Title :
An 18dBm transmitter frontend with 29% PAE for 24GHz FMCW radar applications
Author :
Hung, Wei-Hsiu ; Chen, Huan-Sheng ; Chou, Shu-Han ; Lu, Liang-Hung
Author_Institution :
Grad. Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A CMOS transmitter frontend integrated circuit suitable for 24-GHz frequency-modulated continuous-wave (FMCW) radar applications is presented in this paper. With a transformer-based power-combining technique and pseudo-differential class-AB power amplifiers (PAs), the proposed circuit exhibits enhanced output power and efficiency at a nominal supply voltage. In addition, a voltage-controlled oscillator is incorporated for frequency modulation purposes while differential amplifiers are utilized as the driver stages for the PAs to facilitate near-saturation circuit operation. The transmitter frontend is fabricated in a 65-nm CMOS process, demonstrating an output power of 18 dBm and a power-added efficiency (PAE) of 29% at 1.2-V supply voltage.
Keywords :
CMOS analogue integrated circuits; CW radar; FM radar; differential amplifiers; field effect MMIC; microwave oscillators; microwave power amplifiers; power combiners; radar transmitters; voltage-controlled oscillators; CMOS process; CMOS transmitter frontend integrated circuit; FMCW radar applications; PAE; differential amplifiers; efficiency 29 percent; frequency 24 GHz; frequency-modulated continuous-wave radar applications; near-saturation circuit operation; power-added efficiency; pseudo-differential class-AB PA; pseudo-differential class-AB power amplifiers; size 65 nm; transformer-based power-combining technique; voltage 1 V; voltage-controlled oscillator; CMOS integrated circuits; Frequency modulation; Power amplifiers; Power generation; Radar; Transmitters; Voltage-controlled oscillators; CMOS; FMCW; efficiency; power amplifier; transmitter;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium (RFIC), 2012 IEEE
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4673-0413-9
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2012.6242249