Title :
A new design approach for low phase-noise reflection-type MMIC oscillators
Author :
Lenk, Friedrich ; Schott, Matthias ; Hilsenbeck, Jochen ; Heinrich, Wolfgang
Author_Institution :
Ferdinand-Braun-Inst. fur Hochsfrequenstech., Berlin, Germany
Abstract :
In this paper, optimization of the loaded quality factor QL for reflection-type heterojunction bipolar transistor (HBT) oscillators is investigated. The main result is an optimum relation between the S-parameter phases at the three transistor ports. A new design strategy for this type of oscillator is proposed. The analysis is verified by comparing several Ka-band monolithic-microwave integrated-circuit oscillators in GaAs HBT technology with different resonators. The measured loaded QL values correspond to the measured phase noise of the circuits. At an oscillation frequency of 33 GHz, an excellent phase noise of -87 dBc/Hz at 100-kHz offset frequency is achieved over the whole tuning range.
Keywords :
III-V semiconductors; MMIC oscillators; Q-factor; S-parameters; bipolar MMIC; circuit optimisation; circuit tuning; gallium arsenide; integrated circuit design; integrated circuit noise; phase noise; 100 kHz; 33 GHz; GaAs; HBT technology; Ka-band MMIC oscillators; S-parameters; circuit optimization; circuit tuning; heterojunction bipolar transistor oscillators; integrated circuit design; low phase noise MMIC oscillators; monolithic microwave integrated circuit oscillators; quality factor; reflection type HBT oscillators; reflection type MMIC oscillators; resonators; transistor ports; Frequency; Heterojunction bipolar transistors; Integrated circuit measurements; MMICs; Noise measurement; Oscillators; Phase measurement; Phase noise; Q factor; Q measurement; Heterojunction bipolar transistors (HBTs); microwave oscillators; monolithic-microwave integrated-circuit (MMIC) oscillators; quality (; voltage-controlled oscillators (VCOs);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2004.837319
