A 1-W high-efficiency Q-band MMIC power amplifier

Chi, J.; Lester, J.A.; Hwang, Y.; Chow, P.D.; Huang, Ming-Chong

doi:10.1109/75.382372

Cited by 17 publications

(4 citation statements)

References 4 publications

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“…and and are given in (3) and (4). The following phasor impedance of the external load network can now be found:…”

Section: Fundamental-frequency Class-e Load Impedancementioning

confidence: 99%

“…By increasing the efficiency of an amplifier from 50% to 90%, the dissipated heat power is reduced by a factor of nine for the same output power. Currently, microwave amplifiers have demonstrated 72% power-added efficiency (PAE) with 1 W of output power at 12 GHz [1], 47% PAE with 0.5 W of output power at 20 GHz [2], and 29% PAE with 1 W of output power at 40 GHz [3]. The goal of this paper is to take advantage of rapid improvements in device technology, enabling design and analysis of very high-efficiency switched-mode power amplifiers.…”

Section: Introductionmentioning

confidence: 99%

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Switched-mode high-efficiency microwave power amplifiers in a free-space power-combiner array

Mader

Bryerton

Markovic

et al. 1998

IEEE Trans. Microwave Theory Techn.

130

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A design-oriented analysis of the microwave transmission-line class-E amplifier is presented. Experiments and harmonic-balance circuit simulations verify the theoretical equations which predict class-E-amplifier output power, maximum frequency of operation, and dc-RF conversion efficiency. Experimental results at 0.5, 1, 2, and 5 GHz are presented. At 0.5 GHz, 83% drain efficiency and 80% poweradded efficiency (PAE) are measured, with an output power of 0.55 W, using the Siemens CLY5 MESFET. These results are compared to a class-A and class-F power amplifier using the same device. At 5 GHz, 81% drain efficiency and 72% PAE are measured, with an output power of 0.61 W, using the Fujitsu FLK052WG MESFET. Finally, the 5-GHz class-E power amplifier is successfully integrated into an active-antenna array, demonstrating power combining of four elements with an 85% power-combining efficiency. At 5.05 GHz, the class-E power-amplifier antenna array delivers a total of 2.4 W of output power, with a dc-RF conversion efficiency of 74% and a PAE of 64%.

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“…and and are given in (3) and (4). The following phasor impedance of the external load network can now be found:…”

Section: Fundamental-frequency Class-e Load Impedancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Switched-mode high-efficiency microwave power amplifiers in a free-space power-combiner array

Mader

Bryerton

Markovic

et al. 1998

IEEE Trans. Microwave Theory Techn.

130

View full text Add to dashboard Cite

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“…where J m is the mth order Bessel function of the first kind, ⌬ϭ 1 Ϫ 2 ,⌬ϭ 10 Ϫ 20 . Here, the first term is the direct laser mixing term while the last two are the optical heterodyne terms.…”

mentioning

confidence: 99%

“…In order to determine the microwave driving power dependence of the heterodyne signal, we have used a semiconductor power amplifier developed by TRW, Inc. 10 It is a pseudomorphic InGaAs high electron mobility transistor ͑PHEMT͒ microwave monolithic integrated circuit ͑MMIC͒ power amplifier with about 12 dB single stage gain from 38 to 44 GHz ͑Q band͒. Two such amplifiers were cascaded to form a two stage power amplifier having a saturated power output close to 30 dBm with about 20 dB associated gain.…”

mentioning

confidence: 99%

Optical heterodyne detection of 60 GHz electro-optic modulation from polymer waveguide modulators

Wang

Chen

Fetterman

et al. 1995

Applied Physics Letters

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An optical heterodyne technique has been used to demonstrate electro-optic modulation up to 60 GHz, the highest reported to date, in polymer waveguide modulators. The frequency response of the device from 40 to 60 GHz was obtained by measuring the frequency down converted modulation signal with a low frequency photodetector. No rolling-off was identifiable from the measured device response, indicating no fundamental material limitations in this frequency range for the polymer material which we used. Such an optical heterdyne system can be a powerful tool for modulator characterization at millimeter wave frequencies because of its high sensitivity and low frequency demands on photoreceivers.

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