Does a GMRS antenna need a ground plane?
All Midland GMRS antennas require a ground plane for best performance.
Does my antenna need a ground plane?
The antenna system requires a “ground plane” for the radio wave to form. With dipoles, one half of the antenna is your ground. In verticals, something below must provide ground to complete the RF wave.
What is no ground plane antenna?
A no ground plane CB Antenna is a CB antenna that doesn’t require a ground plane (large metal surface under it) to operate. Ground Plane antennas are specially designed to work on fiberglass vehicles and boats. A No Ground Plane antenna installed on a vehicle or boat constructed of metal will not operate correctly.
Do you need to tune a GMRS antenna?
If you’ve installed a GMRS radio in your overland vehicle, you’ll probably need to tune your antenna or “set the SWR” before using it, for best results. Because if you don’t, any mismatch that occurs from having the wrong length of antenna could reduce performance, or even worse, damage your radio.
What do I do with extra GMRS antenna cable?
Your best option for handling excess coax is to serpentine the cable into a 12 to 18 inch yarn-like skein. Secure the skein in the center with a wire tie and tuck it away. This guy talks about eliminating comman mode current by using a choke (coiled up section of coax) at the antenna. scroll down a little.
How long should a GMRS antenna be?
The J-Pole antenna is a half wave radiator with a quarter wave matching section. The overall length of the GMRS J-Pole is 30 inches, so if you take the length of the 1/2 wave radiator, plus the length of the 1/4 wave matching section, and the length of the mounting section below, it all adds up to to about 30 inches.
Why do antennas need ground planes?
In the case of a 1/4-wave antenna, the ground plane acts as the counterpoise to form, in essence, a centered 1/2-wave dipole. Since this plane is the other half of the antenna, its size and proximity are essential. Often an antenna can appear smaller than its specified wavelength.
Does a 1/4 wave antenna need a ground plane?
Does a 1/4 wave antenna need a ground plane? Answer: Yes. All 1/4 wave antennas work best if they are installed in the center of a metal ground plane with at least 1/4 wave length radius (1/2 wave length diameter: ~6 inches for 900Mhz and ~3 inches for 2.4Ghz); larger is better.
Can a CB antenna be used for GMRS radio?
Both CB and GMRS use RG-58 50 ohm coax, and you can get an NMO mount CB antenna… so that part does work… but that would be the only part of his idea that would be doable. Even though they both share the same kind of Coax.
How high can a GMRS antenna be?
20 feet
(b) The antenna for a small base sta- tion or for a small control station must not be more than 6.1 meters (20 feet) above the ground or above the building or tree on which it is mounted.
What kind of antenna do I need for GMRS?
These antennas ideally utilize a metallic “ground-plane” of at least 1×1 feet (like the roof of a truck) but in the off-road world that usually is not possible. Most GMRS antennas get mounted on fenders, bumpers or spare tire hitches. So, how can overcome this? Easy, you can use an NGP or No Ground Plane required antenna.
What kind of antenna to use for ground plane?
Your best bet would be to use those brackets with the longer Comtelco whip antenna. I would use an NMO lip mount to get the antenna closer to the hood and use a Larsen or the Comtelco antenna.
Do you need a ground plane antenna for NGP?
Generally a 5/8 wave antenna needs a ground plane while a 1/2 wave does not. What’s the frequency, Kenneth?!?!?! @mmckenna, So I need a NGP antenna to use my brackets?
What’s the best way to mount an antenna?
One mounting option for your antenna is to drill a hole in your bumper/fender and use a thru hole mount. A good choice for this would be a mount from our RNMOV part series (pictured below). You would need to drill a 3/8″ hole for this mount.