Compensated 3-dB lange directional coupler in suspended microstrip technique

Janisz, Konrad; Smolarz, Robert; Rydosz, Artur; Wincza, Krzysztof; Gruszczyński, Sławomir

doi:10.1109/mape.2017.8250858

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…However, to achieve relatively strong coupling in a symmetric coupled-line section, the distance between the lines must be relatively small, thus, multi-layer substrate configurations like the broadside-coupled stripline technique are often considered [4,5]. Otherwise, tandem [6,7] or Lange [8,9] configurations may be taken into account.…”

Section: Introductionmentioning

confidence: 99%

Chebyshev-Response Branch-Line Couplers with Enhanced Bandwidth and Arbitrary Coupling Level

2020

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A new approach to the synthesis of broadband branch-line couplers with arbitrary coupling level was investigated in this paper. It was shown that the operational bandwidth of a classic branch-line coupler can be increased by utilizing N-section impedance transformers added to each of the coupler’s ports. Furthermore, the obtained response can be approximated by the Chebyshev polynomial. Moreover, it was proven that for such couplers a range of coupling coefficient values can be obtained by the modification of classic branch-line topology. The analysis of the electrical parameters of the proposed branch-line couplers was comprehensively investigated. To verify the correctness of the proposed design procedures, 3-dB, and 6-dB broadband branch-line couplers operating at the center frequency of 2 GHz having return losses greater than 20 dB were designed, fabricated, and measured.

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Section: Introductionmentioning

confidence: 99%

Chebyshev-Response Branch-Line Couplers with Enhanced Bandwidth and Arbitrary Coupling Level

2020

Self Cite

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“…The multi-layer structure can greatly broaden the bandwidth [13]- [15], but multi-layer structure may increase circuit complexity and cause incompatibility with other components during circuit integration. The Lange coupler [16]- [19], which has been fabricated in a small size on the single layer PCB, has been suggested. Although it has wide band characteristics in a small size, it still has drawbacks that narrow line widths, narrow gaps between coupled lines for the tight coupling, and low power capability depending on substrates, and multiple wire-bonding are required.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of Wideband 90° Microstrip Hybrid Coupler

et al. 2019

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A wideband 90 • microstrip hybrid coupler with a bandwidth of 84.3% is proposed. The hybrid coupler consists of a two-section coupled-line power divider and a 90 • phase shifter. The two-section coupled-line is of natural broadband characteristics, and not only performs the role of impedance matching, but also makes the total circuit compact. The phase shifter employs a pair of open-and short-circuit stubs inserted into the reference transmission line to compensate the phase variation in proportion to the operating frequency for the conventional transmission line. Thus, the phase shifter possesses wideband performance on impedance matching as well as phase shifting. To prove the design methodology, a wideband 90 • hybrid coupler operating at 3 GHz is designed and fabricated. In the case of −15 dB reflection coefficient for all ports of the coupler, the output maximum amplitude unbalance is less than 1 dB, the phase variation is less than 5 degree, and the port isolation is better than 18 dB. INDEX TERMS Wideband hybrid coupler, broadband phase shifter, even-and odd-mode analysis.

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Wideband and low‐profile beam‐tilted H‐plane horn array based on MMPTE

Zhao

Wang

et al. 2022

IET Microwaves Antenna & Prop

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A wideband and low‐profile H‐plane horn antenna array is proposed to achieve a tilted‐beam in H‐plane based on the theory of maximum power transfer efficiency (method of maximum power transfer efficiency (MMPTE)), which is built on bent corrugated substrate integrated waveguide structure. The horn array is implemented in the substrate with the thickness of 0.13 λ0 ${\boldsymbol{\lambda }}_{\mathbf{0}}$ at the centre frequency. The arc‐shaped aperture is employed to achieve smooth transition from horn aperture to the free space, which also improve the front‐to‐back ratio of the radiation pattern. In order to realise a tilted‐beam, MMPTE is used to obtain the excitation distribution of array elements. A double‐layer butler matrix feed network is built based on the calculated excitation, maintaining the characteristic of broadband and miniaturisation simultaneously. Measured VSWR parameter of the proposed antenna is less than 2.0 from 6 to 18 GHz. The antenna achieves a beam titling of ±6° in H‐plane. It is observed that the measured results agree well with the simulated ones.

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Compensated 3-dB lange directional coupler in suspended microstrip technique

Cited by 5 publications

References 7 publications

Chebyshev-Response Branch-Line Couplers with Enhanced Bandwidth and Arbitrary Coupling Level

Chebyshev-Response Branch-Line Couplers with Enhanced Bandwidth and Arbitrary Coupling Level

Analysis and Design of Wideband 90° Microstrip Hybrid Coupler

Wideband and low‐profile beam‐tilted H‐plane horn array based on MMPTE

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