Dual-Mode Dual-Band Bandpass Cavity Filters With Widely Separated Passbands

Naeem, Umair; Perigaud, Aurélien; Bila, Stéphane

doi:10.1109/tmtt.2017.2723880

Cited by 23 publications

(12 citation statements)

References 17 publications

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“…A large number of data transmission and high-speed data transmission have triggered the demand for multiwideband cavity filters. There are several techniques and approaches reported in the literature to design dual-band cavity filters, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] such as waveguide, [1][2][3][4][5][6][7] dielectric resonator, [8][9][10][11] helical, 12 and coaxial cavity. [13][14][15][16][17][18] However, these dual-band filters are difficult to realize dual-wideband characteristics.…”

Section: Introductionmentioning

confidence: 99%

Miniature dual‐wideband filter based on a quadruple‐mode metal cavity

Zhang

Zuo

2021

Int J RF Microw Comput Aided Eng

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A quadruple-mode dual-wideband filter is proposed in this paper. The proposed cavity resonator consists of two symmetrical conductive posts and a pair of downward pointing L-shaped coupling probes in a cylindrical metal cavity, while four resonant modes of the resonator are classified as TM 11 mode, TM 01 mode and a pair of degenerate TE modes (TE+ mode and TE− mode).Successful excitation of the four modes is attributed to the two L-shaped coupling probes. The first wide-passband is realized by TM 11 mode and TM 01 mode, while the second wide-passband is achieved by TE+ mode and TE− mode. Finally, a quadruple-mode dual-wideband filter is designed, fabricated and measured. The measurements are in good agreement with the simulations, which validates the design.

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Section: Introductionmentioning

confidence: 99%

Miniature dual‐wideband filter based on a quadruple‐mode metal cavity

Zhang

Zuo

2021

Int J RF Microw Comput Aided Eng

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“…However, the overall size of this DBPF is considered to be large. In order to achieve size reduction, several DBPF design techniques are suggested in [5][6][7][8][9][10][11][12][13][14][15]. [6] suggests to obtain a dual passband response by two BPFs coexisting in a single cavity, which is known as dual-path method.…”

Section: Introductionmentioning

confidence: 99%

A Dual Bandpass Filter Design Using Strong Coupling, Evanescent Mode and Modular Concept

Sow¹,

Tan²,

Lu³

2021

PIER C

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This paper presents a new design concept of a dual bandpass filter. Based on the strong coupling between two resonators, a dual 1-pole band-pass filter is designed and is used as the basic building block. By providing appropriate weak coupling between these building blocks, a higher-order dual bandpass filter can be realized. In addition, these building blocks can be stacked vertically and/or horizontally to construct a compact filter. In this way, by using 3D full wave EM and circuit cosimulation, the simulation time required in the design stage can be reduced. In addition, it also provides a way to post-tune each building block individually and further reduces the time required in prototype post tuning process. However, using this design approach, the band separation ratio is limited by the physically achievable coupling. For demonstration, an L-band dual 4-pole bandpass filter is designed with passband frequencies of 1.2 GHz ∼ 1.255 GHz and 1.55 GHz ∼ 1.6 GHz. To reduce the size of the filter and obtain a wide stopband bandwidth, a suitable evanescent mode cavity is used to realize the resonant structure. The measurement result shows that the insertion losses of the low passband and high passband are 1.03 dB ∼ 2.00 dB and 1.02 dB ∼ 1.75 dB, respectively; the return loss of both passbands is better than 15 dB. Furthermore, up to 5 GHz, the stopband rejection level is better than 80 dB.

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“…As one of the important contributions for the filter design, synthesis techniques with the coupling matrix has been widely studied in single‐band design . For the dual‐band and multiband applications, different kinds of multi‐band components such as power dividers, antennas and filters have been studied . As an essential component, the dual‐band bandpass filters were studied in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…[2][3][4] For the dual-band and multiband applications, different kinds of multi-band components such as power dividers, antennas and filters have been studied. [5][6][7][8][9][10][11] As an essential component, the dual-band bandpass filters were studied in Ref. [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Computer aided design for dual-band filters with complex source and load impedances

Sun

2017

Int J RF Microw Comput Aided Eng

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This article presents a computer aided technique to synthesize the filtering function for dual‐band microwave filters with complex source and load impedances. Based on the exchange‐Remez algorithm and the power wave renormalization theory, the characteristic function is first obtained with assigned ripple level at the first passband. Two additional transmission zeros are then optimally allocated to control the ripple level at the second passband. By directly modifying the coupling matrix elements in the first and last stages, a simplified method is also presented when the loading impedance is frequency‐independent. Three synthesized examples with both controlled in‐band and out‐of‐band responses are presented. Finally, LC multi‐coupled circuits are also provided to validate the effectiveness of the proposed method.

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Dual-Mode Dual-Band Bandpass Cavity Filters With Widely Separated Passbands

Cited by 23 publications

References 17 publications

Miniature dual‐wideband filter based on a quadruple‐mode metal cavity

Miniature dual‐wideband filter based on a quadruple‐mode metal cavity

A Dual Bandpass Filter Design Using Strong Coupling, Evanescent Mode and Modular Concept

Computer aided design for dual-band filters with complex source and load impedances

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