Why Do Some Trucks Have Extra-Long Antennas On The Roof?

As if trucks weren't useful enough, some truck owners add even more capability by installing a communications system. UHF, two-way, and CB radios are helpful in trucks because they provide a reliable communication tool that doesn't require cellphone service. The installation of mobile transceiver systems, which need external reception devices, is why some trucks have extra-long antennas on the roof. The longer the antenna, the better the signal it can receive. 

The very long antenna used on some trucks is called a whip antenna, and these are commonly used for CB radios or other long-range communication systems. Whip antennas enhance radio reception, particularly in locations with weak signals or obstructions. A type of monopole antenna, a whip antenna radiates signals in all directions and is used for non-directional radio communication, where the direction to the transmitter or receiver changes or moves frequently. This makes them better than that little shark fin on the top of your car, and ideal for walkie-talkies and two-way radios, but they also have limitations — they don't work well for higher frequencies.

Another use of whip antennas is in conjunction with cellphone signal boosters in places with poor cellular coverage (they work better than cellphone signal booster apps). Essentially acting as an external receiver, a whip antenna can pick up and route the signal to the cell phone booster, which improves reception, reduces dropped calls and missed messages, and enhances data speeds for navigation and entertainment apps.

There are many different types of whip antennas, and depending on the specifications, prices can range from very low to expensive. Options start with just the antenna for only $8, with prices going up to $167 for a full package kit. You can intall a whip antenna by attaching it to the roof rail, using a powerful magnet attachment on the truck roof, or via a bull bar mount. 

Vehicles with whip antennas benefit from having a more powerful, reliable communications system. This is important while on the road, when traveling long distances, or where cell service is spotty. Whip antennas enable drivers to keep in touch and exchange information regarding traffic, weather, and request or provide help during emergencies, making each journey safer and giving the driver peace of mind.