What is a random wire antenna?
The random wire antenna consists of a simple piece of wire non -specific length. Many people consider it a type of monopol antenna; However, it is not in line with any specific frequency, which is one of the defining aspects of the monopoly antenna. Random wire antennas usually find use in places or situations where it is not possible, practical or cost -effective to create the right antenna. This is how the antenna receives a radio signal. Similarly, when the antenna is transmitted, sending the electrical signal into it causes it to resonate, creating an electromagnetic field directly proportional to the frequency of the electrical signal. The physical length of the antenna determines what frequency will resonate.
The antenna tuning act is to adjust the physical length of the antenna to resonate to the frequency particlear, which allows it to effectively send or receive the signal at this frequency. Random wire antennas are no specific length; Therefore, they are not in line with any specific frequency. As a result, they tend to work badlyAnd only a small amount of energy available when receiving or transmitting a signal is transferred.
All antennas show features known as impedance. In the antennas of the monopoly and a random wire, the amount of electrical resistance measured between the end of the antenna connected to the radio and the ground is an impedance. In the monopoly antenna, the impedance is constant at a specific level as the function of its width and matter. As a result, the monopol antenna impedance is ideally coincided with the radio circuit. This allows the radio to receive and transmit the signal as effectively as possible through the antenna.
as a random wire antenna is random by nature, there is no predetermined amount of impedance that corresponds to the radio. In addition, because the antenna does not have a length in line with any particular frequency, the antenna impedance varies depending on the frequency of the signal. This mismatch and change of impedance causes an antenna to work poorly with the radio, which furtherE deteriorates its ability to receive a signal at any given frequency.
Despite its shortcomings, a random wire antenna can be a very useful device. For example, in an emergency, it is possible to build quickly and easily from a literally available wire, or if the available staff lacks a skill to create a properly tuned antenna. In any situation, the random antenna will always work better than no antenna.