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Wide-Band Filtering Three-Port Coupler with Inherent DC-Blocking Function
摘要： This paper presents a novel wide-band filtering three-port coupler with inherent DC-blocking function, which is simply comprised of a power divider with wideband filtering function and a broadband phase shifter with a modified coupled line. For demonstration, a designed prototype operating at 3 GHz is simulated, fabricated, and measured. From the simulated and measured results, the coupler shows a 49% filtering bandwidth with 12-dB return loss and 90±5° phase shifting. The amplitude imbalance between the two output ports is less than 0.5 dB. The all-passband isolation is below -13 dB and the 25.7-dB upper stopband rejection is up to 5.4 GHz. The good agreement between the simulated and measured results validates the proposed idea. Hence, the proposed coupler is well suited for applications of wideband, filtering, and single-layer circuitry integration.
关键词： filtering,power divider,DC-blocking,phase shifter,wideband,Coupler
更新于2025-09-19 17:15:36
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[IEEE 2018 11th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) - HangZhou, China (2018.9.5-2018.9.7)] 2018 11th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) - Investigation of Ultra-wideband Ridged Half-Mode Substrate-Integrated Waveguide Coupler
摘要： In this paper, a novel ultra wideband (UWB) 3-dB coupler at X and Ku band based on ridged half-mode substrate integrated waveguide (RHMSIW) and embedded the shape of metal groove is designed, fabricated, and measured, which is widely used in microwave and millimeter wave circuits. The structural parameters of new UWB RHMSIW 3-dB coupler with three cascading metal groove cells are analyzed. The structure is simulated with a relative bandwidth of 48% at the center frequency of 15 GHz. The measured results show that the proposed RHMSIW coupler keeps good performance of the HMSIW coupler. Simulated results are in agreement with the measured results. The results show that the novel UWB RHMSIW 3-dB coupler can provide better performance and have a smaller size compared with reported couplers, which illustrates its application in the wideband millimeter wave systems.
关键词： metal groove,ultra wideband,coupler,Ridged half-mode substrate integrated waveguide (RHMSIW)
更新于2025-09-19 17:13:59
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[IEEE 2019 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Guangzhou, China (2019.5.19-2019.5.22)] 2019 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Wideband Coupler Based on Wide-Wall Coupling Half-Mode Ridge Substrate Integrated Waveguide
摘要： A wideband coupler based on half-mode ridge substrate integrated waveguide (HMRSIW) is designed in this paper. The coupler utilizes a gradual slot on wide-wall to couple. The measured coupling bandwidth is 49.8%. The return loss and isolation are better than 20dB from 11.76GHz to 17.88GHz.
关键词： half-mode ridge substrate integrated waveguide,HMRSIW,Ku-band,wideband coupler
更新于2025-09-19 17:13:59