Title :
Monitoring of atmosphere attenuation in W-band
Author :
Pinhasi, Yosef ; Kapilevich, Boris ; Yahalom, Asher ; Anisimov, Michael ; Litvak, Boris ; Hardon, Danny
Author_Institution :
Dept. of Electr. & Electron. Eng., Ariel Univ. Center of Samaria, Ariel, Israel
Abstract :
The paper describes a system aimed at monitoring variations of the atmospheric attenuation in W-band. It consists of an Rx - Tx module designed and assembled to be used for operating at 95 GHz frequency. The transmitting part of this module includes W-band sources generating 1 W pulse of duration 100 ns. The receiving part consists of the input LNA and balanced mixer driven by LO and IF active detector. Single 48 inches Cassegrain antenna (gain 57 dB and 3 dB beamwidth = 0.1 degrees) is used for both transmission and reception of the signal reflected from the target placed on the distance about 137 m. The azimuth-elevation rotary joint based on overmoded corrugated waveguides was employed in order to provide accurate positioning to this antenna. Examples of monitoring the variations of attenuation during rain fall are presented, too.
Keywords :
computerised monitoring; low noise amplifiers; microwave antennas; microwave propagation; reflector antennas; waveguides; Cassegrain antenna; IF active detector; LNA; LO active detector; W-band; antenna positioning; atmosphere attenuation monitoring; azimuth-elevation rotary joint; module designed; overmoded corrugated waveguides; reflected signal; signal reception; signal transmission; Antennas; Attenuation; Joints; Mixers; Monitoring; Process control; Rain;
Conference_Titel :
Electrical & Electronics Engineers in Israel (IEEEI), 2012 IEEE 27th Convention of
Conference_Location :
Eilat
Print_ISBN :
978-1-4673-4682-5
DOI :
10.1109/EEEI.2012.6377046
