By Topic

Optimization and Realization of a 315-MHz Low-Phase-Noise Voltage-Controlled SAW Oscillator

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Xianhe Huang ; Univ. of Electron. Sci. & Technol. of China, Chengdu, China ; Yan Wang ; Wei Fu

In this paper, the formulation of QL is derived from the analysis of the Butler common-base surface acoustic wave (SAW) oscillator circuit. The prototype 315-MHz Butler SAW oscillator is designed, and phase-noise results before and after adding voltage-control components are measured. The SAW resonator utilized is R315 with an unloaded quality factor Q0 of about 1.06×104. The measured results of phase noise without voltage control are -159 dBc/Hz at 10 kHz and better than -165 dBc/Hz at 100 kHz. After adding the low-voltage varactor BB155, the measured phase-noise results with different control voltages are presented. When only one varactor is added in the actual circuit, the voltage-controlled slope is 4.8 kHz/V, and the measured phase-noise results are better than -155 dBc/Hz at 10 kHz and -165 dBc/Hz at 100 kHz with different control voltages of 4, 6, and 8 V. When two varactors in series are used, the voltage-controlled slope is 9.5 kHz/V, and the measured phase-noise results are better than -155 dBc/Hz at 10 kHz and -165 dBc/Hz at 100 kHz with different control voltages of 4, 6, and 8 V. Experimental results show that the phase-noise level of the 315-MHz voltage-controlled SAW oscillator with a wide voltage-controlled range can be ameliorated based on improving QL.

Published in:

Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:59 ,  Issue: 1 )