Title :
A Closed-Loop Pulsed Power Control Circuit for UWB 24 GHz Automotive Radar Transmitter
Author :
Lu, Yumin ; Gresham, Ian ; Jenkins, Alan
Author_Institution :
Strategic Res. & Dev., M/A-COM Inc., Lowell, MA
Abstract :
This paper presents a closed-loop power control circuit for a UWB pulse radar transmitter. It provides over 10 dB of dynamic power control on a 24 GHz pulsed signal with pulse width of 1.59 nS and duty cycle of 0.5%. The circuit consists of an on-board directional coupler, a three-stage power detector and an error amplifier. All the circuits are integrated on the same chip with the transmitter in a SiGe HBT process. Temperature compensation schemes are applied to improve the circuits temperature stability. The circuit consumes 2.7 mA current and occupies only 360 times 480 mum2
Keywords :
Ge-Si alloys; automotive electronics; bipolar MMIC; circuit stability; closed loop systems; directional couplers; heterojunction bipolar transistors; power control; radar transmitters; road vehicle radar; thermal stability; ultra wideband radar; 2.7 mA; 24 GHz; 360 micron; 480 micron; HBT; SiGe; automotive radar transmitter; circuit temperature stability; closed-loop pulsed control circuit; directional coupler; error amplifier; power control circuit; power detector; ultrawideband radar; Automotive engineering; Directional couplers; Power control; Pulse amplifiers; Pulse circuits; Space vector pulse width modulation; Temperature; Transmitters; Ultra wideband radar; Vehicle dynamics; HBT; SiGe; automotive radar; directional coupler; power control;
Conference_Titel :
Microwave Symposium Digest, 2006. IEEE MTT-S International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9541-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2006.249680
