Compact Design of Filtering Branch Line Coupler for GSM Frequencies Using Coupled TL

Choudhary, Dilip Kumar; Chaudhary, Raghvendra Kumar

doi:10.1109/imarc49196.2021.9714566

Cited by 10 publications

(4 citation statements)

References 11 publications

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“…Although the FNs are perfectly matched at the design frequency f 0 , the added TPs are not perfectly matched, as shown in Figure 6(a). Rewrite the (6) as…”

Section: Analysis Of the Proposed Couplermentioning

confidence: 99%

“…To mitigate these issues, additional low-pass filters are often used to eliminate unwanted harmonics. Previous attempts have been made to address these challenges using combinations of TLs and inductors [1], parallel-shorted and open stubs [2], parallel TLs [3], dual-open/short-stub loaded resonator [4,5], coupled lines [6], and lumped-element topologies [7]. However, these approaches have only achieved narrow harmonic-suppression bandwidths, limiting their practical applications.…”

Section: Introductionmentioning

confidence: 99%

“…There have been extensive researches on multifunctional multiport components in recent literatures [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. This is because cascading multiple microwave components can lead to increased circuit area, fabrication complexity, and insertion loss in the radio frequency front end.…”

Section: Introductionmentioning

confidence: 99%

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A Lumped-Element Directional Coupler for Bandwidth Enhancement, Impedance Matching, and Harmonic Suppressions

Zhuo

2024

International Journal of RF and Microwave Computer-Aided Engine

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This paper presents a lumped-element wideband directional coupler that enables arbitrary impedance matching and harmonic suppressions from 2f0. The coupler consists of four filtering networks (FNs) and an asymmetric branch-line hybrid serving as the matching network. The use of lumped-element topology helps reduce circuit size and improve harmonic suppressions. Each FN, composed of two lumped-element resonators, contributes two additional transmission poles, enabling bandwidth scaling, bandwidth enhancement, and harmonic suppressions. To demonstrate the effectiveness of the proposed design, a wideband coupler with various terminal impedances operating at 0.5 GHz is designed, simulated, and fabricated. The measured size is 0.039×0.039 λg2, the fractional bandwidth for –14.3 dB return loss is 46%, and the harmonic suppression is more than –30 dB from 0.69 to 4.5 GHz.

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“…Although the FNs are perfectly matched at the design frequency f 0 , the added TPs are not perfectly matched, as shown in Figure 6(a). Rewrite the (6) as…”

Section: Analysis Of the Proposed Couplermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Lumped-Element Directional Coupler for Bandwidth Enhancement, Impedance Matching, and Harmonic Suppressions

Zhuo

2024

International Journal of RF and Microwave Computer-Aided Engine

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“…To reduce the component number of the BFN for MAA, the multi‐way directional coupler gradually got the attention of researchers. Among the directional couplers, the two‐way directional coupler has been widely studied and applied, 11,12 while it is rarely used in MAAs on account of its small number of ports. The design of multi‐way directional coupler was proposed in 13 .…”

Section: Introductionmentioning

confidence: 99%

Design of broadband microstrip three‐way directional coupler for multibeam antenna application

Han

Wei

Wang

et al. 2023

Micro & Optical Tech Letters

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In this letter, a design of broadband microstrip three-way directional coupler (TWDC) is presented. The broadband performance of the microstrip TWDC is realized by the method of cascading multi-section. The broadband TWDC is designed to achieve equal power division and −120°, 0°, and +120°phase differences between output signals. To verify the broadband design, a prototype of three-section microstrip TWDC operating at C-band is designed, fabricated and measured. The measured results show that the power division error of the designed broadband TWDC is less than ±0.7 dB and phase error is less than ±12°at a relative bandwidth of 16%. To verify its performance in multibeam application, the designed TWDC is used as a beamforming network for multibeam antenna array to generate three orthogonal beams.

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Broadband Power Divider Design with Unequal Division and Small Size

Khudoyarova,

Ravshanov,

Kamolidinov

et al. 2023

2023 Dynamics of Systems, Mechanisms and Machines (Dynamics)

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Compact Design of Filtering Branch Line Coupler for GSM Frequencies Using Coupled TL

Cited by 10 publications

References 11 publications

A Lumped-Element Directional Coupler for Bandwidth Enhancement, Impedance Matching, and Harmonic Suppressions

A Lumped-Element Directional Coupler for Bandwidth Enhancement, Impedance Matching, and Harmonic Suppressions

Design of broadband microstrip three‐way directional coupler for multibeam antenna application

Broadband Power Divider Design with Unequal Division and Small Size

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