A magnetic antenna is a kind of antenna that generally utilizes short metal rods to receive and transmit signals. The metal rods commonly used are copper or aluminum rods. It can be an ultra high frequency (UHF) antenna, a radio antenna, a wireless local area network (WLAN) antenna, or a TV antenna. As long as it uses magnetic fields on a metal rod to receive or transmit the signals, it is referred to as a magnetic antenna. To generate a magnetic field, an electric current is often needed, thus, most magnetic antennas need electricity to effectively receive or transmit signals.
Magnetic antennas are usually small and compact, making them ideal for mobile use. Amateur radio, commercial radio, and military radio operators use magnetic antennas for this reason. These were even commonly used in the Vietnam War because of their transportability. When it comes to portability and short range transmission of signals, the magnetic antenna frequently does the job well.
One of the most commonly used types of magnetic antennas is the magnetic loop antenna, also called the small transmitting loop. One advantage of using magnetic loop antennas is their ability to reject noise that comes from other signal transmitting devices. This is usually due to their ability to work in a narrow frequency range. Many users prefer this type of antenna because it is very easy to transport.
Compared to dipole antennas, magnetic antennas may not perform better. When compared to mobile antennas and other kinds of portable antennas, however, they are usually better performers. Factors in the performance of a magnetic antenna include distance from the ground and construction. Most magnetic antennas can be made from scratch, giving users the advantage of saving money. Magnetic antennas bought from manufacturers can also be modified to achieve certain specifications of users with special needs and requirements.
A magnetic antenna, especially if it is a magnetic loop antenna, can be a little expensive. This is why creative individuals with the right technical skills often choose to create their own magnetic antennas using everyday objects that they can find in their homes. They may also buy their materials form regular hardware stores. There are several well-documented magnetic antenna projects online that gives easy to follow steps in creating a homemade magnetic antenna. People generally build magnetic antennas to access a unique frequency in the most efficient and cost effective way possible.