Compact single‐layer bandwidth‐enhanced balanced bandpass filter using half‐mode substrate‐integrated waveguide

Abstract This paper presents a compact multilayer substrate integrated waveguide (SIW) bandpass filter with wide stopband. The square SIW cavity resonators in multilayer substrates are horizontally and vertically coupled with magnetic coupling. By properly designing the coupling structure, the couplings between the higher-order resonant modes can be suppressed. Compared with the conventional single-layer SIW filters, the proposed multilayer SIW filter also exhibits a compact size. To verify the design concept, a double-layered SIW filter is fabricated and measured. The measured results agree well with the simulations. The measured results show that the upper stopband of the filter is extended to 2.73 times of the center frequency 8.02 GHz.

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A Novel Planar Extended Doublet Filter with Substrate Integrated Waveguide Cavity Resonators

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.631-632.962 ◽

2013 ◽

Vol 631-632 ◽

pp. 962-966

Author(s):

Kai Shen ◽

Tao Li ◽

Jing Jing Wang

Keyword(s):

Insertion Loss ◽

Return Loss ◽

Bandpass Filter ◽

Single Layer ◽

Substrate Integrated Waveguide ◽

Cavity Resonators ◽

Transmission Zeros ◽

Measurement Results ◽

Negative Coupling ◽

First Time

A novel planar extended doublet filter based on substrate Integrated waveguide cavity resonators was proposed for the first time. This filter consists of a main doublet with an additional resonator grown in one of the branches. The source and load are coupled to both branches of the doublet in order to generate two transmission zeros. By employing the combinational structure of the TE101-mode and TE102-mode of the SIW cavity resonators, the negative coupling coefficient required for the design of a single-layer cross-coupled SIW bandpass filter is implemented. The measurement results show the return loss of the implemented filter is above 13dB, the insertion loss is below 4.238dB with only 0.56% of the bandwidth.

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A Novel Wideband transition from Substrate Integrated Waveguide to Rectangular Waveguide

International Journal of Sensors Wireless Communications and Control ◽

10.2174/2210327910666200320092322 ◽

2020 ◽

Vol 10 ◽

Author(s):

Keyur Mahant ◽

Hiren Mewada ◽

Amit Patel ◽

Alpesh Vala ◽

Jitendra Chaudhari

Keyword(s):

Rectangular Waveguide ◽

Printed Circuit Board ◽

Low Cost ◽

Single Layer ◽

Circuit Board ◽

Substrate Integrated Waveguide ◽

Ka Band ◽

Better Than ◽

Millimeter Wave Circuits ◽

Wideband Transition

Aim: In this article, wideband substrate integrated waveguide (SIW) and rectangular waveguide (RWG) transition operating in Ka-band is proposed Objective: In this article, wideband substrate integrated waveguide (SIW) and rectangular waveguide (RWG) transition operating in Ka-band is proposed. Method: Coupling patch etched on the SIW cavity to couple the electromagnetic energy from SIW to RWG. Moreover, metasurface is introduced into the radiating patch to enhance bandwidth. To verify the functionality of the proposed structure back to back transition is designed and fabricated on a single layer substrate using standard printed circuit board (PCB) fabrication technology. Results: Measured results matches with the simulation results, measured insertion loss is less than 1.2 dB and return loss is better than 3 dB for the frequency range of 28.8 to 36.3 GHz. By fabricating transition with 35 SRRs bandwidth of the proposed transition can be improved. Conclusion: The proposed transition has advantages like compact in size, easy to fabricate, low cost and wide bandwidth. Proposed structure is a good candidate for millimeter wave circuits and systems.

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