Double-layer substrate integrated waveguide structure with variable fractional bandwidth

2007 ◽  
Vol 49 (6) ◽  
pp. 1459-1463 ◽  
Author(s):  
Lei Xu ◽  
Wenquan Che ◽  
Liang Geng ◽  
Dapeng Wang
Keyword(s):  
Double Layer ◽  
Waveguide Structure ◽  
Substrate Integrated Waveguide ◽  
Fractional Bandwidth

scholarly journals Bandwidth Enhancement on Half-Mode Substrate Integrated Waveguide Antenna Using Cavity-Backed Triangular Slot

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Dian Widi Astuti ◽  
Muhamad Asvial ◽  
Fitri Yuli Zulkifli ◽  
Eko Tjipto Rahardjo
Keyword(s):  
Waveguide Structure ◽  
Slot Antenna ◽  
Center Frequency ◽  
Substrate Integrated Waveguide ◽  
Fractional Bandwidth ◽  
Radiation Characteristics ◽  
Bandwidth Enhancement ◽  
Rectangular Slot ◽  
Design Evolution ◽  
Good Agreement

This paper proposes bandwidth enhancement of a cavity-backed slot antenna using a triangular slot on a half-mode substrate integrated waveguide structure antenna. The bandwidth enhancement was achieved by combining the fixed TE101 and the downward shifting TE102 modes, resulting in hybrid modes. The design evolution of the slot antenna from a half nonresonating rectangular slot to a triangular slot antenna increased the fractional bandwidth. The simulation result showed that fractional bandwidth increased from 6.27% to 9.1%. It was confirmed by measurement that the fractional bandwidth of 9.87% was achieved which reflects a 350 MHz bandwidth with center frequency at 3.84 GHz. The measured gain at center frequency was 4.2 dBi. It is shown that the radiation characteristics obtained from both measurement and simulation results are in very good agreement.

scholarly journals Novel Hexagonal Dual-Mode Substrate Integrated Waveguide Filter with Source-Load Coupling

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Ziqiang Xu ◽  
Gen Zhang ◽  
Hong Xia ◽  
Meijuan Xu
Keyword(s):  
Center Frequency ◽  
Substrate Integrated Waveguide ◽  
Fractional Bandwidth ◽  
Dual Mode ◽  
Transmission Zeros ◽  
Cavity Structure ◽  
Waveguide Filter ◽  
And Performance ◽  
Single Cavity ◽  
Good Agreement

Hexagonal dual-mode cavity and its application to substrate integrated waveguide (SIW) filter are presented. The hexagonal SIW resonator which can combine flexibility of rectangular cavity and performance of circular cavity is convenient for dual-mode bandpass filters design. By introducing coupling between source and load, the filter not only has good selectivity due to two controllable transmission zeros, but also has a small size by the virtue of its single-cavity structure. A demonstration filter with a center frequency of 10 GHz and a 3 dB fractional bandwidth of 4% is designed and fabricated to validate the proposed structure. Measured results are in good agreement with simulated ones.

A broadband filter based on hybrid spoof surface plasmon and half‐mode substrate integrated waveguide structure

2018 ◽  
Vol 29 (5) ◽  
pp. e21558
Author(s):  
Dong‐Fang Guan ◽  
Peng You ◽  
Zang‐Biao Yang ◽  
Shen‐Da Xu ◽  
Xianjun Huang ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Waveguide Structure ◽  
Substrate Integrated Waveguide

A compact, broadband three-way substrate integrated waveguide power divider with improved isolation

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Arun Kumar Gande ◽  
Souma Guha Mallick ◽  
Bijit Biswas ◽  
Sayan Chatterjee ◽  
Dipak Ranjan Poddar
Keyword(s):  
Return Loss ◽  
Power Divider ◽  
Substrate Integrated Waveguide ◽  
Fractional Bandwidth ◽  
Coupling Region ◽  
Content Type ◽  
Power Dividers ◽  
Power Coupling ◽  
Input And Output ◽  
Input Matching

Purpose This paper aims to present a compact, broadband substrate integrated waveguide (SIW) three-way power divider with improved isolation based on six-port SIW coupler. Design/methodology/approach The power coupling among the three output ports occurs due to short openings in the narrow walls of the central SIW channel. Performance improvement in the isolation and return loss among ports is achieved using matching posts placed at the input and output ends of the coupling region. This enhances the coupling between TE10 and TE30 modes. The input matching ports enhance the return loss, whereas the isolation is alleviated by both the input and output matching posts. The bandwidth enhancement is achieved by optimizing the outer SIW channel widths. Findings The measured fractional bandwidth of 27.3% with over 15 dB of isolation and return loss is achieved. The coupling length is 1.55 λg at the centre frequency. The power divider achieves better than 15 dB isolation between non-adjacent output ports. The measured reflection and isolation coefficients are in close agreement with simulated results over 8.2 to 10.8 GHz. Practical implications Isolation between the adjacent and non-adjacent ports is an important parameter as the reflections from these ports will interfere with signals from other ports reducing the fractional bandwidth of the power divider and affecting the overall performance of the transmitters and receivers. Originality/value The authors present the enhancement of isolation between the output non-adjacent ports by optimizing the SIW channel width and matching post in the coupling region to reduce the reflected signals from non-adjacent ports entering into other ports. To the author’s knowledge, this is the only SIW three-way power divider paper showing non-adjacent port isolation among six-port couplers based three-way power dividers.

Compact double-layer substrate integrated waveguide magic Tee for X-band applications

2016 ◽  
Vol 58 (4) ◽  
pp. 932-936 ◽  
Author(s):  
Giuseppe Venanzoni ◽  
Davide Mencarelli ◽  
Antonio Morini ◽  
Marco Farina ◽  
Onofrio Losito ◽  
...  
Keyword(s):  
Double Layer ◽  
Substrate Integrated Waveguide ◽  
X Band

Scanning Rate Enhancement of Leaky-Wave Antennas Using Slow-Wave Substrate Integrated Waveguide Structure

2018 ◽  
Vol 66 (7) ◽  
pp. 3747-3751 ◽  
Author(s):  
Dong-Fang Guan ◽  
Qingfeng Zhang ◽  
Peng You ◽  
Zhang-Biao Yang ◽  
Yang Zhou ◽  
...  
Keyword(s):  
Slow Wave ◽  
Waveguide Structure ◽  
Substrate Integrated Waveguide ◽  
Leaky Wave ◽  
Rate Enhancement ◽  
Scanning Rate
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