DocumentCode :
1177828
Title :
High-efficiency piezoelectric-transducer-tuned feedback microstrip ring-resonator oscillators operating at high resonant frequencies
Author :
Hsieh, Lung-Hwa ; Chang, Kai
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Volume :
51
Issue :
4
fYear :
2003
fDate :
4/1/2003 12:00:00 AM
Firstpage :
1141
Lastpage :
1145
Abstract :
A tunable-feedback ring-resonator oscillator using a voltage-controlled piezoelectric transducer (PET) is introduced. The new oscillator is constructed by a ring resonator with a pair of orthogonal feed lines as a feedback structure. The ring resonator with two orthogonal feed lines can suppress odd modes and operate at even modes. This operation shows a similar characteristic of high operating oscillation frequencies as that of the push-push oscillators. The high operating resonant frequency characteristic is predicted by a simple transmission-line model. The simulated and measured results agree well with each other. At a fixed frequency of 12.09 GHz, the oscillator has a high DC-to-RF efficiency of 48.7% with an output power of 5.33 dBm. A voltage-controlled PET is used to vary the resonant frequencies of the ring resonator, which, in turn, tunes the oscillator with a good tuning rage of 4.25% around 12 GHz. This tuned oscillator operating at high oscillation frequency can be used in many wireless and sensor systems.
Keywords :
circuit tuning; feedback oscillators; microstrip circuits; microstrip resonators; microwave integrated circuits; microwave oscillators; piezoelectric transducers; voltage-controlled oscillators; 12 GHz; 48.7 percent; MIC; SHF VCO; even modes; feedback structure; high operating resonant frequency characteristic; high-efficiency oscillators; microstrip ring-resonator oscillators; orthogonal feed lines; transmission-line model; tunable-feedback ring-resonator oscillator; voltage-controlled piezoelectric transducer; Feedback; Feeds; Microstrip; Optical ring resonators; Piezoelectric transducers; Positron emission tomography; Resonant frequency; Ring oscillators; Transmission lines; Voltage-controlled oscillators;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.2003.809671
Filename :
1193123
Link To Document :
بازگشت