Compact Branch-Line Coupler Using Uniplanar Spiral Based CRLH-Tl

Zhang, Ji; Tao, Jianfeng; Zong, Binfeng; Zhou, Cheng

doi:10.2528/pierl15011414

Cited by 11 publications

(14 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lossless lumped element equivalent circuit model of the proposed CRLH MTM‐TL, shown in Figure , is verified in Gil et al () and Zhang et al (). The lossless equivalent circuit model of the CRLH MTM‐TL essentially resembles a T‐type model, where L represents for the transmission line inductance, and C inter.…”

Section: Mtm‐tl Based On Interdigital Capacitors and Dual‐spiral Indumentioning

confidence: 99%

“…By applying the periodic boundary conditions related to the Bloch‐Floquet theory, the dispersion relation, β , and the characteristic impedance, Z 0 , of the proposed CRLH MTM‐TL structure are given by (Xu et al, ; Yong & Itoh, ; Zhang et al ()

φ = italicβl = {cos}^{- 1} ([], 1 + Z_{s} ((), jω) Y_{p} ((), jω))

Z_{0} = \sqrt{Z_{s} ((), jω) ([], Z_{s} ((), jω) + 2 / Y_{p} ((), jω))}

where l is the length of the simplified lossless CRLH MTM‐TL unit cell in Figure . As the fringe capacitance is negligible it is ignored in this analysis.…”

Section: Mtm‐tl Based On Interdigital Capacitors and Dual‐spiral Indumentioning

confidence: 99%

“…The total size of this antenna is approximately 50 × 55 mm 2 . The structure reported in Zhang et al () operates across over a limited frequency range between 0.99 and1.01 GHz and has dimensions of antenna of 28.4 × 39.75 mm 2 . The structure recently reported in Wang et al () operates at 0.93 GHz and has dimensions of antenna of 52 × 56 mm 2 .…”

Section: Application Of Crlh Mtm‐tl To the Proposed Traveling‐wave Anmentioning

confidence: 99%

See 2 more Smart Citations

Compact Single‐Layer Traveling‐Wave Antenna DesignUsing Metamaterial Transmission Lines

2017

View full text Add to dashboard Cite

This paper presents a single‐layer traveling‐wave antenna (TWA) that is based on composite right/left‐handed (CRLH)‐metamaterial (MTM) transmission line (TL) structure, which is implemented by using a combination of interdigital capacitors and dual‐spiral inductive slots. By embedding dual‐spiral inductive slots inside the CRLH MTM‐TL results in a compact TWA. Dimensions of the proposed CRLH MTM‐TL TWA is 21.5 × 30.0 mm2 or 0.372λ0 × 0.520λ0 at 5.2 GHz (center frequency). The fabricated TWA operates over 1.8–8.6 GHz with a fractional bandwidth greater than 120%, and it exhibits a peak gain and radiation efficiency of 4.2 dBi and 81%, respectively, at 5 GHz. By avoiding the use of lumped components, via‐holes or defected ground structures, the proposed TWA design is economic for mass production as well as easy to integrate with wireless communication systems.

show abstract

Section: Mtm‐tl Based On Interdigital Capacitors and Dual‐spiral Indumentioning

confidence: 99%

φ = italicβl = {cos}^{- 1} ([], 1 + Z_{s} ((), jω) Y_{p} ((), jω))

Z_{0} = \sqrt{Z_{s} ((), jω) ([], Z_{s} ((), jω) + 2 / Y_{p} ((), jω))}

where l is the length of the simplified lossless CRLH MTM‐TL unit cell in Figure . As the fringe capacitance is negligible it is ignored in this analysis.…”

Section: Mtm‐tl Based On Interdigital Capacitors and Dual‐spiral Indumentioning

confidence: 99%

Section: Application Of Crlh Mtm‐tl To the Proposed Traveling‐wave Anmentioning

confidence: 99%

See 1 more Smart Citation

Compact Single‐Layer Traveling‐Wave Antenna DesignUsing Metamaterial Transmission Lines

2017

View full text Add to dashboard Cite

show abstract

“…A compact coupler with discontinuous microstrip lines was reported in [10]. Conventional quarter wavelength lines of this coupler are replaced with compact discontinuous microstrip lines and 60% size reduction is achieved in this work; however, the obtained insertion loss in the pass band is worse than in a conventional coupler.…”

Section: Introductionmentioning

confidence: 90%

A compact branch-line coupler design using low-pass resonators and meandered lines open stubs

2018

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

A compact 1.5 GHz microstrip branch-line coupler with harmonic suppression, using low-pass resonators and meandered lines open stubs, is designed and fabricated in this paper. Both significant size reduction and harmonics suppression are achieved in the proposed structure using U-shape low-pass resonators and meandered lines open stubs.The proposed coupler shows more than 24 dB suppression for harmonics (2nd up to 10th). The proposed coupler size has been reduced by almost up to 81% compared to the typical one. The designed coupler is simulated using Advanced Design System software. The measured results verify the simulation data of the designed coupler.

show abstract

“…Composite right‐/left‐handed TL (CRLH‐TL) are reported in Refs. and . A uniplanar CRLH‐TL utilizing an interdigitated shunt capacitors and a high impedance TL was proposed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized quadrature coupler using low‐cost instant inkjet printing technology

Babale

Rahim

2017

Micro & Optical Tech Letters

View full text Add to dashboard Cite

This article presents the design and implementation of a Miniaturized 3 dB hybrid coupler with low‐cost instant inkjet printing technology. The coupler has a promising potential advantage in applications in antenna beam forming network and feeding networks for phased antenna array. Explicit design equations were derived and used in the design of the coupler. To validate the design procedure, a prototype of the 3‐dB coupler was implemented using the low‐cost instant inkjet silver‐nano printing technology. The responses of the hybrid show that the return loss and isolation are both below −20 dB at the designed frequency. The size reduction of this coupler is 73.7%. However, there is little drop in the bandwidth from that of the conventional coupler. This bandwidth reduction is a payback for the significant size reduction.

show abstract

Compact Branch-Line Coupler Using Uniplanar Spiral Based CRLH-Tl

Cited by 11 publications

References 15 publications

Compact Single‐Layer Traveling‐Wave Antenna DesignUsing Metamaterial Transmission Lines

Compact Single‐Layer Traveling‐Wave Antenna DesignUsing Metamaterial Transmission Lines

A compact branch-line coupler design using low-pass resonators and meandered lines open stubs

Miniaturized quadrature coupler using low‐cost instant inkjet printing technology

Contact Info

Product

Resources

About