A Wide Stopband Dual-Band Bandpass Filter Based on Asymmetrical Parallel-Coupled Transmission Line Resonator

Ma, Mingming; You, Fei; Qian, Ting; Shen, Ce; Qin, Rongxing; Wu, Tianxiao; He, Songbai

doi:10.1109/tmtt.2022.3168024

Cited by 13 publications

(2 citation statements)

References 45 publications

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“…To meet these requirements, many methods and structures have been proposed, such as step impedance resonator (SIR) [3][4][5], combined resonator [6][7][8][9][10][11], ring resonator [12][13][14], and parallel coupled line reference [15,16]. The main transmission line structures used in conventional microwave filters are: microstrip lines [17,18], waveguides [19][20][21], and coaxial lines [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Bandpass Filter for 5G Sub-6 GHz Bands

Wang,

Yu,

Yang

et al. 2024

PIER Letters

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The performance requirements for filters in the microwave frequency band are particularly stringent, particularly in terms of high bandwidth and out-of-band rejection. However, meeting these requirements within the constraints of a compact size presents a significant challenge. A coupled step-impedance resonator bandpass filter is proposed. The filter combines U-shaped branches and Lshaped branches to create multiple resonance points while expanding the bandwidth, and the in-band ripple is also improved by this folded structure that greatly reduces the filter size. The microstrip filter measures only 9.6 mm × 8.8 mm × 1.1 mm, has a center frequency of 4.65 GHz, and achieves a relative bandwidth of 60.2%. The filter can be used in 5G n77 (3300 ∼ 4200 MHz), n78 (3300 ∼ 3800 MHz), n79 (4800 ∼ 4960 MHz), and WLAN (5150 ∼ 5850 MHz) bands. In addition, the filter has a left-side rectangular coefficient of 1.12, insertion loss < 0.4 dB, and return loss better than 17 dB.

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Section: Introductionmentioning

confidence: 99%

Bandpass Filter for 5G Sub-6 GHz Bands

Wang,

Yu,

Yang

et al. 2024

PIER Letters

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“…USING the concept of stepped impedance and adding one or multiple stubs are the popular approaches to move the second resonant frequency of a resonator to a high frequency. Designs of filters and filter-based circuits with broad upper stopbands can be carried out by making use of the aforementioned techniques [1], [2], [3], [4], [5], [6], [7], [8], [9]. In general, designing them begins with formulating the resonators and moves on to executing coupling tests to attain the dimensions delivering the target coupling coefficients through simulations.…”

Section: Introductionmentioning

confidence: 99%

Transmission-Line Schematic for Harmonic-Controlled Bandpass Filters

2023

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This article presents a rigorous synthesis method of a transmission-line filter whose second passband can be placed at any multiple of the center frequency, in theory. Two coupled-line schematics for harmonic-controlled bandpass filters are derived from fundamental LC filter prototypes. Their design parameters are provided in closed-form expressions so filter dimensions can be acquired rigorously without relying on EM-simulation-based coupling tests. Three filters were designed and fabricated for verification purposes, and their measurement results exhibited excellent agreement with the theory.INDEX TERMS Filter design, filter synthesis, transmission-line filters.

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A compact diamond-shaped dual-band bandpass filter with multiple transmission zeros

Alazemi

2023

AEU - International Journal of Electronics and Communications

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A Wide Stopband Dual-Band Bandpass Filter Based on Asymmetrical Parallel-Coupled Transmission Line Resonator

Cited by 13 publications

References 45 publications

Bandpass Filter for 5G Sub-6 GHz Bands

Bandpass Filter for 5G Sub-6 GHz Bands

Transmission-Line Schematic for Harmonic-Controlled Bandpass Filters

A compact diamond-shaped dual-band bandpass filter with multiple transmission zeros

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