Design of a Novel 3db Microstrip Backward Wave Coupler Using Defected Ground Structure

Sharma, Rohit; Chakravarty, Tapas; Bhooshan, Sunil; Bhattacharyya, and A. Bhushan

doi:10.2528/pier06100502

Cited by 65 publications

(38 citation statements)

References 15 publications

(14 reference statements)

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“…Slow-wave effect caused by the equivalent LC components is one of the advantages of DGS. With compared to the conventional lines, the transmission lines integrated with DGS having much higher impedance and increased slow wave factor which helps the reduction of the circuit [17].…”

Section: Fig 1 Geometry Of the Proposed Directional Couplermentioning

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: Fig 1 Geometry Of the Proposed Directional Couplermentioning

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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“…In order to enhance the performance of the antenna, a simple rectangular DGS is considered [8][9][10][11][12][13]. DGS can constrain the superficial currents, and let the extensive-distributing currents in the ground converge near the two ends of the defected rectangle.…”

Section: Defected Ground Structurementioning

confidence: 99%

Broadband Radar Cross Section Reduction of a Rectangular Patch Antenna

Zhao¹,

Wang²,

He³

2008

PIER

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Abstract-A rectangular patch antenna with two circular apertures, a defected ground structure (DGS), and a shorting post is proposed in this paper. The novel structure can reduce the radar cross section (RCS) of the antenna at its operating frequency. At the same time, the return loss of the proposed antenna is maintained, and the RCSs of the patch antenna at the frequencies outside the operating band are also reduced. The proposed antenna is simulated by using high frequency electromagnetic simulation software. The peak of RCSs is reduced about 7 dB and the broadband RCSs are below −30 dB from 2 to 8 GHz. This result is useful for low-RCS antenna application.

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“…DGS is realized by etching a defective pattern in the ground plane [17], which disturbs the shield current distribution in the ground plane. This disturbance can change the characteristics of a transmission line such as equivalent capacitance and inductance to obtain the slow-wave effect and band-stop property.…”

Section: Srr Dgsmentioning

confidence: 99%

Design of Novel Dual-Band Bandpass Filter With Microstrip Meander-Loop Resonator and CSRR DGS

Wu¹,

Mu²,

Dai³

et al. 2008

PIER

134

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Abstract-A novel dual-band bandpass filter with meander-loop resonator and complement split-ring resonator (CSRR) defected ground structure (DGS) is proposed in this letter. Microstrip meanderloop resonator and CSRR DGS are operated for respective passbands. Several finite attenuation poles in stopbands are realized to improve the selectivity of the proposed bandpass filter and isolation between the two passbands. Compact size, dual band and high selectivity characteristics are realized by this type of filter structure. The filter is evaluated by experiment and simulation with very good agreement.

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Design of a Novel 3db Microstrip Backward Wave Coupler Using Defected Ground Structure

Cited by 65 publications

References 15 publications

Directivity Enhancement of Miniaturized Directional Coupler using Defected Ground Structure

Directivity Enhancement of Miniaturized Directional Coupler using Defected Ground Structure

Broadband Radar Cross Section Reduction of a Rectangular Patch Antenna

Design of Novel Dual-Band Bandpass Filter With Microstrip Meander-Loop Resonator and CSRR DGS

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