A Novel Unequal Wilkinson Power Divider for Dual-Band Operation

Li, X.; Yang, Ya-Bing; Yang, Long; Gong, Shuxi; Hong, Tao; Chen, X.; Zhang, Y.-J.; Tao, X.; Gao, Yang; Ma, K.; Liu, X.-L.

doi:10.1163/156939310791585990

Cited by 9 publications

(6 citation statements)

References 25 publications

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“…Reliable matching tools typically used are short-ended and open-ended circuit stubs [29][30][31] which are sections of the same type of TLs. Most important properties to be addressed in transistor amplifier design include stability, power gain, VSWR, and noise.…”

Section: Application Of the Bilinear Transforma-tion Approach To Micrmentioning

confidence: 99%

Theoretical Study of Microwave Transistor Amplifier Design in the Conjugately Characteristic-Impedance Transmission Line (Ccitl) System Using a Bilinear Transformation Approach

Silapunt

Torrungrueng²

2011

PIER

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Abstract-Conjugately characteristic-impedance transmission lines (CCITLs) are a class of transmission lines possessing conjugately characteristic impedances (Z ± 0 ) for waves propagating in the opposite direction. A typical Z 0 uniform transmission line is a special case of CCITLs whose argument of Z ± 0 is equal to 0 • . This paper aims to generalize the CCITL system by demonstrating a theoretical study of CCITLs and their applications in the microwave transistor amplifier design. It is found that the bilinear transformation plays an important role in transforming circles in the reflection coefficient Γ 0 -plane in the Z 0 system to the Γ-plane in the CCITL system. In addition, MetaSmith charts, a graphical tool developed for solving problems in the CCITL system, are employed to design matching networks to achieve desired amplifier properties. Results show that stability regions on Meta-Smith charts can be determined, and source and load reflection coefficients can be selected properly to obtain desired operating power gain. In addition, an example shows that Meta-Smith charts offer a simple approach for matching network design using open-circuited single-stub shunt tuners.

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Section: Application Of the Bilinear Transforma-tion Approach To Micrmentioning

confidence: 99%

Theoretical Study of Microwave Transistor Amplifier Design in the Conjugately Characteristic-Impedance Transmission Line (Ccitl) System Using a Bilinear Transformation Approach

Silapunt

Torrungrueng²

2011

PIER

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“…Researchers have proposed several types of power dividers [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] to satisfy the different requirements for dual-band applications. One configuration [12] attaches two central transmission line stubs to a conventional Wilkinson power divider for dual-band responses.…”

Section: Introductionmentioning

confidence: 99%

New Wilkinson Power Dividers Based on Compact Stepped-Impedance Transmission Lines and Shunt Open Stubs

Deng¹,

Guo²,

Kuo³

2012

PIER

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Abstract-This study presents new Wilkinson power dividers using compact stepped-impedance structures and capacitive loads to achieve the required power splitting. This approach can produce additional transmission zeros and effectively suppress the desired stopbands because shunt open stubs realize capacitive loads. This study proposes two equal-split dividers and two unequal-split dividers. For the first equal-split case, one shunt open stub forms the needed capacitor in each transmission path, creating one additional transmission zero in each path. To obtain one more transmission zero in each transmission path, the second Wilkinson power divider uses two shunt open stubs in each path to achieve the same capacitor value as the first divider. This study also tests unequal-split dividers with one and two transmission zeros in each path to confirm that compact stepped-impedance transmission lines and shunt-to-ground capacitors can be utilized in unequal power division.

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“…The Wilkinson power divider has been widely used, and numerous achievements have been published in order to minimize its size [1][2][3] or to achieve unequal power division [4][5][6]. Dualband or wideband power dividers with unequal power division have received growing attention in power divider design [7][8][9][10][11][12][13][14][15][16]. However, the Wilkinson power divider has the shortcoming in high power application, since there is no way in it to transfer the generated heat to the surrounding media [17].…”

Section: Introductionmentioning

confidence: 99%

Compact Wideband Gysel Power Divider With Arbitrary Power Division Based on Patch Type Structure

Zhang¹,

Shi²,

Wei³

et al. 2011

PIER

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Abstract-A novel Gysel power divider based on patch type structure is presented in this paper. The proposed power divider possesses broad bandwidth, small physical occupation and arbitrary power division. More than 30% bandwidth enhancement is achieved based on the −15 dB input return loss criteria, while 55% size reduction is realized compared with conventional Gysel power divider. What's more, flat dividing is obtained in the design without using additional transmission line sections. Based on the novel structure, a design procedure of power dividers with unequal power division ratios is provided without using narrow microstrip line. To verify the design approach, the proposed power dividers with equal and unequal (2:1 and 4:1) power divisions at the centre frequency 1.5 GHz are fabricated and measured. The results demonstrate that the design can fulfil our goals.

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A Novel Unequal Wilkinson Power Divider for Dual-Band Operation

Cited by 9 publications

References 25 publications

Theoretical Study of Microwave Transistor Amplifier Design in the Conjugately Characteristic-Impedance Transmission Line (Ccitl) System Using a Bilinear Transformation Approach

Theoretical Study of Microwave Transistor Amplifier Design in the Conjugately Characteristic-Impedance Transmission Line (Ccitl) System Using a Bilinear Transformation Approach

New Wilkinson Power Dividers Based on Compact Stepped-Impedance Transmission Lines and Shunt Open Stubs

Compact Wideband Gysel Power Divider With Arbitrary Power Division Based on Patch Type Structure

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