Title :
Ku-band push-push VCO using phase shifters
Author :
Tsutsumi, Masanori ; Tanaka, Takayuki ; Aikawa, Masayoshi
Author_Institution :
Saga Univ., Saga
Abstract :
In this paper, a novel push-push VCO using phase shifters is presented. This circuit incorporates the phase shifters into the positive feedback loops that determine the oscillation frequency. The phase shifter consists of a pi/2 hybrid circuit and varactor diodes. By experiment, the developed push-push VCO achieves a comparatively wide tuning frequency range of 390 MHz. The phase noise is -96.2 to -100.2 dBc/Hz at the offset frequency of 1 MHz in 15 GHz band.
Keywords :
feedback; phase shifters; varactors; voltage-controlled oscillators; Ku-band push-push VCO; bandwidth 15 GHz; frequency 1 MHz; frequency 390 MHz; hybrid circuit; oscillation frequency; phase shifter; positive feedback loops; push push oscillator; varactor diodes; voltage controlled oscillator; Circuit optimization; Diodes; Feedback circuits; Feedback loop; Frequency; Phase noise; Phase shifters; Tuning; Varactors; Voltage-controlled oscillators; π/2 hybrid circuit; Doubled-Sided MIC; phase shifter; push-push oscillator; voltage controlled oscillator (VCO);
Conference_Titel :
Microwave Conference, 2006. APMC 2006. Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-4-902339-08-6
Electronic_ISBN :
978-4-902339-11-6
DOI :
10.1109/APMC.2006.4429499
