A compact arbitrary power division coupler with nonstandard phase-difference

He, Qiang; Qi, Chunchen; Liu, Chao; Lou, Xiaoping; Zhu, Lianqing

doi:10.1080/09205071.2017.1380541

Cited by 2 publications

(1 citation statement)

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“…A two-section hybrid coupler with equal power and adjustable output phase difference is implemented by using reconfigurable transmission line in [28] but suffers with low isolation and higher amplitude imbalance. In [29], a compact arbitrary phase difference coupler with arbitrary coupling coefficients is reported where a shunt stub is connected to one of the branch of the coupler for size reduction. The reported 10 dB return loss and isolation fractional bandwidth is 15% for a 3 dB coupler with phase difference of 45°.…”

Section: Introductionmentioning

confidence: 99%

Arbitrary coupling arbitrary phase couplers with improved bandwidth

Singh

Mandal

2019

IET Microwaves, Antennas & Propagation

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In this study, an arbitrary coupling and arbitrary phase coupler with improve bandwidth is proposed. The proposed couplers use a series stub of electrical length θ at all ports which acts as matching element and thereby improves the effective bandwidth of the coupler. A lossless transmission line model is used to obtain design equations and design graphs. Return loss, isolation, amplitude and phase imbalances all four conditions are considered for bandwidth calculation. Two 3 dB couplers with phase difference of 30° and 45° and the third coupler with 4.77 dB coupling and phase difference of 60° are fabricated and measured to validate the proposed topology. Bandwidth improvement is obtained in all the cases. In some cases, the effective bandwidth is more than 100%.

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Section: Introductionmentioning

confidence: 99%