The wavelength of a signal should always be 1/4 the length of the antenna you're using, as this gives you the very best efficiency. While you don't have to pick an antenna whose length is exactly 4 times the wavelength of the signal, it's a good idea to get as close as you possible can.Apr 29, 2020
Why is the length of a VHF radio antenna important?
The height of a VHF radio antenna is important because VHF is considered a “line-of-sightline-of-sightThe radio horizon is the locus of points at which direct rays from an antenna are tangential to the surface of the Earth. If the Earth were a perfect sphere without an atmosphere, the radio horizon would be a circle.https://en.wikipedia.org › wiki › Line-of-sight_propagationLine-of-sight propagation - Wikipedia” communication technology. Essentially, you can only communicate between two antennas that are within sight of one another. The higher each antenna is, the further you can communicate.
Can you shorten a VHF antenna?
Can I cut the cable on my VHF antenna? Yes, if you need to. However, you should leave at least three feet of coax, measured from where the cable exits the antenna. ... CB antennas' coax generally should NOT be cut.
How do I increase my VHF range?
Increasing the antenna height can also increase distance, so mount your antenna as high as possible, such as on top of your boat's hardtop or radar arch. You can also get greater range with a longer antenna — it has a larger radiating element. Additionally, keep in mind that not all VHF radios are created equally.May 24, 2016
What kind of antenna is used for VHF communication?
The VHF antenna P/N 2448-88-00 is an airborne communication antenna capable of transmitting and receiving signals in the VHF band from 118 to 156 MHz (extended) including VDL mode 2. Designed for high-performance and wide-body aircraft, the VHF antenna has a compact design for reduced drag.
Which antennas are used at VHF and UHF to provide communication?
- Two-Way Radio Antennas. Two-way radio antennas for VHF and UHF communications are used with vehicles such a police cars, fire trucks, ambulances, and mining equipment. ...
- HAM Radio and Scanner Antennas. ...
- DAS and BDA Antennas. ...
- Base Station and Mobile Antennas. ...
- VHF Antennas and UHF Antennas.
Can I use a UHF antenna on a VHF radio?
UHF may work quite good at VHF, if your UHF frequency is a multiple of your antenna VHF frequency, for example your 1/4 wave length 145 MHz vertical antenna will have a length of 3/4 of wave length at 435 MHz. That's how multiband antennas approximately work.
How far can a VHF reach?
A typical VHF station operates at about 100,000 watts and has a coverage radius range of about 60 miles.Aug 13, 2020
What affects VHF range?
A. Your antenna is the single most important factor affecting VHF radio range, and three key parameters determine antenna performance: gain, height and length. The higher the gain (decibel rating), the greater the strength and distance of the radio signal.May 24, 2016
How long does a VHF antenna last?
These antennas use stainless steel ferrules, combined with brass and copper elements, to provide maximum efficiency and range. They typically last for five to ten years. Antenna height, more than anything else, determines the distance you will be able to transmit radio signals.
When should I replace my VHF antenna?
One expert advised us that regular boat maintenance means check and replace your VHF cable every three years. By spending only a few dollars more you get a far better antenna. By spending only 25 to 30% more than the cheapest antennas [which are as little as $50 anyway] you get a dramatically better product.Feb 3, 2010