A Dual-Band Port-Extended Branch-Line Coupler and Mitigation of the Band-Ratio and Power Division Limitations

Maktoomi, Mohammad A.; Hashmi, Mohammad S.; Ghannouchi, Fadhel M.

doi:10.1109/tcpmt.2017.2661864

Cited by 27 publications

(21 citation statements)

References 30 publications

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“…Thus, there is a suitable range of R for which a compact dual‐band coupler using the circuit topology proposed in this article can be designed with feasible values of characteristic impedance, as with the couplers reported in references . To evaluate this range, the behavior of all characteristic impedances ( Z Π , Z Π /√2, Z a , and Z b ) as a function of R is analyzed here for different values of α , β , p , and q .…”

Section: Feasibility Analysismentioning

confidence: 99%

“…Some other recent works have demonstrated dual‐band coupler designs featuring flexible phase and amplitude balance and improved or arbitrary range of R for realizable couplers. However, these circuit topologies are more complex and may require the use of coupled lines, which can make the coupler design and fabrication more difficult.…”

Section: Introductionmentioning

confidence: 99%

“…Particularly, the use of open stepped-impedance stubs instead of ordinary open stubs for the T-shaped and Π-shaped circuits, as proposed in references 9,10, is shown to provide design flexibility, size reduction, and larger ranges of R for which it is possible to design a dual-band coupler with feasible values of characteristic impedance. Some other recent works [11][12][13] have demonstrated dualband coupler designs featuring flexible phase 11 and amplitude 12 balance and improved 12 or arbitrary 13 range of R for realizable couplers. However, these circuit topologies are more complex and may require the use of coupled lines, 11 which can make the coupler design and fabrication more difficult.…”

Section: Introductionmentioning

confidence: 99%

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Dual‐band branch‐line coupler with shorted stepped‐impedance stubs arranged in a Π‐shaped topology

Seko

Correra

2019

Micro & Optical Tech Letters

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This article presents a transmission‐line‐based 3‐dB dual‐band branch‐line coupler. The coupler is easily realizable for ratios between the upper and lower operating frequencies ranging from 1.270 to 2.628. This means that it can be designed for two operation frequencies that are closer to each other in comparison with existing simple circuit topologies based on transmission lines, when considering a compact design. The complete set of equations for all possible responses of this dual‐band 90° hybrid coupler is derived. To evaluate its practical feasibility, the proposed circuit is analyzed with respect to the characteristic impedances of its transmission lines. A step‐by‐step procedure is presented to help the circuit designer deal with the use of the equations and all their degrees of freedom. For experimental validation, a microstrip dual‐band branch‐line coupler has been designed for operation at 3.835 and 5.285 GHz. A good agreement is observed between simulated and measured results.

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Section: Feasibility Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dual‐band branch‐line coupler with shorted stepped‐impedance stubs arranged in a Π‐shaped topology

Seko

Correra

2019

Micro & Optical Tech Letters

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“…Finally, Z E and Z O are obtained as (17) and (18) at frequency f 1 and f 2 respectively, by putting the value of θ 1 and θ 2 from (15)- (16) into (11)- (12).…”

Section: Dual Band Operationmentioning

confidence: 99%

“…Multiband BLC is a key component to design a multiband system, needed for the migration and up gradation of the wireless communication industry. Many structures and methods adopted to design dual band BLC such as T shaped TL [11], [12], π shaped TL [13], center tapped stub [14], coupled line (CL) with short stub [15], parallel combination of CL and TL [16], port extension [17], [18], CLs [19]- [22], dual TL [23], folding of TL [24], and CL with TL [25]. The techniques for dual band BLC presented in [11]- [25] are applicable only when the frequency ratio (k) between two operating frequencies is ≤4.…”

Section: Introductionmentioning

confidence: 99%

A Dual Band Branch Line Coupler With Wide Frequency Ratio

et al. 2019

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A dual-band quadrature branch line coupler (BLC) with wide frequency ratio has been proposed in this paper. A dual-band quarter wave (λ/4) transmission line structure with wide frequency ratio operation has also been presented here with closed-form design equations. An analysis for the BLC's circuit parameters variations versus frequency ratio in the view of the implementation has been carried out as well. In order to the experimental verification, a dual-band BLC has been designed, implemented, and analyzed then tested for long term evolution (LTE) 0.7GHz and public safety band (PSB) 4.9GHz. The novelty of the proposed design is the wide frequency ratio of its dual-band operation, which can reach up to 11.8. INDEX TERMS Branch line coupler, dual band, wide frequency ratio, coupled line, open stub.

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Generalized design of a versatile tri‐frequency Wilkinson power divider

Banerjee¹,

Hashmi

2021

Int J RF Microw Comput Aided Eng

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This article presents the design, conceptualization, and validation of a generalized architecture for a Wilkinson Power Divider (WPD). The proposed design strategy highlights the versatility of incorporating a broad variety of dual‐band impedance transformers as a part of the WPD, thereby extending its range of applications. As an example, a DC blocking variant of the proposed WPD has also been designed for demonstration. Simple closed‐form design equations have been developed and validated with classical examples and case studies. Finally, two prototypes‐ one ordinary and another DC blocking variant have been fabricated on RO4350 (ɛr = 3.6) substrate and measured. The measurement results are well in accordance with the simulations, thereby validating the proposed design theory.

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A Dual-Band Port-Extended Branch-Line Coupler and Mitigation of the Band-Ratio and Power Division Limitations

Cited by 27 publications

References 30 publications

Dual‐band branch‐line coupler with shorted stepped‐impedance stubs arranged in a Π‐shaped topology

Dual‐band branch‐line coupler with shorted stepped‐impedance stubs arranged in a Π‐shaped topology

A Dual Band Branch Line Coupler With Wide Frequency Ratio

Generalized design of a versatile tri‐frequency Wilkinson power divider

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