Title :
Array of coupled phase-locked oscillators at 160 GHz
Author :
Geist, T. ; Hartfuss, H.-J.
Author_Institution :
Max-Planck-Inst. fur Plasmaphys., Garching bei Munchen, Germany
fDate :
6/1/1996 12:00:00 AM
Abstract :
A ten-channel millimeter-wave heterodyne phase measurement system is currently under construction. This system will be used for electron density measurement at the plasma experiment W7-AS. The main features are: (1) twofold usage of each 160-GHz oscillator to excite both the transmitting signal to the plasma and the local oscillator (LO) signal for downconversion and (2) the phase-locked loops (PLL´s) of each oscillator are coupled in a chain. The authors describe the millimeter-wave part and the digital PLL circuits of that system. Test results of the first three channels, which are already running in the laboratory, are presented
Keywords :
Gunn oscillators; digital phase locked loops; millimetre wave measurement; millimetre wave oscillators; phase locked oscillators; phase measurement; plasma diagnostics; synchronisation; 160 GHz; EHF; LO signal; MM-wave heterodyne phase measurement; W7-AS plasma experiment; coupled phase-locked oscillators; digital PLL circuits; downconversion; electron density measurement; local oscillator signal; millimeter-wave phase measurement; oscillator array; phase-locked loops; ten-channel phase measurement system; transmitting signal; Coupling circuits; Density measurement; Electrons; Local oscillators; Millimeter wave measurements; Phase locked loops; Phase measurement; Phased arrays; Plasma density; Plasma measurements;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
