Results 141 to 150 of about 3,783 (193)

A novel tunable multimodal bandpass filter

2011 41st European Microwave Conference, 2011
This paper presents a novel uniplanar tunable bandpass filter. In this filter, each resonator can be reconfigured easily using PIN diodes or MEMS switches. Design equations are derived from a simple circuit model which takes into account the multimodal behavior of the coplanar waveguide.
Contreras Lizarraga, Adrián Arturo, Pradell i Cara, Lluís, Ribó, M.   +2 more
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A Tunable Bandpass Filter with Switchable Bandwidth

Journal of Electromagnetic Waves and Applications, 2011
A novel bandpass filter with tunable center frequency and switchable bandwidth is presented in this paper. This work is devoted to demonstrate a new approach to tune bandwidth of filters by changing the size of perturbation patch of dual-mode resonator.
B. Liu, F. Wei, H. Zhang, X. Shi, H. Lin
openaire   +1 more source

Magnetically tunable bandpas filter of teraherz radiation

Izvestiya vysshikh uchebnykh zavedenii. Fizika, 2022
A magnetically tunable bandpass filter of terahertz radiation is created and investigated. The filter is a cell with a magnetic fluid and a system of inductance coils made in the form of Helmholtz rings. The magnetic fluid consists of automotive synthetic engine oil and 5BDSR alloy microparticles with a mixed amorphouscrystalline structure. When a cell
Kochnev, Zahar S., Kistenev, Yury V., Borisov, Alexey V.   +2 more
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Progress of a tunable active bandpass filter

Annales Des Télécommunications, 1992
A review of a tunable active bandpass filter developed in our research group is given here. Presented first is the basic structure of an end-coupled microstrip-line bandpass filter. Next discussed is the concept of using coupled negative resistance to compensate the loss of tank circuit.
Jenshan Lin, Chi-Yang Chang, Yukio Yamamoto, Tatsuo Itoh   +3 more
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Active varactor tunable bandpass filter

IEEE Microwave and Guided Wave Letters, 1993
A microstrip active varactor tunable bandpass filter is presented. The filter is based upon the negative resistance method using a microstrip combline network. A 1.8-GHz, two-pole device with a bandwidth of 2% was constructed. 0.6 octave tuning with significant improvement in passband performance was achieved compared with its passive counterpart. >
S.R. Chandler, I.C. Hunter, J.G. Gardiner   +2 more
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A spurious-free tunable bandpass filter

2008 Asia-Pacific Microwave Conference, 2008
This paper presents a simple structure for suppressing the second-harmonic of tunable filters. The proposed resonator for the filter possesses the advantage that its resonant frequencies of odd-mode can be electrically tuned, whereas the even-mode harmonics can be suppressed. In addition, it is very simple and compact in structure.
null Xiu Yin Zhang, null Jian-Xin Chen, null Jin Shi, null Quan Xue   +3 more
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Tunable and programmable optical bandpass filter

Journal of Optics A: Pure and Applied Optics, 2007
We demonstrate a novel tunable and programmable optical bandpass filter with a transmission peak less than 5 pm wide that is tunable over 18.5 nm. The number of transmission windows within the stop band, as well as each window's position and strength, is set by applying a heat profile to a chirped fibre Bragg grating with the aid of a thermal printer ...
I Petermann, S Helmfrid, O Gunnarsson, L Kjellberg   +3 more
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Packaged Tunable Combline Bandpass Filters

IEEE Microwave Magazine, 2015
This article describes the design of a packaged tunable bandpass filter used for the Student Filter Design Competition held during the 2014 International Microwave Symposium (IMS2014) in Tampa, Florida. The focus of the 2014 competition was to demonstrate a tunable bandpass filter between two wide separated bands.
Fang-Sheng Su, Yi-Ming Chen, Sheng-Fuh Chang   +2 more
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Tunable dielectric resonator bandpass filter

13th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2000. Conference Proceedings (IEEE Cat. No.00EX428), 2002
A simple but effective technique has been applied to magnetically tune the quasi-TE/sub 011/ mode dielectric resonator. The tuning was achieved by means of a ferrite rod situated centrally in the dielectric resonator and extending over the shield. The ferrite parameters were changed by DC magnetic field.
J. Krupka, A. Abramowicz, K. Derzakowski
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Wideband bandpass filter with tunable passband

2015 Asia-Pacific Microwave Conference (APMC), 2015
In this paper, a tunable wideband bandpass filter based on stub-loaded stepped-impedance ring resonator is proposed. By changing the characteristic impedances of the loaded stubs, the bandwidth of the passband can be controlled with the center frequency unchanged. The even-and odd-mode method is applied to obtain the expression of S11 and S21.
Cong Tang, Xianqi Lin, Yong Fan, Kaijun Song   +3 more
openaire   +1 more source