This section provides an overview for uhf receivers as well as their applications and principles. Also, please take a look at the list of 5 uhf receiver manufacturers and their company rankings.
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A UHF receiver is a receiver that can receive radio waves in the UHF (Ultra High Frequency) band, which uses frequencies in the 300 MHz to 3 GHz range. The UHF band is also used for commercial radio broadcasting. In addition, UHF is also used for commercial radios and cellular phones.
In general, few receivers can receive only UHF signals, and most receivers are capable of receiving a wider bandwidth of signals.
The main use of UHF receivers is to listen to the content of radios that use the UHF band. This is due to the fact that the UHF band is used by many commercial radios, and it is possible to obtain information on these radios. Regional development radios and cab radios are also included in the UHF band. However, as commercial radios have recently become digitalized, it is impossible to receive such information with a receiver that is not digital-compatible. Even if they are digitally compatible, they cannot be heard unless they are compatible with the digital system of the radio to be received, since there are a wide variety of digitalization methods.
The basic principle of UHF receivers are the same as that of a radio listening to AM, FM, etc., consisting of an antenna, tuning circuit, detection circuit, and output circuit.
As for the antenna, UHF has a short wavelength, so the antenna length can be shortened. This is convenient for in-vehicle use, such as cab radio, and also has many advantages for installation in mobile terminals, which is why UHF radio waves are used for cell phones.
On the other hand, UHF is a lower frequency than so-called shortwave, so it passes through the ionosphere above the earth without being reflected. For this reason, UHF radio waves can only be transmitted as far as the eye can see (the distance that radio waves travel in a straight line), even if they are somewhat in the shadow of mountains, buildings, and other obstacles.
Digital terrestrial broadcasting uses the UHF band, and the fact that it is broadcast from the very high Delevy radio tower explains the reason for this. This is also the reason why cell phone base stations that use UHF band signals are installed at a reasonable height, even in residential areas.
*Including some distributors, etc.
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