alexa Abstract | Signal Generation and Timing Control of HF Radar
ISSN ONLINE(2278-8875) PRINT (2320-3765)

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
Open Access

OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations

700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

Research Article Open Access


The radars are crucial component in assessing the behavior of electro jets and wind current. The working principal of HF radar is based on Doppler shift induced on the incident signal by the electro jets at higher altitudes of atmosphere. The Doppler shift induced on the echoes received from different altitudes indicates the characteristics of the electro jet. The exciter generates low level RF signals of frequency 18MHz. These signals pulse modulated, using timing pulses of selectable width and Pulse Repetition Frequency (PRF) is generated by the radar timing controller and amplified to a peak power of 50Kw by transmitter unit. Phase array antenna consists of 72 wire dipoles arranged in 12X6 rectangular configurations and is designed to operate harmonically at 18MHz. The same antenna array functions as transmitter and receiver and a T/R switch enables use of same phased array antenna for transmission and reception. The timing control unit controls the whole synchronization of the high frequency radar receiver. In order to get synchronization, timing unit has to adjust the timing of transmission and reception. Transmission and reception takes place based on some scientifically proved specification values. User writes these specification values to the system in real time. So there need some system to enter these values. For this RS232, a serial communication protocol is used. Timers take these specification values and thus solve the timing issues related to the High Frequency Radar receiver.

To read the full article Peer-reviewed Article PDF image

Author(s): Remya M Nair


Doppler shift, Radar, HF Radar Receiver, Timing control., Adaptive Signal Processing,Asynchronous Machines,Artificial Intelligence in Electronics,Satellite Communication,Diagnosis and Sensing Systems.

Share This Page

Additional Info

Loading Please wait..
Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version