- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Compact Wideband Hybrid Filters in Rectangular Waveguide With Enhanced Out-of-Band Response
摘要： This article describes the design procedure of a compact wideband waveguide filter, based on stepped impedance resonators (SIRs) and a combined usage of capacitive and inductive coupling irises, that provides a significant improvement in the out-of-band response of the filter with respect to the state-of-the-art. In addition to theory, several filter prototypes have been designed and manufactured. A detailed sensitivity analysis has also been carried out. Finally, simulations and measurements are compared, showing very good agreement, thereby fully validating the new filter topology.
关键词： Aggressive space mapping (ASM),stepped-impedance resonator (SIR),bandpass filters,wideband,hybrid (inductive and capacitive) irises
更新于2025-09-12 10:27:22
-
Compact Stripline Dual-Band Bandpass Filters With Controllable Frequency Ratio and High Selectivity Based on Self-Coupled Resonator
摘要： Dual-band stripline bandpass ?lters (BPFs) with widely controllable frequency ratio and high selectivity is proposed based on a new type of self-coupled resonator. The presented self-coupled resonator evolves from a symmetrical open-ended stepped-impedance resonator (SIR) by folding their two open-ended arms coupled with each other. Due to different capacitance characteristics under even- and odd-mode operation in coupled-line, the two fundamental resonant frequencies of self-coupled SIR bring out dual passbands that can be separated in a wider spacing than the ones generated by noncoupled resonator. In addition, due to the inherent coupling loop, two additional transmission zeros (TZs) are generated in the middle stopband between dual passbands, which greatly improves the isolation between dual passbands. For design guidance, theoretical responses are provided with numerical solutions of each resonant frequency and TZ. For demonstrative purposes, two ?lters with dual passbands centered at 1 and 4 GHz (frequency ratio of 4:1), as well as 2 and 3 GHz (frequency ratio of 1.5:1) are designed, fabricated and tested. In our designs, edge-coupled striplines are used for the ?nal implementation attributing to its good performances of no frequency dispersion in wideband and easy package. Ultimately, experimental results are displayed to convincingly verify the feasibility of proposed concept.
关键词： Controllable frequency ratio,self-coupled,stepped-impedance resonator (SIR),dual-passband ?lter
更新于2025-09-11 14:15:04
-
[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) - Dual-band Bandpass Filter Design with Novel Double-layer Mixed Coupled SIR/CPW-SIR Resonators
摘要： This paper presents a compact 2.4-/5.2GHz dual-band bandpass filter (BPF) design using novel double-layer mixed coupled SIR/CPW-SIR resonators. To miniaturize the footprint, the SIR is built on the top layer with CPW-SIR on the bottom layer. The coupling is tunable by modifying the resonator geometries. The characteristics of the novel resonator are studied which is suitable for dual-band applications. The fractional bandwidth (FBW) design graph is constructed for a straightforward dual-band filter synthesis. To validate our design theory, a fourth-order dual-band BPF prototype is design and fabricated. The measurement shows insertion losses of 1.7/2.95 dB with a 3-dB FBW of 12/10% at 2.4-/5.2-GHz bands, return loss of greater than 10 dB, inter-band isolation of greater than 30 dB, and stopband rejection above 15 dB up to 10 GHz. The filter has a compact size of 500×500 mil2.
关键词： mixed coupling,stepped impedance resonator (SIR),dual-band filter,double-layer
更新于2025-09-11 14:15:04
-
SUPER COMPACT MICROSTRIP UWB BPF WITH TRIPLE-NOTCHED BANDS
摘要： A new super compact ultra-wideband (UWB) bandpass ?lter (BPF) with triple-notched bands is presented in this paper. Firstly, a new square ring quad-mode resonator (SRQMR) is employed to obtain the initial UWB BPF. Then, a triple-mode stepped impedance resonator (SIR) is inserted into the initial UWB BPF to achieve three desired notched bands. The proposed triple-mode SIR is found to have the advantages of introducing triple-notched bands and provide a higher degree of freedom to adjust the resonant frequencies. To validate the design concept, a new super compact UWB BPF with triple-notched bands respectively centered at frequencies of 3.7 GHz, 5.2 GHz and 7.8 GHz is designed and measured. The predicted results are compared with measured data, and good agreement is reported.
关键词： triple-mode stepped impedance resonator (SIR),Ultra-wideband (UWB),square ring quad-mode resonator (SRQMR),bandpass ?lter (BPF),triple-notched bands
更新于2025-09-04 15:30:14