Multi-section branch-line crossover/coupler optimization for wideband applications and higher-order harmonics suppression

Shamaileh, Khair Al; Hussein, Osama; Dib, Nihad; Nosrati, Amir; Devabhaktuni, Vijay

doi:10.1016/j.aeue.2020.153269

Cited by 6 publications

(12 citation statements)

References 29 publications

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“…Compared with the harmonic suppression coupler in Reference 24, the proposed coupler shows wider bandwidth. While a size reduction of 84% is obtained when compared with 26 . In Reference 13, the bandwidth of more than 50% is obtained by replacing the horizontal branch of the cascaded three‐section BL coupler with high‐impedance‐line and coupled‐line loaded transmission line.…”

Section: Implementation and Measurementsmentioning

confidence: 99%

“…Thus, couplers with harmonic suppressions are emerged. [23][24][25][26] In References 23, a wideband harmonic suppressed 10 dB BL coupler using cascaded symmetric PI sections is presented. Owning to the cascading and PI sections, the bandwidth reaches 52%, and up to 4th harmonic is suppressed.…”

Section: Introductionmentioning

confidence: 99%

“…In Reference 25, coupled‐line based transmission line topology is proposed for size reduction of BL couplers with harmonic suppression. In Reference 26, multi‐section BLs based on an optimization‐driven framework are proposed for wideband and odd harmonic suppression. However, the bandwidths in References 24–26 are limited (about 10%) unless cascading of multi‐section is applied.…”

Section: Introductionmentioning

confidence: 99%

“…In Reference 26, multi‐section BLs based on an optimization‐driven framework are proposed for wideband and odd harmonic suppression. However, the bandwidths in References 24–26 are limited (about 10%) unless cascading of multi‐section is applied.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, to improve the signal‐to‐noise ratio of the system, the spurious and harmonic bands in microwave devices need to be suppressed. Thus, couplers with harmonic suppressions are emerged 23–26 . In References 23, a wideband harmonic suppressed 10 dB BL coupler using cascaded symmetric PI sections is presented.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Compact wideband and harmonic suppressed quadrature coupler using susceptance loaded coupled lines

Liu

Guan

Zhang

et al. 2021

Micro & Optical Tech Letters

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In the paper, a novel type of quadrature coupler with the features of wideband, arbitrary harmonic suppression and small size is proposed, for the first time, by employing susceptance loaded coupled lines. Design equations are derived using the even-odd mode decomposition analysis. The discussions on arbitrary couplings and harmonic suppressions are also investigated. For demonstration, a prototype with a second harmonic suppression was fabricated and measured. The overall size is 0.19λ g Â 0.27λ g , which is smaller than most of the reported wideband quadrature couplers. Measurement results show that the fractional bandwidth of 40% is obtained under the condition of 15-dB return loss/isolation, 1-dB amplitude imbalance, and 90 AE 5 phase difference. The proposed coupler can be a good candidate for wideband applications without using the multi-cascading and complex miniaturization method.

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Section: Implementation and Measurementsmentioning

confidence: 99%