Compact 5.2-GHz GaInP/GaAs HBT Gilbert upconverter using lumped rat-race hybrid and current combiner

Meng, Chinchun; Wu, Ting-Yi; Lin, Mingchi

doi:10.1109/lmwc.2005.856844

Cited by 19 publications

(7 citation statements)

References 9 publications

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“…The purpose of the current combiner is to transform the differential output of the Gilbert mixer into the single-ended output while doubling the current gain [32]. In general, the performance of a passive LC current combiner at higher frequencies is superior to an active current mirror load because an active current mirror has a limited output voltage swing and cannot respond rapidly at higher frequencies.…”

Section: Millimeter-wave Up-and Down-converter Designs and Measumentioning

confidence: 99%

$Ka/Ku$-Band pHEMT Gilbert Mixers With Polyphase and Coupled-Line Quadrature Generators

Tseng

Meng

et al. 2009

IEEE Trans. Microwave Theory Techn.

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In this paper, three kinds of -band Gilbert mixers are demonstrated using 0.15-m AlGaAs/InGaAs pseudomorphic high electron mobility transistor technology. Thanks to the semiinsulating GaAs substrate, microwave passive components have a low-loss feature, and polyphase filters work up to higher frequencies. Highly accurate tantalum-nitride thin-film resistors utilized in polyphase filters result in perfect quadrature operation. Therefore, our proposed single-sideband up-converter operates at 15 GHz with a 63-dB sideband rejection ratio, and another 34-GHz in-phase/quadrature (I/Q) subharmonic down-converter reaches 0.4-dB magnitude and 1 phase errors. More than 50-dB local oscillator (LO) leakage suppression is achieved in the I/Q subharmonic mixer. On the other hand, a 40-GHz stacked-LO subharmonic mixer with a novel compensation technique is also proposed and demonstrated to improve LO speed and reduce the amount of transistors, as compared to previous work.

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Section: Millimeter-wave Up-and Down-converter Designs and Measumentioning

confidence: 99%

$Ka/Ku$-Band pHEMT Gilbert Mixers With Polyphase and Coupled-Line Quadrature Generators

Tseng

Meng

et al. 2009

IEEE Trans. Microwave Theory Techn.

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“…The IF output buffer consists of a differential shunt-shunt feedback amplifier and a CE-CC buffer to realize a differential-tosingle output stage [8]. The shunt-shunt feedback amplifier is employed to extend the IF bandwidth.…”

Section: If Output Stagementioning

confidence: 99%

Comparison of wideband Gilbert micromixers using SiGe HBT and GaInP/GaAs HBT technologies

Syu

Meng

et al. 2008

Micro & Optical Tech Letters

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Wideband downconversion mixers are demonstrated by using both 0.35‐μm SiGe heterojunction bipolar transistor (HBT) and 2‐μm GaInP/GaAs HBT technologies. A micromixer topology is implemented in the RF port while a differential type shunt–shunt feedback amplifier and a differential‐to‐single CE‐CC output buffer are used in the IF stage. The frequency response analysis and systematic measurement approach for a wideband Gilbert mixer are proposed in this article for each individual stage of local frequency (LO), radio frequency (RF), and intermediate frequency (IF). The differential LO signals are generated by several off‐chip 180° hybrids to cover more than 8:1 bandwidth. The SiGe HBT Micromixer achieves the conversion gain of 6 dB, IP1dB of −17.5 dBm, and IIP3 of −7 dBm with the 3.3‐V supply voltage and the power consumption of 37.5 mW. On the other hand, the GaInP/GaAs HBT Micromixer achieves the conversion gain of 25 dB, IP1dB of −25 dBm, and IIP3 of −15 dBm with the 5‐V supply voltage and the power consumption of 50 mW. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2254–2257, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23642

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“…Recently, the analog circuit design approach at the GHz regime has also gained its ground in the GaAs-based technology [11]. The GaInP/GaAs HBT Gilbert mixers exhibit excellent performance.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of GaAs transformers for RFIC applications

Meng

Teng

Syu

et al. 2008

Micro & Optical Tech Letters

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Compact 5.2-GHz GaInP/GaAs HBT Gilbert upconverter using lumped rat-race hybrid and current combiner

Cited by 19 publications

References 9 publications

$Ka/Ku$-Band pHEMT Gilbert Mixers With Polyphase and Coupled-Line Quadrature Generators

$Ka/Ku$-Band pHEMT Gilbert Mixers With Polyphase and Coupled-Line Quadrature Generators

Comparison of wideband Gilbert micromixers using SiGe HBT and GaInP/GaAs HBT technologies

Characteristics of GaAs transformers for RFIC applications

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