Results 201 to 210 of about 20,890 (228)
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A 0.94 ∼ 1.50 GHz Constant Absolute Bandwidth Tunable Bandpass Filter with Electric Coupling
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama), 2018In this paper, a method to get the electrically tunable bandpass filter with constant absolute bandwidth base on electric coupling is presented. By changing the position of the capacitor, the resonator can conveniently obtain the different slopes coupling line, and the constant bandwidth filter can obtain.
Dengyao Tian, Quanyuan Feng
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Tunable Diplexer With Identical Passband and Constant Absolute Bandwidth
IEEE Transactions on Microwave Theory and Techniques, 2020Frequency-adaptive bandpass diplexer (FA-BPD) with constant absolute bandwidths (ABWs) and two identical passbands at every state is the most useful duplexing tunable filter for the smart frequency-division duplex (FDD) system. However, it is widely considered a challenge.
Zhiyou Li, Xiaohong Tang, Di Lu, Ming Yu
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A Tunable Bandpass Filter with Constant Absolute Bandwidth
Journal of Electromagnetic Waves and Applications, 2011A novel tunable bandpass filter with constant absolute bandwidth is presented in this paper. Introducing a mixed electric and magnetic coupling structure and a new external coupling scheme, nearly constant absolute bandwidth is maintained across the tuning range. Theoretical analysis and design approach are demonstrated. The proposed filter is designed
B. Liu, F. Wei, Q. Y. Wu, X. W. Shi
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Tunable bandpass filters with constant absolute bandwidth cascaded trisection topology
Journal of Electromagnetic Waves and Applications, 2021A novel cascade trisection (CT) coupling structure, based on half-wavelength resonators, is proposed for designing constant absolute bandwidth (CABW) tunable bandpass filters.
JingJing Yang +4 more
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A Compact Tunable Dielectric Filter with Constant Absolute Bandwidth
2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 2018This paper presents a compact tunable filter, consisting of two coaxial dielectric resonators and a pair of parallel-coupled microstrip lines. Coaxial dielectric resonators are directly coupled to each other through the aperture on the side surface of the resonators. The aperture provides magnetic coupling, the parallel-coupled microstrip lines produce
Liangzu Cao, Junmei Yan, Lixia Yin
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Tunable bandpass filters with constant absolute bandwidth and high linearity
2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 2012This paper presents a frequency-agile bandpass filter with constant absolute bandwidth and high linearity. The proposed resonator is composed of an open-ended transmission line with back-to-back varactor diodes loaded at one end. A novel mixed electric and magnetic coupling scheme is proposed to contorll the coupling coefficients in order to keep the ...
Feng Lin Yu +4 more
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A constant absolute bandwidth filter with dual independent tunable passbands
2014 IEEE International Wireless Symposium (IWS 2014), 2014This paper presents a novel procedure to the design of independent tunable dual-band bandpass filters with constant absolute 3-dB bandwidths. Only two bias voltages are required to control the locations of the passbands, respectively. Two kinds of dual-mode resonators are proposed to be selected while designing the passbands.
Dinghong Jia +3 more
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Tunable S-band Elliptic Bandpass Filter With Constant Absolute Bandwidth
2021 IEEE 21st Annual Wireless and Microwave Technology Conference (WAMICON), 2021This paper presents a tunable bandpass filter in the S band. The proposed design cascades a 5th order elliptic low-pass filter (LPF) and a 5th order elliptical high-pass filter (HPF) to achieve the desired bandpass behavior. The absolute bandwidth of this design is determined by the resonance frequencies (transmission zeros) of the shunt series LC ...
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Tunable Cascaded Trisection Bandpass Filter with Constant Absolute Bandwidth
2021 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 2021JingJing Yang +4 more
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A Low-Loss Three-Pole Frequency-Agile Bandpass Filter with Constant Absolute Bandwidth
2019 IEEE MTT-S International Wireless Symposium (IWS), 2019In this letter, a three-pole frequency-agile bandpass filter (FA-BPF) with three transmission zeros (TZs) is presented. Based on the element variable coupling matrix (EVCM), the FA-BPF consists of two varactor-loaded quarter-wavelength resonators and one half-wave length resonator with varactors loaded at the specific position from the shorted-end.
Shiwen Tang +5 more
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