to validate its practicalbility, one balanced dual-band BPF is fabricated. The predicted results on S parameters are compared with the measured ones and a good agreement is found.

scholarly journals A study of the ground plane effect in passband filters using OSRR cells

DYNA ◽  
2015 ◽  
Vol 82 (193) ◽  
pp. 9-15
Author(s):  
Iván Eduardo Díaz Pardo ◽  
Carlos Arturo Suárez Fajardo ◽  
Gustavo Adolfo Puerto Leguizamón
Keyword(s):  
Ground Plane ◽  
The Other ◽  
Ring Resonators ◽  
Considerable Reduction ◽  
Split Ring ◽  
Microstrip Technology ◽  
Split Ring Resonators ◽  
Other Hand

This paper presents the study of the ground plane effect in passband filters using metamaterial cells in Open Split Ring Resonators (OSRR) structures on microstrip substrates. Three different configurations have been proposed, namely: by removing partially the ground plane of the OSRR cell back end, by windows design over the ground plane at the back end of each cell and by placing a full ground plane. The conducted analysis shows that the filter transmission response featuring a ground plane including windows proved to be the most flattened with the middle bandwidth of the three configurations. On the other hand, the performance of these filters is similar to a conventional filter based on three-pole microstrip technology but with a considerable reduction in size of about 60%.

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.

scholarly journals A Compact 5.5 GHz Band-Rejected UWB Antenna Using Complementary Split Ring Resonators

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
M. M. Islam ◽  
M. R. I. Faruque ◽  
M. T. Islam
Keyword(s):  
Ground Plane ◽  
Substrate Material ◽  
Ring Resonators ◽  
Uwb Antenna ◽  
Split Ring ◽  
Microwave Frequencies ◽  
Split Ring Resonators ◽  
Wireless Applications ◽  
Low Dielectric ◽  
Compact Dimension

A band-removal property employing microwave frequencies using complementary split ring resonators (CSRRs) is applied to design a compact UWB antenna wishing for the rejection of some frequency band, which is meanwhile exercised by the existing wireless applications. The reported antenna comprises optimization of a circular radiating patch, in which slotted complementary SRRs are implanted. It is printed on low dielectric FR4 substrate material fed by a partial ground plane and a microstrip line. Validated results exhibit that the reported antenna shows a wide bandwidth covering from 3.45 to more than 12 GHz, with a compact dimension of 22 × 26 mm2, and VSWR < 2, observing band elimination of 5.5 GHz WLAN band.

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