Antenna Coaxial Cable Length

All too often the coax is ignored and performance suffers because of the lack of attention it receives.

Antenna coaxial cable length.

When it comes to signal loss over longer cable lengths the basic rule of thumb is that a 50 foot cable can experience noticeable signal loss and a 100 foot cable can drop as much as one third of. The type of coaxial cable you ultimately choose will have a significant impact on the amount of signal loss you can expect for a given length of cable. The longer the length of a piece of coaxial cable the more signal is lost. 30 feet white rg6 coaxial cable coax cable made in the usa with connectors f81 rf digital coax av cabletv antenna and satellite cl2 rated 30 foot 4 7 out of 5 stars 3 777 12 47 12.

Coaxial cable comes in varying lengths. The length of coax to used to repeat the swr of a non resonant antenna other than 50 ohm match to your system at the other end would be 1 2 wave multiple length coax. It is important to choose the right cable length and thickness. The coaxial cable running from your radio to the antenna is very important.

Other features of coaxial cables coaxial cable length. The shorter and thicker the cable is rated will determine the strength of the signal transmitted. A coaxial cable or coax cable for short is a heavy duty shielded type of cable used for multiple purposes in both commercial and residential applications. In radio systems cable length is comparable to the wavelength of the signals transmitted.

Coaxial cable loss is normally specified in db loss per 100 feet of cable. It is best to use coax in multiples of 25 50 or 1 wave length of the center frequency of the antenna you are connecting to. The higher the frequency of the signal passing through the coaxial cable the higher the loss over a given length. For vhf 2m the center frequency is about 146mhz.

This is derived for the 2m vhf of amateur allocation 144 mhz 148 mhz. Using the league table you can see that the db loss for 100m of lmr 600 coax at 50 150mhz is 1 8db. To determine the proper length of coax. Learn how to calculate 1 2 wave multiples for use in special setups.

Here you can see that the total length of cable being used is 19 5m which is 7 half wavelengths taken from the multiple 1 2 wavelengthstable with a single 1 4 wavelength added as shown in the coaxial length calculator. Cb coax cable is necessary to connect your antenna to your radio.