how to ground a cb antenna

How to Ground a CB Antenna – Step-by-Step Guide, Tips, FAQs & More

This site contains affiliate links to products. We may receive a commission for purchases made through these links.

When we first experimented with CB antennas, we ran into a ton of issues because they don’t operate the same way as traditional antennas. 

CB antennas radiate signals downwards. That’s why you need to ground it properly because otherwise, the signals won’t be properly transmitted. 

This post provides detailed instructions on how to ground a CB antenna to ensure it properly transmits signals. 

Quick Summary

In this post, we will discuss 

  • Safety precautions and things to note before you ground a CB antenna
  • Items needed to properly ground a CB antenna 
  • How to ground a CB antenna 
  • Some frequently asked questions (FAQs) 

So without further ado, let’s get started.

Safety Precautions and Things to Note Before You Ground a CB Antenna

Before we actually get into the process of grounding your CB antenna, there are some important things to note. 

coaxial cable ground plane good ground negative power lead cb radio probe lay ground wire

Firstly, you should check whether or not your antenna can be connected to a coaxial plug. If it can, then all you need to do is mount it to the frame of your car (or truck) and connect it with a coaxial cable to your radio. 

If that’s not the case, then you’ll need to ground your CB antenna in some way. Most people prefer to use a 10-gauge wire. We recommend that you use braided ground straps as they are fairly convenient to work with. 

Secondly, it’s important to consider where you’ll mount your CB antenna. The most ideal places to mount a CB antenna are 

The Trunk Lid

The most preferable spot to mount your CB antenna is the trunk lid of your car or truck. It’s a good idea to screw it right beneath the lip. 

You might be concerned about the hinges not being a proper ground. However, this issue can easily be resolved with the help of grounding straps. 

Ensure that you cut out just enough grounding straps to ensure that the lid can open up with ease.

The Front Panel or Bumper 

Similar to this, you can also choose to have your antenna set up on the front side panels or the front bumper. 

The easiest way to ground such a CB antenna setup would be to connect it with a coax cable and mount it to a metal surface. 

Please ensure that you don’t mount it to any other material such as plastic or wood. 

What You’ll Need to Ground a CB Antenna 

Before you ground a CB antenna mount, make sure that you have all the items needed. It’s a good idea to have all of the items at hand as this will help get the process done quicker. Otherwise, you’ll be running around your shed looking for specific tools one by one. 

ground plane ground strap antenna base other vehicles multi meter ground same reason hot side
  • A multimeter. It can be either analog or digital.
  • Grounding straps. Make sure to have a minimum of 20.
  • A paint scraper
  • A screwdriver set
  • A marker
  • A wrench

Once you’ve gathered all of the essential tools, you can get started with the grounding process. 

Find out all the information, tips, guides and more about CB Radios in our website.

How to Ground a CB Antenna? (Step-by-Step Guide) 

If you’d like to properly ground a CB antenna, follow these steps: 

Step 1: Determine where exactly you want to mount the antenna on your trunk lid or front panel. 

Once the spot is decided, mark it with your marker. This will be the spot where the set screw for the CB antenna mount will be installed. 

ground plane multi meter point metal parts other materials original installation plus sign

The underside of the trunk or the front panel will often be painted. Use your paint scraper to scrape off some of the paint on the marked spot. You’ll be able to see the metal below. 

Step 2: Take note of all the separate sections of your trunk or front panel. Use the grounding straps to bond all of these sections together. 

Please note that some car manufacturers provide a grounding spot for antennas. If your car has a specific grounding spot, then this step is unnecessary. You can simply use the grounding spot to install your CB antenna mount. 

This step can also be skipped for cars that are unibody. This is because with such vehicles, there are no separate sections and everything is welded together as one single unit. 

Step 3: Before you use your multimeter, test to see if it’s working properly. 

You can easily test a multimeter by touching its two probes together. Once they make contact, you should see the needle turn to the right to indicate a reading. If this happens, then that means your multimeter is working properly. 

If it’s a digital multimeter, then a reading will pop up on the digital display when you touch the two probes together. 

Step 4: Lay down the first probe at the spot where you would want to install your CB antenna mount. Please note that the first probe should make contact with the metal surface where you scraped off the paint and nothing else. 

The second probe needs to be connected to the negative terminal of your vehicle’s battery. Please work with caution at this step and take things slow. The second probe should not touch the positive terminal of the battery in any case. 

Step 5: Check to see if you have properly set up the CB antenna ground by testing it with your multimeter

The needle should swing all the way to the right when you test it with the multimeter. That’s the sign of a good ground. 

If the needle does not swing or if it only swings by a negligible amount, then that means you need to improve your grounding. 

multi meter vehicle mounted point cable metal point shield point

Check to see if everything is properly connected. If you still don’t get results, then you may need to change the position of the antenna mount. 

Once you’ve grounded it properly, you now have a perfectly usable and solid grounding plane for your CB antenna

Step 6: After you’ve set up the ground, simply follow the instructions provided for your particular CB antenna to mount it. 

Naturally, these steps may differ slightly from antenna to antenna. However, once the grounding is done, the rest of the process is fairly self-explanatory. 

Tuning a CB antenna without an SWR meter seems more challenging than it sounds. We have created step-by-step instructions on how to tune a CB antenna without an SWR meter.

Frequently Asked Questions (FAQs) 

 vehicle cable metal point frame battery vehicle mounted other end mounting attach signal

What is a CB antenna used for? 

A CB antenna stands for citizen band antenna. It’s used for two things: 

  1. Capture radio signals which are then converted to electrical signals by a receiver. 
  2. Receive electrical signals from a transmitter and convert them into radio signals.

What happens if I don’t ground my CB antenna? 

If you don’t properly ground your CB antenna, then you can run into a variety of issues. 

You won’t be able to tune it at all and your SWR levels will be extremely high as well. 

Does the length of my CB antenna matter? 

Yes. A taller or longer CB antenna is much more effective at capturing signals and will often have a much higher range. 

The ideal length is ¼ of the wavelength of the signal being captured. In the case of radio frequencies, that would be 102 inches (8.5 feet). 

Can I use 2 CB antennas together?

Yes, you most definitely can. In fact, most people prefer to have a dual CB antenna set up on either side of their vehicles. 

Find out how to increase watts on a CB radio in our complete guide.


So that’s how you properly ground a CB antenna. 

Make sure that you have the appropriate CB mount for it and the proper tools to install and you should be good to go. 

Let us know how your installation went in the comments section below. If you have any further questions as well, please feel free to reach out. 

Check out all the information and in-depth guide about radios on our website.

Leave a Comment

Your email address will not be published. Required fields are marked *