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🏛️國立陽明交通大學機構典藏

Author: search.filters.author.Chang, Chia-HungSubject: search.filters.subject.Marchand balun

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Now showing 1 - 3 of 3
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    Broadband Gilbert micromixer with an LO Marchand balun and a TIA output buffer
    (2006)
    Tseng, Sheng-Che
    ;
    Meng, Chinchun
    ;
    Chang, Chia-Hung
    ;
    Wu, Chih-Kai
    ;
    Hung, Guo-Wei
    A single-ended wideband downeonversion Gilbert micromixer is demonstrated in this paper using 0.35-um SiGe BiCMOS technology. Because of the wideband matching property of the micromixer, it can perform broad frequency translation. The TIA is utilized in the IF stage while a broadband Marchand balun is employed not only to generate differential LO signals but also to reserve the wideband operation of the mixer. This singleended wideband mixer has the conversion gain of 15 dB, IP(1dB) of 17 dBm, and IIP(3) of -6.5 dBm and works from 3.5 to 14.5 GHz. The input return loss is below -14 dB and the chip size is 1x1 mm(2).
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    Item type:Item,
    SiGe HBT Gilbert downconverter with an integrated miniaturized Marchand balun for UWB applications
    (2007)
    Tseng, Sheng-Che
    ;
    Meng, Chinchun
    ;
    Chang, Chia-Hung
    ;
    Huang, Guo-Wei
    ;
    電信工程研究所
    A 15.5-dB conversion gain 0.35-mu m SiGe HBT Gilbert mixer with the lumped-element Marchand balun for 3.1 GHz to 10.6 GHz UWB applications is implemented using standard silicon processes. This mixer has the 1.5-GHz IF 3-dB bandwidth as well as the 15.8-dB noise figure. The balun size is only 0.25 mm x 0.5 mm. Because of the balanced structure of the Marchand balun, the magnitude imbalance and phase difference of outputs are below 1 dB and about 184 degrees, respectively. In the present of a lossy substrate, the dissipated loss of the balun is still less than 4 dB thanks to the advantage of the lumped-element technique. The total current consumption of the entire mixer is 13.9 mA at 5 V voltage supply while the chip size including probing pads is 1 mm x 0.9 mm.
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    Item type:Item,
    Monolithic broadband Gilbert micromixer with an integrated Marchand balun using standard silicon IC process
    (2006-12-01)
    Tseng, Sheng-Che
    ;
    Meng, Chinchun
    ;
    Chang, Chia-Hung
    ;
    Wu, Chih-Kai
    ;
    Huang, Guo-Wei
    A single-ended wideband downconversion Gilbert micromixer is demonstrated in this paper using 0.35-mu m SiGe BiCMOS technology. A transimpedance amplifier with resistive feedback is utilized in the IF stage while a broadband Marchand balun is employed to generate wideband differential local oscillator signals. The planar Marchand balun topology employed in this paper can generate truly balanced signals even in the presence of the lossy low-resistivity (similar to 10 Omega (.) cm) silicon substrate. A systematic approach to measure the frequency response of each individual stage in a Gilbert mixer is developed in this paper. This single-ended wideband mixer has the conversion gain of 15 dB, IP1dB of -19 dBm, IIP3 of -7 dBm, and the noise figure of 13 dB. The mixer works from 3.5 to 14.5 GHz.