Accurate design of microstrip directional couplers with capacitive compensation

Dydyk, M.

doi:10.1109/mwsym.1990.99647

Cited by 70 publications

(21 citation statements)

References 2 publications

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“…To couple power in specific branch and for precise transmit power monitoring, the directivity and insertion loss (IL) are the two most important performance parameters of any coupler. For enhancement of the directivity, various methods such as using reactive loading methods [20][21][22][23][24], reflected power cancellation [25][26][27], spur-line utilization, metamaterial [28], negative refractive index line [34], etc. have been reported.…”

Section: Resultsmentioning

confidence: 99%

Directivity Enhancement of Miniaturized Directional Coupler using Defected Ground Structure

Bhakhar¹,

Dwivedi²,

Prajapati³

2017

Proceedings of the International Conference on Communication and Signal Processing 2016 (ICCASP 2016)

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Abstract. This research paper investigates about the novel approach in the design and analysis of Couplers operating at 5 GHz, which finds its application for next generation communication systems. The concept of Defected Ground Structure (DGS) in the design of planar coupler is useful for next generation communication systems. The Planar Coupler with an embedded DGS structure is designed for an operating frequency 5 GHz. A convention allow profile planar coupler with an embedded a head dumbbell shaped DGS structure operating at 5 GHz was designed independently and integrated embedded with resonating DGS. The analysis is carried out by varying the dimensions of the DGS. Various electrical performance parameters like transmission coefficient, return loss, coupling factor and isolation have been analytically observed and reproduced for aspirant researchers and designers. The integration of this electromagnetically coupled DGS resulted into significant volumetric reduction of the directional coupler. Incorporating one circular head dumbbell shape reduces the size of ground plane up to 31% while we achieved reduction of 12% in strip-length in comparison to the equivalent conventional coupler. In addition, we found an increase of 127.27% in its directivity compared to conventional counterpart. The effects of variations of DGS dimensions on scattering parameters of this coupler have shown appreciable enhancement. This coupler helps as an inspiration, encouragement and motivation for saving the materials used in designing it, reduces the electrical and RF losses converted into heat and thus a journey towards go-green-earth!

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Section: Resultsmentioning

confidence: 99%

Directivity Enhancement of Miniaturized Directional Coupler using Defected Ground Structure

Bhakhar¹,

Dwivedi²,

Prajapati³

2017

Proceedings of the International Conference on Communication and Signal Processing 2016 (ICCASP 2016)

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“…The techniques to avoid problem of unequal phase velocities in parallel-coupled microstrip lines can be divided into two main classes: lumped and distributed compensation approaches. In the lumped compensation approach [24][25][26], external reactive components are connected between or shunted with the parallel coupled-lines' ports. Major disadvantages of the technique are the parasitic of lumped components and difficulty in layout [24,25].…”

Section: Compensated Lcmentioning

confidence: 99%

“…In the lumped compensation approach [24][25][26], external reactive components are connected between or shunted with the parallel coupled-lines' ports. Major disadvantages of the technique are the parasitic of lumped components and difficulty in layout [24,25]. The distributed approach involves modification of the parallel-coupled line structure [27,28], dielectric layer [29], or ground plane [30] to reduce the difference in phase velocities of both modes.…”

Section: Compensated Lcmentioning

confidence: 99%

Design of lange coupler for MIC and MMIC technology using complementary deformed omega structure

Mishra¹,

Kumar

Mishra

et al. 2011

Int J RF and Microwave Comp Aid Eng

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A novel design for a 3 dB Lange coupler based on complementary deformed omega structure (CDOS) is proposed. Observations, from parametric study for the CDOS based Lange coupler, are provided to aid in the design process. A functional linked artificial neural network has been used to determine the dimensions of the CDOS. Electromagnetic simulations have been validated with experimental results obtained from fabricated prototypes. V C 2011 Wiley Periodicals, Inc. Int J RF and Microwave CAE 22:85-92, 2012.

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“…For the odd mode excitation, capacitive loading is twice of the capacitance [6]. Therefore, the odd mode input impedances at z ϭ 0 and z ϭ l are expressed as follows:…”

Section: Impedance Parametermentioning

confidence: 99%

Compact semilumped bandstop resonators using the capacitively loaded parallel‐coupled microstrip line

Lee¹,

Lee²,

Ryu³

et al. 2006

Micro & Optical Tech Letters

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Accurate design of microstrip directional couplers with capacitive compensation

Cited by 70 publications

References 2 publications

Directivity Enhancement of Miniaturized Directional Coupler using Defected Ground Structure

Directivity Enhancement of Miniaturized Directional Coupler using Defected Ground Structure

Design of lange coupler for MIC and MMIC technology using complementary deformed omega structure

Compact semilumped bandstop resonators using the capacitively loaded parallel‐coupled microstrip line

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