What is the VHF antenna?
Antenna or antenna is a device made to transmit and receive signals for radio, TVs and other devices such as wireless phones and mobile phones. The antennas are made of conductors, metal bars and sometimes other materials. Radio waves, more precisely called radio frequencies (RF), are divided into a number of frequency ranges. VHF is one of the ranges of radio frequencies and the VHF antenna is specially designed for this frequency band.
radio frequency strips range from very low (VLF) to extremely high (EHF). High frequency (HF) - 3 to 30 MHz - for example used by short waves and some CB radios; Very high frequency (VHF) - 30 to 300 MHz - for example used by television broadcasts and radio FM; Ultrahigh frequency (UHF) - 300 to 3000 MHz - used by television broadcasts, mobile phones, GPS, Bluetooth®, microwave furnaces and GMRS radio (Rody MoBile radio service) and, for example, wireless ropes (local networks); And the super high frequency (SHF) - 3 to 30 GHz - used by radar, microwave and wireless ropes (networks of local areas), for example, four frequency strips that are most used in the 21st century. Since different types of devices work at the radio frequency range, the VHF may be designed to suit different needs and conditions to suit these different purposes. In addition, the VHF antenna can be either an independent antenna, produced only for the served VHF frequency, or it can be combined with antennas for other frequency ranges, most often UHF.
The relationship between TV antennas UHF and VHF may be unexpected in that many UHF antennas can pick up a certain VHF station, often channels 7-13, while many VHF antennas can pick up many UHF channels, often channels 14-69. These abilities depend on the distance and direction and uncertainty of the results the reason why these two antennas often afterThey use in combination. The fact that the VHF antenna can be used in different situations, due to the different use of the frequency range, means that the VHF antenna can appear in many shapes and be available in many sizes. In addition, the VHF antennas can be designed to place inside or out.
One of the form for the VHF antenna is the dipole antenna, sometimes referred to as ears rabbits or rabbit ears, intended for internal use. It is also found combined with a UHF loop. On the other hand, the Yagi antenna, which was created in Japan-so-called