The Electromagnetic Spectrum: Understanding the Fundamentals
Introduction Electronic warfare (EW) involves the strategic use of the electromagnetic (EM) spectrum to gain…
Where Does 468 Come From – half wave dipole
We’ve all seen this number over and over again – the “magic number” that gives…
What is carrier frequency?
A carrier frequency is a single radio frequency with steady amplitude. Alone, it would sound…
One Stop Reference For Shortwave Listeners
I would like to share about this website that i used a lot when doing…
Hiding In WARC Bands
From Wikipedia, The WARC bands are three portions of the shortwave radio spectrum used by…
Pilot Dengar Dangdut Ketika Terbang
VIVAnews - Penggunaan frekuensi di Indonesia masih belum tertata dengan baik. Hal itu bisa dilihat…
Physically Small Spiral Antenna
http://www.google.com/patents/US7586462?printsec=abstract&dq=physically+small+spiral+antenna&ei=J1_QT4n2M9DOrQehlLiJDA#v=onepage&q=physically%20small%20spiral%20antenna&f=false
MAYDAY MAYDAY
please watch this video first. A proword is short for procedure word, or phrase. MAYDAY…
We Need More CW Opr
Yes, we need more CW operator on HF bands. Lately, i am so excited working…
The Basics of VHF and UHF Signal Propagation
The Electromagnetic Spectrum - The electromagnetic spectrum is a continuum of all electromagnetic waves arranged…
Satellite Bands
Following are the frequency ranges used in satellite communications. L-band (390 MHz-1.55 GHz) GPS satellites,…
Optical Bands
The spectrum for transmission in singlemode optical fibers has been broken into the following wavelength…
Wavelength
The distance between crests of a wave. The wavelength determines the nature of the various…
IEEE 802.22 Akan Menggunakan frekuensi TV VHF dan UHF
The IEEE has recently released the new 802.22 standard for Wireless Regional Area Network (WRAN)…
BBC Frequency Charts For South East Asia
Frequency Charts 27th March to 29th October 2011. All times GMT Please go to http://www.bbc.co.uk/worldservice/schedules/frequencies/aspac.htm…
Voice Of America Broadcast Frequency
VOA Broadcast Frequency Schedules Effective 0800 UTC, 27 March 2011 through 0800 UTC, 30 October…
Transmission Line Calculator For iPhone / iPad
Transmission Line Calc allows you to perform several calculations related to RF transmission Lines.After selecting…
Field Strength Calculator For iPhone/iPad
Field Strength Calc helps you determine the received strength of a transmitted signal.Enter in the…
ARISS – Amateur Radio on the International Space Station
The ARISS program is a cooperative venture of NASA, the ARRL and AMSAT and other…
Amateur Radio Satellite
AMSAT is a name for amateur radio satellite organizations worldwide, but in particular the Radio…
IARU Region 3 Band Plan
http://www.iaru-r3.org/ A bandplan or band plan is a plan for using a particular band of…
Doppler effect
The sudden change in pitch of a car horn as a car passes by (source…
Extending ICOM IC-E91 HT Frequency Range
Description: Type: Amateur VHF/UHF transceiver Frequency range: TX: 144-146 / 430-440…
Slim Jim & J-Pole Antenna Calculator By M0UKD
The Slim Jim is a vertically polarized omnidirectional end-fed antenna having considerable "gain" and this…