Novel Compact Wide-band Substrate Integrated Waveguide Bandpass Filter using Conductor Backed Coplanar Waveguide as Feed line for W-Band Communication Applications

A Ka-band substrate integrated waveguide bandpass filter has been designed and fabricated using low temperature co-fired ceramic (LTCC) technology. The in-house developed SICCAS-K5F3 material with a permittivity of 6.2 and a loss tangent of 0.002 was used. The size and surface area of the proposed bandpass filter are reduced by exploiting vertical coupling in vertically laminated three-dimensional structures. The coupling between adjacent cavities is realized by a narrow slot. A vertical transition structure between the coplanar-waveguide feed line and the substrate integrated waveguide is adopted to facilitate the internal signal connection. The demonstrated third-order filter has a compact size of 6.79 mm×4.13 mm×1.34 mm (0.63λ0 × 0.38λ0 × 0.12λ0) and exhibits good performance with a low insertion loss of 1.74 dB at 27.73 GHz and a 3 dB fractional bandwidth of 10 %.

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A Planar Bandpass Filter Implemented With a Hybrid Structure of Substrate Integrated Waveguide and Coplanar Waveguide

IEEE Transactions on Microwave Theory and Techniques ◽

10.1109/tmtt.2013.2294861 ◽

2014 ◽

Vol 62 (2) ◽

pp. 266-274 ◽

Cited By ~ 35

Author(s):

Peng Chu ◽

Wei Hong ◽

Linlin Dai ◽

Hongjun Tang ◽

Jixin Chen ◽

...

Keyword(s):

Bandpass Filter ◽

Coplanar Waveguide ◽

Hybrid Structure ◽

Substrate Integrated Waveguide

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Compact Bandpass Filter With High Selectivity Using Quarter-Mode Substrate Integrated Waveguide and Coplanar Waveguide

IEEE Microwave and Wireless Components Letters ◽

10.1109/lmwc.2017.2734845 ◽

2017 ◽

Vol 27 (9) ◽

pp. 809-811 ◽

Cited By ~ 15

Author(s):

Zhaosheng He ◽

Chang Jiang You ◽

Supeng Leng ◽

Xiang Li ◽

Yong-Mao Huang

Keyword(s):

High Selectivity ◽

Bandpass Filter ◽

Coplanar Waveguide ◽

Substrate Integrated Waveguide

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Millimeter-Wave Wide-Band Bandpass Filter in CMOS Technology Using a Two-Layered Highpass-Type Approach With Embedded Upper Stopband

IEEE Transactions on Circuits & Systems II Express Briefs ◽

10.1109/tcsii.2021.3064387 ◽

2021 ◽

pp. 1-1

Author(s):

Zeyu Ge ◽

Lishseng Chen ◽

Roberto Gomez-Garcia ◽

Xi Zhu

Keyword(s):

Millimeter Wave ◽

Bandpass Filter ◽

Wide Band ◽

Cmos Technology

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Miniaturized Wideband Loop Antenna Using a Multiple Half-Circular-Ring-Based Loop Structure and Horizontal Slits for Terrestrial DTV and UHD TV Applications

Sensors ◽

10.3390/s21092916 ◽

2021 ◽

Vol 21 (9) ◽

pp. 2916

Author(s):

Junho Yeo ◽

Jong-Ig Lee

Keyword(s):

Coplanar Waveguide ◽

Impedance Matching ◽

Circular Ring ◽

Loop Antenna ◽

Digital Television ◽

Loop Structure ◽

High Definition ◽

Circular Sector ◽

Feed Line ◽

Length Reduction

A miniaturized wideband loop antenna for terrestrial digital television (DTV) and ultra-high definition (UHD) TV applications is proposed. The original wideband loop antenna consists of a square loop, two circular sectors to connect the loop with central feed points, and a 75 ohm coplanar waveguide (CPW) feed line inserted in the lower circular sector. The straight side of the square loop is replaced with a multiple half-circular-ring-based loop structure. Horizontal slits are appended to the two circular sectors in order to further reduce the antenna size. A tapered CPW feed line is also employed in order to improve impedance matching. The experiment results show that the proposed miniaturized loop antenna operates in the 460.7–806.2 MHz frequency band for a voltage standing wave ratio less than two, which fully covers the DTV and UHD TV bands (470–771 MHz). The proposed miniaturized wideband loop antenna has a length reduction of 21.43%, compared to the original loop antenna.

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