How to Build a VHF Antenna?

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A UHF-VHF antenna is a type of antenna that connects from the outside or the inside of your home and links to your smart TV by virtue of a digital converter box. This type of antenna allows your TV to pick up and watch your favorite TV programs from various over-the-air TV channels.

We highly recommend that you mount them outdoors for optimal signal reception, but that does not mean to say you can’t install them indoors. Only that you should mount them on the ceiling. It is such a relief to know that you can build your own.

Defining What a VHF Antenna Is All About

public safety multiband VHFBoth the UHF and VHF types of antennas are utilizing very high frequency (VHF) and ultra-high frequency (UHF) signals that are used by 2-way radios. They also found practical applications in commercial communications and even in public safety.

The radio signal for VHF will be ranging from 30 up to 300 MHz whereas the UHF range would be anything between 300 MHz to 3 GHz. When VHF and UHF antennas are polarized, they can be set aside for non-line-of-sight (NLOS) applications.

There is a good possibility that paths here could be distracted by several things such as multi-path, phasing, obstructions, reflectivity, and absorption. These antennas are qualified as multi-polarized, known to help in reducing signal degradation and offer users consistency in data and voice communications.

What’s the Difference?

VHF signals are under 216 MHz, and for that matter, it comes naturally for them to require much longer antenna elements. Each of these elements must remain in ‘tune” to the right frequency. And this explains the reason why it is kind of normal for huge antennas to come with so many elements, to help them receive optimal signal reception for every channel.

UHF frequencies have been found to respond much better if you are utilizing a “bowtie” type of antenna or a single loop design. It makes it possible for small types of antennas to work seamlessly well for all UHF frequencies.

How to Figure Out the Type of Antenna You Need?

At some point in time, this was pretty easy to do. Say that the TV station was on channel 2-11, which makes it on VHF. Anything that goes above that would fall under UHF. But things would be taking a 360-degree turn with the coming of the PSIP system. This system of broadcasting is currently used today and we need to make it clear that the frequency and the channel number are not in any way correlated.

If you are diligent enough, you can make use of several websites serving as a TV channel directory. Take caution, though, that there is so much drudgery on this kind of task and may take a considerable amount of time.

If you need VHF antennas, and the TV station you are aiming to have on your TV set is more or less 30 miles away from your home, it would necessitate the use of an old yagi type of antenna just to make it work for your satisfaction.

Step 1

Grab your coaxial cable and remove 22 inches of its outer insulation, including the wire shield from one of the sides of the coaxial inner cable. Take caution not to slice through the coaxial cable, otherwise, you will need to start over one more time. The goal you have here is to expose 22 inches of the cable, and about an inch should be allotted for soldering 3 radials to it.

Step 2

With the help of a soldering gun, solder your radial cable to the coaxial cable shield. This is usually very near the end where it was cut at. Remember to leave enough slack for the cable so you can solder it to the shield. As for the other 2 coaxial cables, you need to solder them to the single radial cable.

Step 3

Have the cables spread out in say 3 equal directions? Distance every single cable to 120 degrees from each other.

Step 4

Make sure to hang your antenna from your support. As for the opposite end, you can attach it instead to the scanner.