scholarly journals A Bandpass Filter Based on Half Mode Substrate Integrated Waveguide-to-Defected Ground Structure Cells

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Yong Mao Huang ◽  
Zhenhai Shao ◽  
Zhaosheng He ◽  
Chang Jiang You ◽  
Di Jiang
Keyword(s):  
Insertion Loss ◽  
Bandpass Filter ◽  
Second Harmonic ◽  
Substrate Integrated Waveguide ◽  
Harmonic Suppression ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
X Band ◽  
Compact Size ◽  
Low Insertion Loss

A half mode substrate integrated waveguide-to-defected ground structure (HMSIW-DGS) cell and its embedded form are proposed to miniaturize a bandpass filter. Both cells can purchase wideband frequency response and low insertion loss, as well as simple and easy fabrication. By cascading two of them according to design requirement, an X-band bandpass filter is designed and measured to meet compact size, low insertion loss, good return loss, second harmonic suppression, and linear phase.

scholarly journals CSRR-DGS Bandpass Filter Based on Half Mode Substrate Integrated Waveguide for X-Band Applications

2021 ◽  
Vol 10 (3) ◽  
pp. 39-42
Author(s):  
B. Fellah ◽  
N. Cherif ◽  
M. Abri ◽  
H. Badaoui
Keyword(s):  
Insertion Loss ◽  
Bandpass Filter ◽  
Band Pass Filter ◽  
Substrate Integrated Waveguide ◽  
Defected Ground Structure ◽  
Pass Filter ◽  
Compact Component ◽  
X Band ◽  
Compact Size ◽  
Simulation Results

In this paper, a half mode substrate integrated waveguide (HMSIW) bandpass filter using defected ground structure cells (DGS) is proposed. By using the periodic square CSRR resonant properties of DGS according to design requirement, an X-band band-pass filter is designed and analyzed to meet compact size, low insertion loss, and high rejection. The simulation results obtained by CST in X-band show that the proposed filter is characterized by a large transmitted bandwidth of about 1.38 GHz from 13.03 to 14.41 GHz. The higher simulated insertion loss is about −2.6 dB and the lower return loss is about −34 dB. The proposed filter size is 9.50 × 38.00 mm2 which make it a compact component. The structure is optimized using CST simulator. For the proposal validation, the simulation results is compared by HFSS. The simulation results are in good agreement for the   two simulator.

Compact triple-band bandpass filter using multi-mode HMSIW cavity and half-mode DGS

2020 ◽  
pp. 1-8
Author(s):  
Sambaiah Pelluri ◽  
M. V. Kartikeyan
Keyword(s):  
Bandpass Filter ◽  
Substrate Integrated Waveguide ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Slot Line ◽  
Notch Band ◽  
Multi Mode ◽  
Triple Band

Abstract In this paper, a triple-band bandpass filter using a multi-mode half-mode substrate integrated waveguide (HMSIW) cavity is presented. In this design, back-to-back connected half-mode defected ground structure (DGS) is loaded into the HMSIW cavity, which generates the first passband. The first four modes of HMSIW cavity are TM110, TM120, TM310, and TM320. They have been used to generate second and third passbands. The slot line perturbation is used to shift the modes close to each other. Here, TM110 and TM120 constitute second passband, and TM310 and TM320 give third passband. Moreover, the notch band is designed using embedded open-circuited stub to improve the attenuation between the second and third passbands. The proposed filter is designed and fabricated on RT/Duroid 5880 substrate with a thickness of 0.508 mm. The measured results are in line with simulated ones for each of the passbands, and the center frequencies are 6.28, 13, and 19.12 GHz.

scholarly journals A Compact Wideband Dual-Polarized Antenna with Harmonic Suppression Using Nonuniform Defected Ground Structure

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Lana Damaj ◽  
Anne-Claire Lepage ◽  
Xavier Begaud
Keyword(s):  
Coplanar Waveguide ◽  
Stop Band ◽  
Harmonic Suppression ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Complete Structure ◽  
Harmonic Rejection ◽  
Compact Size ◽  
Dual Polarized ◽  
Band Characteristic

A wideband dual-polarized coplanar waveguide (CPW) fed antenna integrating a wide stop-band filter is presented. The designed filter is based on a nonuniform defected ground structure (DGS) in order to obtain a wide stop-band and a compact size. This filter is used to reject harmonics and spurious radiation arising from the RF front end. The complete structure (antenna and filter) has been optimized to have a compact size of0.6×0.6λ02(λ0being the free-space wavelength at the lowest operating frequency). The realized antenna operates in the frequency range between 2.7 GHz and 5.9 GHz (bandwidth of about 74%). The isolation between feeding ports is more than 18 dB. The complete structure has a wide stop-band characteristic (103%) for harmonic rejection. The simulated numerical results have been confirmed with measurements.

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