Title :
SAW based Delay Locked Loop concept for VCO linearization in FMCW radar sensors
Author :
Christmann, M. ; Vossiek, M. ; Smith, M. ; Rodet, G.
Author_Institution :
Corp. Technol., Siemens AG, Germany
Abstract :
A novel linearization approach for VCOs in FMCW radar sensors is proposed. The principle relies on a SAW delay line that is applied to generate a reference beat signal. With the proposed concept it is possible to realize a Delay Locked Loop that generates a pre-distorted VCO tuning voltage. The system can be realized in CMOS technology. For the verification of the concept a test system was set up where the logic is implemented in a FPGA. In this paper the linearization principle and the test results of the demonstrator are presented.
Keywords :
CW radar; FM radar; delay lock loops; field programmable gate arrays; linearisation techniques; surface acoustic wave delay lines; surface acoustic wave oscillators; voltage-controlled oscillators; CMOS technology; FPGA; SAW based delay locked loop; SAW delay line; VCO linearization; frequency modulated continuous wave radar sensors; predistorted VCO tuning voltage; reference beat signal generation; CMOS logic circuits; CMOS technology; Delay lines; Logic testing; Radar; Signal generators; Surface acoustic waves; System testing; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Microwave Conference, 2003. 33rd European
Print_ISBN :
1-58053-834-7
DOI :
10.1109/EUMC.2003.1262855
