64 GHz AlGaAs-HBT oscillator

Aoki, I.; Tezuka, K.; Matsuura, Hiroyuki; Kobayashi, S.; Fujita, T.; Yakihara, T.; Oka, Shinichiro; Miura, Akira

doi:10.1049/el:19960289

Cited by 10 publications

(3 citation statements)

References 2 publications

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“…The millimeter-wave oscillator is celebrated as an example of a fundamental circuit that operates in the millimeter-wave band. Starting in 1990, there have been many reports of millimeter-wave oscillators based on heterojunction bipolar transistors (HBT) and high electron mobility transistors (HEMT) as the speed of these devices has increased [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A 100‐GHz‐band quadruple power combined monolithic HBT oscillator

Uchida

Matsuura

Yakihara

et al. 2003

Electron Comm Jpn Pt II

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SUMMARYIn this paper we discuss a design methodology we used to fabricate a 100-GHz-band monolithic oscillator that power-combines four heterojunction bipolar transistor (HBT) based suboscillators, and the experimental results we obtained. We analyzed the oscillation condition by considering the loop gain when feedback is present, and adjusted the design parameters so as to combine the output powers of four suboscillators by making them oscillate in phase. The active elements we used for the suboscillators were InGaP/InGaAs HBTs with emitter dimensions 1.0 µm × 5.0 µm, for which f T and f max were 190 and 240 GHz, respectively. The signal frequency of the completed oscillator was 97. 4 GHz, its output power +3.0 dBm. The biases on the HBTs were I C = 10 mA and V CE = 2.0 V. In order to discuss the power combining efficiency, we fabricated test oscillators with only one and dual power combined oscillators, which were investigated under the same measurement conditions. These circuits oscillated at 100.5 and 100.4 GHz, respectively, with -3.2 and -0.4 dBm output powers. These results confirm that the output power increases with the number of suboscillators. As far as we know, our article is the first to report a monolithic oscillator that power-combines four suboscillators.

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Section: Introductionmentioning

confidence: 99%

A 100‐GHz‐band quadruple power combined monolithic HBT oscillator

Uchida

Matsuura

Yakihara

et al. 2003

Electron Comm Jpn Pt II

View full text Add to dashboard Cite

show abstract

“…The combination of high cut-offSBDs and HBTs works very well as a hgh-@equency downconverter. This combination can be used fir the integration of other circuits such as an HBT oscillator [7], [8]. Also, HBTs have the ability ofpower handling, so an LO amplifier using the HBTs might be a good choice fbr the frequency converta.…”

Section: Discussionmentioning

confidence: 99%

“…An IF signal with a ftequency lower than that of the LO and RF signals can be de:rived $om any point of the rat-race circuit [5]- [7]. One method of connecting the IF line is via the RF port on the rat-me circuit with a low-pass filter [5].…”

Section: Circuit Configurationmentioning

confidence: 99%