Low cost and compact directional coupler for ultrawideband applications

Micro & Optical Tech Letters

et al. 2013

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An extended works of a diamond shaped 3 dB coupler design that is operating in ultra‐wideband frequency range is presented in this article. The proposed design is accomplished by using multilayer technology in which the structure is formed by three layers of conductors and interleaved by a layer of substrate between each one of the conductor layer. The proposed designed coupler simulation result shows that the design exhibits a coupling of 3 dB return loss and isolation better than 22 and 21 dB, respectively. Whereas, the phase difference performance is in the range of 90° ± 2° over the designated band. The coupler is fabricated and measured. Analysis studies on the parametric value are presented and discussed to observe the effect of the dimension of the patch to the performance of the coupler. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2214–2219, 2013

Section: Resultsmentioning

confidence: 75%

“…As shown in Refs. and , Eqs. were used to calculate the value of the width and the length of the designed coupler.…”

Section: Design and Analysismentioning

confidence: 99%

Compact Uwb Multilayer 3 Db Directional Coupler Design And Analysis on Coupler Performances

Micro & Optical Tech Letters

et al. 2013

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“…Difference value of the dimension even with 0.1 mm dissimilarity will led to different performance as in this case, the S11 is shifted slightly to the left. Besides, recent literature review shows that air gap [22] and misalignment [23] problems gives big impact on the performances of the multilayer technology devices. Comparison between simulation and measurement results for the proposed square-shaped phase shifter with the step impedances in terms of (a) scattering parameter and (b) phase difference between output ports.…”

Section: Resultsmentioning

confidence: 99%

Design of ultra wideband phase shifter with improved scattering parameter performances

2016 International Conference on Advances in Electrical, Electronic and Systems Engineering (ICAEES)

et al. 2016

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Abstract-Aiming to achieve Ultra Wideband (UWB) performance, this paper presents an improvement of the squareshaped phase shifter design, which covers from 2.8 GHz to 10.6 GHz by implementing step impedances in order to improve the impedance matching of the phase shifter, whilst leads to better scattering parameter results. The phase shifter design is formed by using multilayer technique where 3 layers of conductors are interleaved with 2 layers of substrates between each of the conductor's layer. This technique ensures the phase shifter design to be small in size. Computer Simulation Technology (CST) Microwave Studio is used in developing the design and optimization stage. Meanwhile the measurement is done by using Vector Network Analyzer (VNA). The square-shaped phase shifter with step impedances enhances the bandwidth up to 34% as compared to the conventional square-shaped phase shifter. Additionally, analysis on air gap and alignment is also presented in order to show how both conditions affect the performance of the proposed phase shifter design.

“…There are several reasons that may cause the manufactured coupler not performing well compared to the simulation result. Previous literature review had stated that the existence of air gap between two layers can cause a big impact on coupler's performance [11]. Glue is being used in the manufactured of the coupler to reduce the effect of air gap and misalignment.…”

Section: Results and Analysismentioning

confidence: 99%

A design of octagon‐shaped 3‐dB ultra wideband coupler using multilayer technology

Micro & Optical Tech Letters

et al. 2012

A design of a 3‐dB ultra wideband (UWB) coupler with compact size (35 mm × 15 mm), which operates between 3.1 and 10.6 GHz is presented in this article. The proposed design is accomplished by using multilayer microstrip structure, which is formed by three layers of conductor and two layers of substrate. The top and bottom layers consist of an octagon‐shaped microstrip lines and an octagon‐shaped slot in the middle layer. The design was fabricated on Rogers RO4003c substrate. Both of the simulation and measurement results are being compared with verify the coupler's performances in real environment. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:127–130, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27259