Main Page
About Science
Faculty Deanship
Letter of Dean
Overview of Deanship
Vice Deans
Vice Dean
Letter of Vice-dean
Overview of Vice-deanship
Vice Dean for Graduate Studies
Letter of Vice Dean for Graduate Studies
Overview of Vice Dean of Postgraduate Studies
Research and Innovation Unit
Vice Dean for Girls Campus
Faculty Management
Letter of Managing Director-Boys Campus
Letter of Managing Director-Girls Campus
Overview of Management
Educational Affairs
Males Campus
Staff
Females Campus
Contact Us
Research
عربي
English
About
Admission
Academic
Research and Innovations
University Life
E-Services
Search
Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
Construction and Demonstration of a Coherent Doppler Radar
Construction and Demonstration of a Coherent Doppler Radar
Subject
:
physics
Document Language
:
English
Abstract
:
This article reports work on constructing a coherent Doppler radar using optical heterodyne detection principle to detect weak signals. Various independent factors and conditions of operation influencing this system were inspected. These factors are: A: local oscillator power, that demonstrated considerable influence on the beating frequency ability rising. It is established that its amount should essentially be few times bigger than the reflected signal from the moving object. B: atmospherical attenuation, this effect shows to have significant effectiveness on the laser power especially the humidity effectiveness on CO2 laser radiation. C: the reflectivity of some tactical objects that display considerable absorption to the laser radiation. D: the signal to noise ratio that facilitated concluding judgments concerning the differentiation between direct and indirect detection effectiveness. Moreover, computer guided optical radars for measuring object velocities with both CO2 and laser diode were set up on laboratory measure employing a Mercury Cadmium Tellurium (MCT) and Silicon detectors respectively. Different moving objects at different velocities were studied. Doppler shifts, modulation frequencies and laser wavelengths were conveyed to a PC, which was capable of displaying moving object velocities
ISSN
:
1555-130X
Journal Name
:
JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS
Volume
:
10
Issue Number
:
5
Publishing Year
:
1435 AH
2015 AD
Article Type
:
Article
Added Date
:
Saturday, August 19, 2017
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
Y Al-Hadeethi
Al-Hadeethi, Y
Investigator
Doctorate
Files
File Name
Type
Description
42680.pdf
pdf
Back To Researches Page