A COMPACT TUNABLE DUAL-BAND BANDPASS FILTER BASED ON SUBSTRATE INTEGRATED WAVEGUIDE AND DEFECTED GROUND STRUCTURE

2013 ◽  
Vol 41 ◽  
pp. 193-203 ◽  
Author(s):  
Zhudan Wang ◽  
Feng Wei ◽  
Li Zhang ◽  
Xiao-Wei Shi
Keyword(s):  
Bandpass Filter ◽  
Dual Band ◽  
Substrate Integrated Waveguide ◽  
Defected Ground Structure ◽  
Ground Structure

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 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.

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