Design and Performance of X-Band Oscillators with GaAs Schottky-Gate Field-Effect Transistors

Maeda, M.; Kimura, K.; Kodera, H.

doi:10.1109/tmtt.1975.1128645

Cited by 59 publications

(12 citation statements)

References 14 publications

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“…However, oscillators designed for maximum output power achieve the highest efficiency by reducing the drain current to Class-AB operation, i.e., -. Maeda recognized these two conditions on early research with MESFET oscillators [12], and this trend is found in many published MESFET oscillator papers.…”

Section: Introductionmentioning

confidence: 87%

“…The oscillation condition requires that (1) where and are the impedances looking into the drain port of the oscillator and and are the impedances looking into the load circuit. To be more specific, is negative when oscillating, and is usually designed to be approximately three times larger in magnitude than for maximum output power [12].…”

Section: Oscillator Designmentioning

confidence: 99%

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High-efficiency Ku-band oscillators

McSpadden

Fan

Chang

1998

IEEE Trans. Microwave Theory Techn.

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Ku-band oscillators have been experimentally found to have a high dc-to-radio-frequency (RF) efficiency. Using a packaged pseudomorphic high electron-mobility transistor (pHEMT) device, a maximum efficiency of 60% was measured at 14.5 and 15 GHz with output powers of 16 and 23 mW, respectively. Oscillator circuits also revealed efficiencies of 48% at 16 GHz and 41% at 17.1 GHz with RF output power levels of 11 and 13 mW, respectively.

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Section: Introductionmentioning

confidence: 87%

Section: Oscillator Designmentioning

confidence: 99%

High-efficiency Ku-band oscillators

McSpadden

Fan

Chang

1998

IEEE Trans. Microwave Theory Techn.

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“…Fig. 3 shows the simulation results of the reflection coefficient that the real value of S11(-1.813+j0.937) is larger than 1 in the Smith chart [9]- [10].…”

Section: Design Of An Mmic Vco Based On a Clappgouriet Oscillatormentioning

confidence: 99%

The MMIC VCO Design for Wireless Systems at Ka-Band

Lee¹,

Kim²

2010

Journal of Electrical Engineering and Technology

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-Reconfigurable radio technology is needed to reconstruct frequency and modem functionality, which can be different in various regions. In addition, it makes a single mobile handset capable of supporting various standards of wireless communication and thus plays a key role in mobile convergence. An MMIC VCO (voltage controlled oscillator) has been developed for high power and wide bandwidth where Clapp-Gouriet type oscillators are adapted for series feedback, and was fabricated based on 0.15um pHEMT of TRW. The MMIC VCO was connected to an aluminar substrate on the carrier for testing. This MMIC VCO module showed good performance in comparison to existing works. Furthermore, it can be potentially extended to reconfigure an MMIC VCO for wireless systems such as military applications and satellite communications.

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“…Instead, output-matching stubs were tuned to meet the small-signal oscillation condition derived in [6]. The designed cell was used as a fundamental frequency selection and harmonic-suppression component of an oscillator circuit.…”

Section: Design Of a Harmonic Suppressed Oscillatormentioning

confidence: 99%

Novel oscillator incorporating a compact tunable resonant cell with high efficiency and superior harmonic characteristics

Hwang

Myung

2006

Microw. Opt. Technol. Lett.

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This paper presents a novel microwave oscillator incorporating a simple microstrip ring-type resonant cell as its terminating resonance component. Reduced chip size, higher DC-AC power efficiency, and superior harmonic characteristics can be achieved from the introduction of this type of compact microstrip ring resonator cell. The oscillator provides a second harmonic suppression of 26.51 dB and an output power of 2.046 dBm, with 28% efficiency at an oscillation frequency of 2.11 GHz.

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Design and Performance of X-Band Oscillators with GaAs Schottky-Gate Field-Effect Transistors

Cited by 59 publications

References 14 publications

High-efficiency Ku-band oscillators

High-efficiency Ku-band oscillators

The MMIC VCO Design for Wireless Systems at Ka-Band

Novel oscillator incorporating a compact tunable resonant cell with high efficiency and superior harmonic characteristics

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