A New X-Band Low Phase-Noise Multiple-Device Oscillator Based on the Extended-Resonance Technique

• Published in: IEEE transactions on microwave theory and techniques Vol. 55; no. 8; pp. 1642 - 1648
• Main Authors: Jonghoon Choi, Mortazawi, A.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.08.2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Circuit properties; Circuit testing; Circuits; Delay; Electric, optical and optoelectronic circuits; Electronic circuits; Electronics; Exact sciences and technology; Extended resonance; Frequency measurement; Germanium silicon alloys; Group delay; Heterojunction bipolar transistors; Microwave and submillimeter wave devices, electron transfer devices; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Microwave oscillators; Microwaves; Noise; Noise measurement; Optimization; oscillator noise; Oscillators; Oscillators, resonators, synthetizers; Phase measurement; Phase noise; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Silicon germanides; Silicon germanium; X-band; Phase noise; Performance evaluation; Semiconductor alloys; oscillator noise; Microwave device; Coupled oscillator; Low noise circuit; Free oscillation; X band; Microwave; Centimetric wave; Optimization; Extended resonance; Microwave oscillator; microwave oscillators; Microwave resonator; Heterojunction bipolar transistors; Resonance technique; Group delay; Planar technology
• ISSN: 0018-9480; 1557-9670
• DOI: 10.1109/TMTT.2007.901612

A novel multiple-device oscillator based on the extended-resonance technique is proposed. This oscillator achieves low phase noise through optimizing the circuit's group delay. Based on this technique, an X-band four-device SiGe HBT oscillator has been designed, fabricated, and tested. The measured phase noise is - 119 dBc at 100-kHz offset frequency. To the authors' best knowledge, this oscillator shows the lowest phase-noise performance among other reported X-band microwave planar hybrid free-running oscillators.