- 标题
- 摘要
- 关键词
- 实验方案
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Single coupled cavity filter design with dielectric resonators posts for millimeter‐wave applications
摘要： In this work, a single coupled cavity has presented for millimeter-wave applications. The cavity is modeled to study the effect on the quality factor by adding cylindrical posts to coupled cavity resonator. This cavity model demonstrates a higher quality factor result and better performance compare to empty substrate integrated waveguide (ESIW) filter. The concept of enhancing the quality factor by adding posts is achieved. Based on this concept, the coupled cavity and bandpass filter are presented to show the feasibility of the fabrication process for building an ESIW filter where cylindrical posts is placed in middle on the planar substrate. The introduced cavity offers very good performance around (1%) fractal bandwidth at 24.7 GHz center frequency with Q-factor of 2236. A cavity prototype is fabricated and measured where measurements agree well with simulation.
关键词： quality factor,coupled cavities,empty substrate integrated waveguide,resonators dielectric posts
更新于2025-09-12 10:27:22
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SUBSTRATE INTEGRATED WAVEGUIDE CIRCULAR ANTENNA FOR TERAHERTZ APPLICATION
摘要： This paper presents a multi-band annular ring antenna that is obtained from a single-layer probe-fed substrate integrated waveguide based on a graphene material, with three top plan slits. In order to create a multi-bands antenna, we conduct simulation of the antenna structure based on CST/HFSS, so we use parametric tuning to adjust TM modes. Simulations show a good results between the two methods (finite element method and integral method) CST and HFSS Simulators. The bandwidths for three modes are 340 GHz in first mode, 346 GHz in the second mode, and 104 GHz in the third mode. The simulation gains at T M11, T M02, and T M12 are 8.2 dB, 8 dB, and 11 dB, respectively. The proposed antenna can be used in therahertz applications.
关键词： graphene material,terahertz applications,multi-band annular ring antenna,substrate integrated waveguide
更新于2025-09-12 10:27:22
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[IEEE 2019 49th European Microwave Conference (EuMC) - Paris, France (2019.10.1-2019.10.3)] 2019 49th European Microwave Conference (EuMC) - A 2 × 3 Hybrid Substrate Integrated Waveguide Coupler Applied to Beamforming Network
摘要： A 2 × 3 substrate integrated waveguide (SIW) H-plane hybrid coupler operating at 28 GHz with constant phase shifting outputs is proposed. This proposed 6-port hybrid junction coupler can equally divide the input power into the three output ports, with a constant relative phase difference +120?, 0?, ?120?. Simulation results indicate that within 5% relative bandwidth, our designs achieve a good impedance matching with high isolation, and equal power division having constant phase shifting.
关键词： hybrid coupler,six-port junction,H-plane directional coupler,substrate integrated waveguide (SIW),millimeter-wave techniques
更新于2025-09-12 10:27:22
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Substrate‐integrated waveguide filtering crossovers with improved selectivity
摘要： Two substrate-integrated waveguide (SIW) filtering crossovers with high selectivity are presented. The orthogonal degenerate TE201 and TE102 modes in center square cavity are employed to realize the cross transmission and channel isolation. The offset coupling positions are then exploited for surrounding TE101-mode rectangular cavities to produce transmission zeros (TZs) above the passband in the first crossover design or for TE201-mode oversized rectangular cavities to generate one TZ on each side of the passband in the second crossover design. The footprint of first crossover has greatly been reduced, while the selectivity of both crossovers has been greatly improved. Two prototypes centered at 20 GHz are designed, fabricated, and tested for demonstration, showing good agreement between the simulated and measured results.
关键词： filtering crossovers,orthogonal degenerate modes,substrate-integrated waveguide,high selectivity
更新于2025-09-12 10:27:22
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Substrate-Integrated-Waveguide Power Dividers: An Overview of the Current Technology
摘要： Power dividers are important components of microwave/millimeter wave (mm-wave) circuit design. This article provides a comprehensive review of the state-of-the-art substrate-integrated-waveguide (SIW) power dividers/combiners. SIW technology converts waveguide-like structures into planar form, compensates for the drawbacks of microstrip structures at higher-frequency circuit designs, and minimizes production complexity and costs compared to conventional waveguide structures. An overview of how traditional dividers have progressively adopted the SIW technique is presented and a comparative performance analysis of the divider types and practical paradigm show the future potential of SIW technology.
关键词： microwave,power dividers,Substrate-integrated-waveguide (SIW),circuit design,millimeter wave
更新于2025-09-12 10:27:22
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[IEEE 2019 IEEE/MTT-S International Microwave Symposium - IMS 2019 - Boston, MA, USA (2019.6.2-2019.6.7)] 2019 IEEE MTT-S International Microwave Symposium (IMS) - A 90° Self-Compensating Slab Air-Filled Substrate Integrated Waveguide Phase Shifter
摘要： This paper presents a 90° self-compensating phase shifter based on a slab air-filled substrate integrated waveguide platform in Ka-band. A shorter phase shifter is obtained due to its operation mechanism. The measurement shows a relative phase shift of ???? ± ??. ??°, or around 8.9% for phase error, and an amplitude imbalance of 0.06 ± 0.14 dB over Ka-band. A theoretical study is presented together with simulation to understand the operation principle of this phase shifter. Simulation and measurement results are compared and discussed.
关键词： slab AFSIW (SAFSIW),phase shifter,compensating,Air-filled substrate integrated waveguide (AFSIW)
更新于2025-09-12 10:27:22
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[IEEE 2019 IEEE/MTT-S International Microwave Symposium - IMS 2019 - Boston, MA, USA (2019.6.2-2019.6.7)] 2019 IEEE MTT-S International Microwave Symposium (IMS) - Miniaturized Reconfigurable Dual-Band Bandstop Filter with Independent Stopband Control using Folded Ridged Quarter-Mode Substrate Integrated Waveguide
摘要： This paper presents a reconfigurable dual-band bandstop filter utilizing miniaturized folded ridged quarter-mode substrate integrated cavity. By loading a quarter-mode substrate integrated cavity with a capacitive ridge structure and folding the dominant field around said structure, significant miniaturization is achieved. Folded ridged quarter-mode substrate integrated cavity is shown to reduce the area of standard quarter-mode substrate integrated cavity by 92%, while also increasing the fundamental mode. A spurious-free reconfigurable dual-band bandstop filter using miniaturized folded ridged quarter-mode technology is designed, fabricated, and measured. In order to generate independent tuning of each stopband, two resonators are each loaded with a tunable the same capacitance, and nonresonating node, producing a frequency agile filtering section. Two filtering sections are then coupled together through an impedance inverter to produce a dual-band, two-pole bandstop filter. To the best of the authors’ knowledge, this paper presents the first dual-band bandstop filter using quarter-mode substrate integrated cavity technology in the present literature.
关键词： reconfigurable filter,folded,ridged,multiband filter,quarter-mode,substrate integrated waveguide (SIW),bandstop filter
更新于2025-09-12 10:27:22
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Compact and Wide Stopband Substrate Integrated Waveguide Bandpass Filter Using Mixed Quarter- and One-Eighth Modes Cavities
摘要： This letter presents the design of mixed quarter- and one-eighth modes substrate integrated waveguide (SIW) bandpass ?lter (BPF). The transmission zeros (TZs) of the proposed SIW BPF can provide wide stopband response and high selectivity characteristics by using different mode SIW cavities. For validation, two- and three-stage SIW BPFs with Chebyshev response were designed at a center frequency ( f0) of 8 GHz. The measured results are consistent with the simulations. For two-stage BPF, the insertion loss smaller than 0.9 dB is measured within the passband of 0.65 GHz (7.75–8.4 GHz). The return loss higher than 19.7 dB is measured within the same passband. The spurious is produced at around 18 GHz (<2.25 f0). The stopbands are attenuated more than 17.31 dB from the dc to 5.68 GHz (0.71 f0) and from 9.28 GHz (1.16 f0) to 16.67 GHz (2.08 f0). The TZs are produced at 10 GHz and around 18 GHz due to a small cross-coupling between source/load and the interaction of the higher resonant modes of cavities, respectively. For three-stage BPF, the |S21| and |S11| smaller than –1.3 dB and –18 dB are measured within the passband of 7.57–8.45 GHz fractional bandwidth (FBW = 11%), respectively. The TZs are produced at 1.102, 1.9, and 2.39 f0 and provide higher selectivity and attenuation compared to two-stage BPF.
关键词： quarter-mode cavity,substrate integrated waveguide (SIW) ?lter,one-eighth-mode cavity,Harmonic suppression
更新于2025-09-12 10:27:22
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Substrate Integrated Waveguide Symmetrical Window Bandpass Filter for Satellite Applications
摘要： This paper presents the design and the simulation of a substrate integrated waveguide band-pass third order filter having 0.1dB band-pass ripple. The filter is designed for the pass band from 10 GHz to 11.7 GHz by using symmetrical inductive irises, the bandwidth of the filter is about 15% the return loss is about 33dB at 10.5 GHz. This filter design was made by using the electromagnetic Simulator CST – MWS.
关键词： Microstrip,substrate integrated waveguide,FR-4,waveguides,via
更新于2025-09-12 10:27:22
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Implementation of slow wave characteristics in a microstrip antenna and its implementation with substrate integrated waveguide
摘要： In this article, a planar slow wave long-wire-antenna (LWA) is proposed for RF and microwave applications. Mathematical design equations of transformation of cylindrical LWA into planar microstrip antenna are presented. Slow wave effect produced by LWA is demonstrated in terms of group delay in a square slot aperture antenna and the same is compared with the proposed LWA embedded with square slot in the ground plane. Furthermore, substrate integrated waveguide is embedded with the proposed structure which further enhance the antenna gain and group delay. Group delay of about 2 ns is enhanced to the value of 26.7 ns after the integration of substrate integrated waveguide with LWA. Finite element method is used to investigate the design through Ansoft HFSS simulator, which is further validated by measured results of fabricated prototype.
关键词： slow wave characteristics,substrate integrated waveguide,cross-polarization suppression,defected ground structure,long wire antenna
更新于2025-09-12 10:27:22