Universiti Teknologi Malaysia Institutional Repository

High frequency band communication application in Malaysia

Idrus, Sevia Mahdaliza and Abdul Razak, Mohammad Hafizul (2008) High frequency band communication application in Malaysia. In: Wireless Communication Technology in Malaysia. Penerbit UTM , Johor, pp. 8-14. ISBN 978-983-52-0656-6

[img] PDF (Fulltext)


High frequency (HF) radio frequencies are between 3 and 30 MHz.[1] Also known as the decameter band or decameter wave as the wavelengths range from one to ten decameters. Shortwave (2.310 - 25.820 MHz)[1] overlaps and is slightly lower than HF. Since the ionosphere often reflects HF radio waves quite well (a phenomenon known as skywave), this range is extensively used for medium and long range terrestrial radio communication. However, suitability of this portion of the spectrum for such communication varies greatly with a complex combination of factors[1]: • Sunlight/darkness at site of transmission and reception • Transmitter/receiver proximity to terminator • Season • Sunspot cycle • Solar activity • Polar aurora • Maximum usable frequency • Lowest usable high frequency • Frequency of operation within the HF range

Item Type:Book Section
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:20116
Deposited By: Zalinda Shuratman
Deposited On:29 Dec 2011 01:06
Last Modified:09 Oct 2017 01:15

Repository Staff Only: item control page