Application of Dual TM Modesto Triple- and Quadruple-Mode Filters

Bonetti, R.R.; Williams, A.E.

doi:10.1109/tmtt.1987.1133829

Cited by 54 publications

(14 citation statements)

References 7 publications

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“…기존의 다중 모드 공진기를 이용한 여파기의 경우, 도 파관 구조와 DR을 이용한 구조가 있다. 도파관의 이중 또는 삼중 모드 여파기는 그 형태와 크기에 따라 공진 모 드 및 주파수를 결정하고, 아이리스(iris)와 튜닝스크류(tuning screw)를 이용하여 모드 간의 결합을 유도한다 [4], [5] .…”

Section: ⅰ 서 론unclassified

Compact Triple-Mode Bandpass Filter Using a Cylindrical Dielectric Resonator

Jang¹,

Park²,

Kim³

et al. 2015

The Journal of Korean Institute of Electromagnetic Engineering

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In this paper, the design of a compact triple-mode bandpass filter using a high-Q cylindrical dielectric resonator is proposed. In detail, the triple TE01δ modes along three orthogonal axes are used and novel coupling structure in the metallic enclosure is adopted to introduce the coupling between the resonant modes. Due to the cross coupling, the proposed bandpass filter has an asymmetric frequency response with flexible three transmission zeros, one of which can be located very close to the passband edge to provide an extremely sharp skirt characteristic with low insertion loss. The proposed filter is about 60 % miniaturized compared with conventional single-mode dielectric resonator filter. The proposed bandpass filter design is validated by the circuit and 3D EM simulations and measurements compared to the target specifications.

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Section: ⅰ 서 론unclassified

Compact Triple-Mode Bandpass Filter Using a Cylindrical Dielectric Resonator

Jang¹,

Park²,

Kim³

et al. 2015

The Journal of Korean Institute of Electromagnetic Engineering

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“…One of the methods to achieve miniaturization is introducing multi-mode resonators (MMR) [3][4][5]. In 1951, Lin [6] introduced the very first MMR filter, after which many MMR filters were designed based on different perturbation methods, which include corner cuts [6,7] and irises [8,9]. But these MMR filters were restrained by narrow bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Multiple-Mode Wideband Bandpass Filter Using Split Ring Resonators in a Rectangular Waveguide Cavity

et al. 2018

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This paper presents a simple split ring resonator excitation to realize a multi-mode wideband bandpass filter in a rectangular waveguide cavity. The proposed resonator employs two rectangular split rings attached with two coaxial probes extended into the cavity to excite two resonant modes, unlike the conventional cavity resonators which employ conductive cylinders in the cavities to achieve the same results. A hybrid magnetic (HM) mode and a hybrid electric (HE) mode are the two hybrid modes excited to realize the wideband bandpass filter. The filter operates at 2.5 GHz center frequency with 53% fractional bandwidth. Finally, the prototypes of a second and a fourth order filter are fabricated for results validation. Measured results are in good agreement with the simulated ones.

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“…However, ceramic resonators are very expensive and seldom use in base-station filters. On the other hand, cavity-type waveguide multi-mode filters have been reported, as well [4]. But, these are filters for the Ku-band or the above, because the waveguide mode has a cut-off frequency and the size becomes very large.…”

Section: Introductionmentioning

confidence: 99%

Novel cavity-type multi-mode filter using TEM-mode and TE-mode

Yakuno

Ishizaki

2012

2012 Asia Pacific Microwave Conference Proceedings

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A novel cavity-type multi-mode bandpass filter is developed. TEM-modes and TE-modes are degenerated in a single cavity. Up to quadruple-mode is possible in the principle. Because coupling between two TEM-modes is too strong to design an appropriate pass bandwidth, triple-mode resonator is analyzed for this time. By EM field simulation, the resonance modes are identified and three resonance frequencies are coincided at 2GHz by tuning the cavity structure. Further, adjustment methods for resonance frequencies, inter-resonator couplings, and input/output couplings are investigated to form a three-pole pseudo-Elliptic-function BPF. Then, an experimental triple-mode filter is fabricated. The measured performance shows very excellent performance with high selectivity owing to the attenuation poles at both sides of the pass-band. Thus, the validity of the novel multi-mode filter concept is confirmed.

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Application of Dual TM Modesto Triple- and Quadruple-Mode Filters

Cited by 54 publications

References 7 publications

Compact Triple-Mode Bandpass Filter Using a Cylindrical Dielectric Resonator

Compact Triple-Mode Bandpass Filter Using a Cylindrical Dielectric Resonator

Multiple-Mode Wideband Bandpass Filter Using Split Ring Resonators in a Rectangular Waveguide Cavity

Novel cavity-type multi-mode filter using TEM-mode and TE-mode

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