A unifying theory and characterization of microwave oscillator/VCO

Author

Rohde, Ulrich L. ; Poddar, Ajay K. ; Schoepf, Juergen

Author_Institution

Synergy Microwave Corp., Paterson, NJ

fYear

2005

fDate

1-4 May 2005

Firstpage

1539

Lastpage

1542

Abstract

Oscillators/VCOs phase noise is an important concern in RF design. Ultra low noise oscillator sources are crucial for the development of high bit rate wireless link system such as point-to-point radios or multipoint radios. This paper presents an analytical method to optimize phase noise of high Q autonomous circuits (oscillators/VCOs). The key point of this approach is to optimize the conduction angle of the RF current leading to minimum phase noise for a given transistor and resonator. The optimization technique is demonstrated through a design example, leading to an ultra low noise oscillator at 2.4 GHz. The measured phase noise at 1 KHz offset frequency is better than -108 dBc/Hz, and to our knowledge this is best phase noise using ceramic resonator so far reported

Keywords

UHF oscillators; microwave oscillators; voltage-controlled oscillators; 1 kHz; 2.4 GHz; RF design; VCO; high Q autonomous circuits; microwave oscillator; phase noise; ultra low noise oscillator sources; Bit rate; Circuit noise; Design optimization; Frequency measurement; Microwave oscillators; Microwave theory and techniques; Optimization methods; Phase noise; Radio frequency; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2005. Canadian Conference on

Conference_Location

Saskatoon, Sask.

ISSN

0840-7789

Print_ISBN

0-7803-8885-2

Type

conf

DOI

10.1109/CCECE.2005.1557273

Filename

1557273