Impedance-Varying Broadband 90° Branch-Line Coupler With Arbitrary Coupling Levels and Higher Order Harmonic Suppression

Alshamaileh, Khair; Devabhaktuni, Vijay; Dib, Nihad

doi:10.1109/tcpmt.2015.2449258

Cited by 24 publications

(17 citation statements)

References 25 publications

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“…Although the couplers with unequal power division and harmonic suppression were designed in Refs. , they have some limitations in applications. Extra lumped inductors were used in Ref.…”

Section: Experiments and Resultsmentioning

confidence: 99%

“…The design in Ref. can provide large PDR. However, it occupies larger area and provides no closed‐form design formulas.…”

Section: Experiments and Resultsmentioning

confidence: 99%

“…These designs only deal with equal power division. Only a few attempts have contributed to both harmonic suppression and unequal power division . However, the maximum power division ratio (PDR) of the coupler proposed in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. , an interesting wideband unequal power division branch‐line coupler was proposed, but it occupies a large area of

0.25 λ_{normalg} \times 0.75 λ_{g}

.…”

Section: Introductionmentioning

confidence: 99%

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Arbitrary power division quadrature branch‐line coupler with harmonic suppression

Gai

Jiao

Zhao

2017

Micro & Optical Tech Letters

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A planar branch‐line coupler with arbitrary power division and harmonic suppression is proposed. A novel offsetting double‐side parallel‐strip T‐section is used for designing the coupler. To verify the design procedure, a prototype operating at 1.76 GHz with 10 dB power division ratio and a stopband up to nearly four times of the center frequency is simulated, fabricated and tested. The measured results agree well with the simulated ones.

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“…Although the couplers with unequal power division and harmonic suppression were designed in Refs. , they have some limitations in applications. Extra lumped inductors were used in Ref.…”

Section: Experiments and Resultsmentioning

confidence: 99%

“…The design in Ref. can provide large PDR. However, it occupies larger area and provides no closed‐form design formulas.…”

Section: Experiments and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In Ref. , an interesting wideband unequal power division branch‐line coupler was proposed, but it occupies a large area of

0.25 λ_{normalg} \times 0.75 λ_{g}

.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Arbitrary power division quadrature branch‐line coupler with harmonic suppression

Gai

Jiao

Zhao

2017

Micro & Optical Tech Letters

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“…The effective dielectric constant, εeff, of each section is calculated using the well-known microstrip line formulas [15]. Furthermore, the non-uniform impedance profile is governed by a truncated Fourier series that is expressed as [16]:…”

Section: A Even Mode Analysismentioning

confidence: 99%

Wideband impedance-varying n-way wilkinson power divider/combiner for rf power amplifiers

Hussein

Shamaileh

Devabhaktuni

et al. 2016

2016 88th ARFTG Microwave Measurement Conference (ARFTG)

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-We propose a compact wideband multi-way power divider/combiner with planar structure for applications to RF power amplifiers (PAs). Uniform transmission lines in the conventional divider are replaced with non-uniform transmission lines (NTLs), which are governed by a truncated Fourier series. An optimization-driven framework is employed in even-mode analysis to obtain the coefficients of the NTLs considering predefined operating bands, whereas three isolation resistors are optimized in the odd-mode analysis to achieve optimal isolation and output port matching over the design bandwidth. For verification purposes, a 4-10 GHz 3-way divider is simulated, and measured. Simulations and measurements are in close proximity and show input/output ports matching of better than -10 dB and transmission of -4.9 ±1 dB across the design bandwidth.Index Terms -multi-way power divider, non-uniform transmission lines (NTLs), power amplifiers (PAs), power combiner, wideband Wilkinson power divider (WPD).

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General design of impedance‐varying multi‐way Wilkinson power divider with bandwidth redefinition characteristics

Hussein

Shamaileh

Devabhaktuni

2017

Int J. RF Microw. Comput. Aided Eng.

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In this article, a general design methodology of a multi‐way compact equal split Wilkinson power divider (WPD) with bandwidth redefinition characteristics and planar structure is proposed. Quarter‐wave matching uniform transmission lines in the conventional design are replaced with non‐uniform transmission lines (NTLs) governed by a truncated Fourier series. Even mode analysis is adopted to obtain NTLs with predefined bandwidth functionalities; whereas several isolation resistors are optimized in the odd mode analysis to achieve proper isolation and output ports matching over the frequency range of interest. Compactness is achieved by incorporating only one quarter‐wave wideband NTL transformer, with a length computed at the center frequency, in each arm. Two 3‐way WPDs with different frequency bands (i. e., 5‐9 GHz and 4‐10 GHz) and one 5‐9 GHz 4‐way divider examples are designed and simulated. Furthermore, a wideband 3‐way WPD operating over 4‐10 GHz band is fabricated and measured. Results show input and output ports matching and isolation below −15 dB, and transmission parameters in the range of [–4.9,–6.2] dB and [–6,–7.5] dB across the operating band of the 3‐way and 4‐way WPDs, respectively.

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Impedance-Varying Broadband 90° Branch-Line Coupler With Arbitrary Coupling Levels and Higher Order Harmonic Suppression

Cited by 24 publications

References 25 publications

Arbitrary power division quadrature branch‐line coupler with harmonic suppression

Arbitrary power division quadrature branch‐line coupler with harmonic suppression

Wideband impedance-varying n-way wilkinson power divider/combiner for rf power amplifiers

General design of impedance‐varying multi‐way Wilkinson power divider with bandwidth redefinition characteristics

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