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What is VHF Antenna?
13 Sep 2023
What is VHF Antenna?
A VHF antenna forms an important component in VHF installation. It helps to improve communication indoors and outdoors. Very High Frequency (VHF) antenna mainly offers a radiator for the power that the transmitter in the radio generates. It radiates the energy in the right direction.
VHF (very high frequency) antenna is normally used to receive and transmitting signals ranging from 30 MHz and 300 MHz and a wave length between 1 to 10 meters. It can be easily used for long-range broadcasting. In This blog we covered what is VHF antenna? different types of VHF designs and how to choose a VHF antenna.
Different Types of VHF Antenna
Some of the most common VHF antenna designs are:
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Multi-element Yagi Antennas
VHF Yagi antenna includes a reflector and director and a gain of about 20 Db. It can be used in areas where there is a weak communication mode. You can combine a Yagi antenna into various arrays. Dipoles in a multi-element VHF Antenna can act as a reflector as well as a director depending on the type of frequency band.
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Conical Array Antennas
A conical array antenna contains reflector elements that come straight out from the supporting beam of the antenna. In this antenna, the driven elements are bent forward to make a conical shape. Conical array antennas increase the dipole’s diameter and its bandwidth. They are capable of receiving high and low-band VHF signals.
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VHF Arrays
When a reflector is added to the basic dipole antenna, it is known as an array antenna. The reflector of an antenna is longer than the driven element whereas the director is shorter than the driven element. Moreover, an array antenna can have several elements and an array of folded dipole antennas.
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Log Periodic Antenna
Log periodic antennais a kind of high-gain antenna that works on a broad frequency band. They include many active dipoles held together in a logarithmic mathematical formula. VHF log periodic antenna has broadband characteristics similar to a dipole array.
How is a VHF Antenna Made?
The inner electrical part of VHF Antennas is made of materials such as brass, copper, and coaxial cable. The best VHF antenna is made from brass or copper and gives a stable performance. Brass and copper VHF antennas are durable and rust-resistant.
Factors to Determine While Choosing a VHF Antenna
You must consider multiple factors while selecting a VHF antenna such as:
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Gains and losses in Antenna
Antenna gain must match the antenna loss in DB that is caused by a coaxial cable.
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Construction of Antenna
VHF Dipole Antennais normally made of fiberglass or stainless steel. If you want a durable antenna, choose the antennas made of polyurethane.
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DB Rating
The third factor to determine is the DB rating. Antennas with a high DB rating concentrate energy perpendicular to the antenna shaft that has a shape like a disk.
Final words
This is all about a VHF antenna and its construction and factors to determine while choosing this antenna. It is available in various types such as VHF Marine Antenna, VHF Naval Shipboard Antenna, and so on. If you need any assistance to find the best VHF antenna, then our team of experts help you to get the right VHF antenna as per your business need and wants. To know more you can check out website.
13 Sep 2023
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