Title :
A 60-GHz-band subharmonically injection locked VCO MMIC operating over wide temperature range
Author :
Kishimoto, Shuya ; Maruhashi, Kenichi ; Ito, Masaharu ; Morimoto, Takao ; Hamada, Yasuhiro ; Ohata, Keiichi
Author_Institution :
Syst. Devices Res. Labs., NEC Corp., Shiga, Japan
Abstract :
A 60-GHz-band subharmonically injection locked VCO MMIC is developed for a local signal source. The VCO outputs a 2nd harmonic of an oscillating frequency, using a 2nd subharmonic as an injection signal to obtain a high output power and a wide locking range. The overall frequency multiplication factor is 4. Besides, to suppress an oscillating frequency fluctuation against an ambient temperature change, a simple temperature-compensation bias circuit is connected to a varactor diode. It is tested mounting on an LTCC package by a flip-chip technique. A locking range of 760 MHz and an output power of 1 dBm are obtained at the injection power of 2 dBm. For a temperature range from 0°C to 80°C, a locking range reaches to 450 MHz due to the temperature-compensation bias circuit.
Keywords :
MMIC oscillators; compensation; flip-chip devices; injection locked oscillators; varactors; voltage-controlled oscillators; 0 to 80 C; 60 GHz; LTCC package; flip-chip technique; local signal sources; oscillating frequency fluctuation; oscillating frequency harmonics; oscillating frequency subharmonics; subharmonic injection locked VCO MMIC; temperature-compensation bias circuit; varactor diodes; voltage controlled oscillators; Circuits; Diodes; Fluctuations; Frequency conversion; MMICs; Power generation; Power system harmonics; Temperature distribution; Varactors; Voltage-controlled oscillators;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1517039
