Broadband Composite Right/Left-Handed Coplanar Waveguide Power Splitters With Arbitrary Phase Responses and Balun and Antenna Applications

Mao, Shau‐Gang; Chueh, Yu-Zhi

doi:10.1109/tap.2005.861574

Cited by 45 publications

(32 citation statements)

References 32 publications

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“…Replacing the -λ/4 transmission line with a 3λ/4 transmission line is not a viable option, as a 3λ/4 transmission line would result in an unacceptable delay time between the two balanced ports in the balun. Our solution is to make the -λ/4 transmission line using a composite right/left-handed (CRLH) transmission line [11][12][13][14][15]. Microstrip, strip-line and coplanar waveguide lines are homogenous trans-mission media.…”

Section: Fabrication and Measurementmentioning

confidence: 99%

A Wilkinson-Type Balun Using a Composite Right/Left-Handed Transmission Line

Park¹

2013

Journal of information and communication convergence engineerin

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A novel balun being the structure of a Wilkinson power divider is suggested and fabricated. One of the power dividing paths in the suggested balun uses a conventional λ/4 transmission line for -90° phase shifting, and the other path uses a composite right/left-handed -λ/4 transmission line for +90° phase shifting with four series capacitors and three parallel inductors. In addition, the suggested balun uses two 50-Ω resistors and a conventional 50-Ω transmission line of λ/2 electrical length between the two output ports, achieving good isolation and reflection values of two balanced ports. The suggested balun is simulated by the advanced design system simulation program and fabricated on TLX-9 20-mil substrate. The fabricated balun has a very good values of S 11 = -27.46 dB, S 21 = -3.40 dB, and S 31 = -3.28 dB, a phase difference of -179.5°, a magnitude difference of 0.12 dB, and a delay difference of 0.1 ns, with S 22 = -36.28 dB, S 33 = -27.19 dB, and S 32 = -25.2 dB at 1 GHz, respectively. Index Terms: Balun, CRLH, Wilkinson-type balunOpen Access J. lnf. Commun.

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Section: Fabrication and Measurementmentioning

confidence: 99%

A Wilkinson-Type Balun Using a Composite Right/Left-Handed Transmission Line

Park¹

2013

Journal of information and communication convergence engineerin

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“…Its characteristic allows it to be widely applied in feeding networks of antennas and high-efficient power amplifiers [4,5]. With the development of radio frequency (RF) technology, the actual requirement for feeding networks is not only unequal power division, but also arbitrary phase difference [6]. Recently, extensive researches about power dividers have been focused on size reduction, high power division and dual-band applications [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…In previous research work, a three-port power divider and phase shifters are connected to realize the function of an unequal power divider and arbitrary phase difference, such as in Butler matrixes, amplifier and mixer [6,10,11]. The main disadvantages of these phase shifters are the intolerable bandwidth reduction and insertion loss.…”

Section: Introductionmentioning

confidence: 99%

A Design of Quasi-Arbitrary Phase Difference Unequal Microstrip Power Divider

He¹,

Meng²,

Lou³

et al. 2016

PIER Letters

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Abstract-An unequal power divider which features quasi-arbitrary output phase difference is proposed in this paper. The circuit consists of four microstrip lines and a resister. By the even-and odd-mode analysis technique, the closed-form design equations of this structure are derived. The characteristic impedances, electrical length and bandwidth variations with power division ratio and phase difference are analyzed. For proving its validity, a prototype with this proposed structure is designed and implemented at 1 GHz. The results of simulation and measurement show that the proposed power divider can effectively produce two outputs with controllable power division and phase difference.

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“…Conventional TLs owns a linear phase response characteristic which leads to considerably large sizes and limited functions. Then Itoh et al proposed a concept of CRLHTLs in [15], which has led to many novel microwave components and antennas for its nonlinear phase response characteristics [16][17][18][19][20][21][22]. However, the balance between left-handed and right-handed frequencybands is highly sensitive to the detailed geometrical dimensions of the CRLH TLs which makes it difficult to design arbitrary phase response by adjusting the length of CRLH TLs.…”

Section: Introductionmentioning

confidence: 99%

Novel Phase-Shifting Characteristic of CRLH Tl and Its Application in the Design of Dual-Band Dual-Mode Dual-Polarization Antenna

Cao¹,

Zhang²,

Liu³

et al. 2012

PIER

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Abstract-The phase-shifting characteristic of a novel composite right/left handed transmission line (CRLH TL) for two frequency points is analyzed in this paper. Samples of (90 • , 0 • ) and (180 • , 0 • ) phase-shifting TLs for two frequency points (f 1 , f 2 ) are deigned and the total length of the CRLH TLs has decreased by more than 77% compared to the conventional microstrip lines. Then a four way power divider made by three Wilkinson power dividers and interconnected with the (90 • , 0 • ) and (180 • , 0 • ) phase-shifting TLs is designed to feed an antenna with two different operating modes at two different frequency bands. Four radiating patches arranging symmetrically in a loop are printed in an upper substrate and connected with the four outputs of the feed network by four copper pins. When the four rectangular patches are excited by four sources with equal amplitude and phase at f 1 , metamaterial antenna with conical beam and linear polarization (LP) is achieved; while four sources with equal amplitude but 90 • phase difference for each adjacent output at f 2 leads to wideband antenna with broadside beam and circular polarization (CP). One antenna prototype with dual-band dual-mode dual-polarization property is fabricated and good agreements between simulation and measurement results are obtained. This single-feed patch antenna is valuable in wireless communications for its radiation pattern selectivity and polarization diversity.

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Broadband Composite Right/Left-Handed Coplanar Waveguide Power Splitters With Arbitrary Phase Responses and Balun and Antenna Applications

Cited by 45 publications

References 32 publications

A Wilkinson-Type Balun Using a Composite Right/Left-Handed Transmission Line

A Wilkinson-Type Balun Using a Composite Right/Left-Handed Transmission Line

A Design of Quasi-Arbitrary Phase Difference Unequal Microstrip Power Divider

Novel Phase-Shifting Characteristic of CRLH Tl and Its Application in the Design of Dual-Band Dual-Mode Dual-Polarization Antenna

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