Title :
Extremely high-loop power GHz range surface transverse wave oscillators using AB-class amplifiers
Author :
Avramov, Ivan D.
Author_Institution :
Inst. of Solid State Phys., Sofia, Bulgaria
Abstract :
The authors describe novel microwave feedback power oscillators, stabilized with 1-GHz shear horizontal (SH) surface acoustic wave low-loss resonator devices, dissipating an RF power of more than 1 W in the loop. The loop power of 35 dBm is generated by matched, highly efficient AB-class power amplifiers. A record value of -194 dBc/Hz for the thermal phase noise floor is achieved with a voltage-controlled oscillator (VCO) featuring a tuning range of 1.2 MHz and an efficiency of 19%. When operating as linear, directly frequency-modulated (FM) microwave power transmitters, such VCOs are capable of transmitting data rates exceeding 160 kb/s and 300 kb/s in FM bandwidths of 150 kHz and 600 kHz, respectively
Keywords :
microwave oscillators; phase noise; power amplifiers; surface acoustic wave oscillators; tuning; voltage-controlled oscillators; 1 GHz; 150 kHz; 160 kbit/s; 19 percent; 300 kbit/s; 600 kHz; AB-class power amplifiers; FM bandwidths; VCO; efficiency; frequency modulated microwave power transmitter; microwave feedback power oscillators; shear horizontal resonator; surface acoustic wave low-loss resonator devices; surface transverse wave oscillators; thermal phase noise floor; tuning range; voltage-controlled oscillator; Acoustic waves; Feedback loop; High power microwave generation; Microwave devices; Microwave oscillators; Power generation; Radio frequency; Surface acoustic wave devices; Surface waves; Voltage-controlled oscillators;
Conference_Titel :
Frequency Control Symposium, 1993. 47th., Proceedings of the 1993 IEEE International
Conference_Location :
Salt Lake City, UT
Print_ISBN :
0-7803-0905-7
DOI :
10.1109/FREQ.1993.367469
