Title :
A high precision square law detector in digital microwave radiometer
Author :
Pei, Xin ; Chen, Maozheng ; Yan, Hao ; Li, Jian ; Liu, Xiaohong
Author_Institution :
XinJiang Astron. Obs., Chinese Acad. of Sci., Urumqi, China
Abstract :
A new square law detector has been developed for digital microwave radiometer. It has a wider dynamic range and a more accurate square law response than has been available in the past. Experimental results show that the voltage sensitivity is higher than 0.9mV/uW and the linearity error is less than 0.3% in the frequency range from 100MHz to 2GHz and power range from -50dBm to -20dBm. Another advantage of the detector is its flatness, by selected a best type of diodes. Detailed detection circuit and measurement system have been given in this paper.
Keywords :
astronomical techniques; astronomical telescopes; diodes; radioastronomy; radiometry; Nanshan radio telescope; detection circuit; digital microwave radiometer; diodes; frequency 100 MHz to 2 GHz; high precision square law detector; voltage sensitivity; Detectors; Microwave circuits; Microwave measurements; Microwave radiometry; Schottky diodes; Sensitivity; Digital microwave radiometer; Microwave power measurement; Radio astronomy; Schottky diode; Square law detector;
Conference_Titel :
Communication Software and Networks (ICCSN), 2011 IEEE 3rd International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-61284-485-5
DOI :
10.1109/ICCSN.2011.6014425
