Antennas

As 27 MHz is a relatively long wavelength for mobile communications, the choice of antenna has a considerable impact on the performance of a CB radio.

One common mobile antenna is a quarter-wave vertical whip. This is roughly nine feet (2.7 metres) tall and mounted low on the vehicle body, and often has a spring and ball mount. A common misconception is that the '102 inch' whip is the correct length for US CB frequencies; in reality, it is designed to be paired with a six-inch spring, both to bring it to the proper electrical length, and to enhance its resilience to scraping and striking overhead objects.

Where a nine-foot whip would be impractical, shorter antennas include loading coils to make the antenna electrically longer than it actually is. The loading coil may be on the bottom, middle, or top of the antenna, while some antennas are wound in a continuously loaded helix.

Many truckers use two co-phased antennas mounted on their mirrors.

Another mobile antenna is the continuously-loaded half-wave antenna. These do not necessarily require a ground plane to present a near 50 Ohm load to the radio, and are often used on fiberglass vehicles such as snowmobiles or boats. They are also ideal for base station usage where the circumstances preclude the use of an antenna that requires a ground plane to function properly.

Handheld CBs often use either a telescoping center-loaded whip, or a continuously-loaded “rubber ducky” antenna.

Base CB antennas may be vertical for omnidirectional coverage, or directional "beam" antennas may be used to direct communications to a particular region. "Ground Plane" kits exist as a mounting base for typical mobile whips, and have several wire terminals or hardwired ground radials attached. These kits are designed to have a mobile whip screwed on top (again, the full-length steel whip is a preferred candidate) and mounted on top of a mast. The ground radials take the place of the vehicle body, which is used as a counterpoise for the mobile whip in a typical vehicle installation.

CB Radios Antennas available.

910-2501B CB RADIO BLACK TERMINATOR  DUAL COIL ANTENNA
910-2501B CB RADIO BLACK TERMINATOR DUAL COIL ANTENNA
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Cobra HHRT (includes HH 38 WX ST & Antenna) hand held CB radio
Cobra HHRT (includes HH 38 WX ST & Antenna) hand held CB radio
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Antenna Ground Strap Copper Tinned for Cb CW Ham Radio
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LATEST XTUNE REAL CARBON FIBER/BLACK CAR RADIO 3" ANTENNA UPGRADE CB2
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CB Ham Radio UHF PL 259 Antenna Coax Connectors PL-259
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Ham Radio and CB Antenna Dimension Charts - CDROM
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HAM RADIO CB / SWL ANTENNA LAUNCHER -- CROSSBOW
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dukes of hazard general lee radio shack archer 21-908a teardrop cb antenna nos
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COBRA HG A1500 MAGNET MOUNT 2 WAY CB RADIO TRANSCEIVER PORTABLE ANTENNA 31 INCH
COBRA HG A1500 MAGNET MOUNT 2 WAY CB RADIO TRANSCEIVER PORTABLE ANTENNA 31 INCH
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Wilson CB radio antenna  (PRICE REDUCED FOR QUICK SALE)Last auction for this !!!
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M-400 STARDUSTER CB/HAM RADIO BASE ANTENNA
M-400 STARDUSTER CB/HAM RADIO BASE ANTENNA
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MIDLAND® 40CH CB RADIO AND MIDLAND® GLASS MOUNT CB ANTENNA
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AVANTI ANTENNA SWITCH BOX radio ham cb
AVANTI ANTENNA SWITCH BOX radio ham cb
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