A novel compact-size branch-line coupler

Liao, Shry‐Sann; Sun, Pou-Tou; Chin, N.F.; Peng, Jen-Tee

doi:10.1109/lmwc.2005.855378

Cited by 172 publications

(16 citation statements)

References 11 publications

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“…The proposed balun obtains 35% of size reduction. Thus the balun achieves better return loss and insertion loss and also results in good amplitude and phase imbalance [11][12][13].…”

Section: Resultsmentioning

confidence: 99%

Design of Compact BranchlineBalun

J¹,

Maheswari²

2020

Intelligent Systems and Computer Technology

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This paper present the compact branch line balun to operate at the frequency range of 2.4GHz. The compact branchlinebalun is designed using the substrate material with the dielectric constant of FR4 material. The proposed balun is designed using different transmission lines. Thus the balun should achieves -3dB power division and 1800 phase differences between the outputs. The main objective of this design focuses on size reduction. To reduce the size, A balun is realized using the equivalent T-shape structure. After the reduction techniques the implemented size of the balun is 29.41x44.32 mm2 achieves 35% of size reduction. Thus the measured S11 are -23 dB and the S21,S31 remains -3dB and provide 1790 phase difference between the outputs at the frequency of 2.4GHz.

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“…The proposed balun obtains 35% of size reduction. Thus the balun achieves better return loss and insertion loss and also results in good amplitude and phase imbalance [11][12][13].…”

Section: Resultsmentioning

confidence: 99%

Design of Compact BranchlineBalun

J¹,

Maheswari²

2020

Intelligent Systems and Computer Technology

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“…Harmonic Suppression Size reduction [1] No 0% [2] 2nd 72% [3] No 55% [4] No 63.9% [5] No 60% [6] 2nd 73.2% [8] 3rd 65% [9] No 69% [10] No 62% [11] No 37% This work 2nd & 3rd 41%…”

Section: Refmentioning

confidence: 99%

“…Furthermore, the conventional branchline coupler is not capable of suppressing spurious frequencies. In order to overcome these defects, various methods have been reported in [2][3][4][5][6][7][8][9][10] so far. In [2], a slow-wave branch-line coupler using high-low impedance resonators is designed.…”

Section: Introductionmentioning

confidence: 99%

“…Utilizing these kinds of resonators reduces the circuit size to 28% of the conventional branch-line coupler at 2 GHz and suppresses the second harmonic, too. Two different equivalent circuits of quarterwave length transmission line with T-shaped structure and dual transmission line are applied to the branch-line couplers, in [3] and [4]. Using equivalent T-shaped lines in the structure of the branch-line couplers has reduced the overall surface to 45% and 63.9% of the conventional coupler in [3] and [4], respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Two different equivalent circuits of quarterwave length transmission line with T-shaped structure and dual transmission line are applied to the branch-line couplers, in [3] and [4]. Using equivalent T-shaped lines in the structure of the branch-line couplers has reduced the overall surface to 45% and 63.9% of the conventional coupler in [3] and [4], respectively. However, these methods are not capable of harmonic suppression and they both can only operate around a single frequency of 2 GHz.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Design of Branch-Line Coupler with Harmonic Suppression and Size Reduction Using Closed-Loop and Open-Loop Resonators

Abdipour¹,

Zare²

2017

RADIOENGINEERING

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Accurate design‐oriented simulation‐driven modeling of miniaturized microwave structures

Koziel

Bekasiewicz

2016

Int J Numerical Modelling

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SUMMARYOne of the important prerequisites for efficient design optimization of microwave structures is availability of fast yet reliable replacement models (surrogates) so that multiple evaluations of the structure at hand can be executed in reasonable timeframe. Direct utilization of full-wave electromagnetic (EM) simulations for handling optimizationrelated tasks is often prohibitive. A popular approach to construction of fast surrogates is data-driven modeling. Unfortunately, it normally requires a large number of training samples, and it is virtually infeasible for structures that exhibit highly nonlinear responses (e.g. filters or couplers). In this work, a design-oriented modeling technique is proposed where good accuracy is achieved by careful non-uniform design space sampling that accounts for nonlinear relationship between the operating frequency of the structure and its geometry parameters, as well as carrying out the modeling process only for selected characteristic points of the structure responses (those that determine satisfaction/violation of given design specifications). Our approach is demonstrated using a miniaturized microstrip rat-race coupler modeled in a wide range of geometry parameters and compared to conventional data-driven modeling using kriging interpolation. Design optimization examples are also provided.

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A novel compact-size branch-line coupler

Cited by 172 publications

References 11 publications

Design of Compact BranchlineBalun

Design of Compact BranchlineBalun

A Design of Branch-Line Coupler with Harmonic Suppression and Size Reduction Using Closed-Loop and Open-Loop Resonators

Accurate design‐oriented simulation‐driven modeling of miniaturized microwave structures

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