What Is an UHF Receiver?
An UHF (Ultra High Frequency) Receiver is a device that receives ultra high frequency radio waves.
UHF Receivers catch this frequency band and convert it into a form that viewers and users can use to obtain information.
Note that the UHF band uses a higher frequency band than the VHF (Very High Frequency) band, resulting in faster communication speeds and greater data transfer capabilities. On the other hand, it is also susceptible to physical obstacles.
In general, few receivers receive only UHF signals, and most receivers are usually capable of receiving a wider bandwidth of signals.
Uses of UHF Receivers
UHF Receivers are widely used in professional audio equipment. Some of the major applications of UHF Receivers are listed below:
1. Wireless Microphones
UHF Receivers are used for wireless microphones. The receiver receives the signal transmitted from the microphone and converts it into an audio signal. There are many high-performance and compact UHF Receivers available, and they are used for various applications.
2. Professional Audio Equipment
UHF Receivers can be used to receive high-quality audio signals from professional speakers, amplifiers, and mixers.
3. Karaoke Equipment
UHF Receivers are used to receive wireless microphones, which are often used in karaoke. The UHF Receiver can handle multiple channels and provides clear sound through digital processing. It also uses a front antenna for highly efficient reception, making it easy to move and install.
4. Wideband Receiver
A wideband receiver is a receiver that covers many frequency bands. It can receive amateur radio, aviation radio, and various types of digital radio.
Principle of UHF Receivers
An UHF Receiver consists of the following four major parts:
1. Antenna
This is the part that receives radio waves in the UHF band. The shape and size of the antenna depends on the frequency you want to receive. Radio waves received from the antenna are converted into electrical signals.
2.Tuner
The tuner is the part that selects the desired frequency from the radio waves converted into electrical signals. The tuner uses elements such as variable capacitors and variable inductors to adjust the frequency.
The signal output from the tuner is converted to a fixed frequency called the intermediate frequency (IF).
3. Demodulator
The demodulator is the part that extracts information such as audio and video from the signal converted to the intermediate frequency. The demodulator demodulates the signal using different circuits depending on the modulation method.
The signal output from the demodulator is sent to speakers, displays, etc.
4. Control Circuit
This is the part that controls the operation of the UHF Receiver. The control circuit uses integrated circuits such as microcontrollers and microprocessors to perform operations such as channel selection and volume adjustment. The control circuit receives inputs from remote controls and buttons.
Types of UHF Receivers
UHF Receivers can be divided into the following types according to their various applications and performance.
1. Receivers for Wireless Microphones
These Receivers receive audio signals transmitted from wireless microphones for karaoke and live performances. Usually, the 800 MHz or 900 MHz band is used to transmit signals using FM (frequency modulation) or digital modulation methods.
They are required to have excellent reception sensitivity, distortion, and sound quality. Depending on the model, some UHF Wireless Receivers offer clear sound quality through digital processing and use a front antenna with high-efficiency reception, making them easy to move and install.
2. Handy Receiver
These small, portable receivers cover a wide frequency band and can switch between FM, WFM (wideband FM), AM (amplitude modulation), and other reception modes. It can receive radio broadcasts, air bands, and various types of commercial radio.
They should have excellent battery life, scanning speed, and memory functions. Some models cover 0.100 to 1309.995 MHz, and there are wideband handy receivers with various functions such as high-speed scanning of 100 channels/second and blank line canceller.
3. Receiver System
A receiver system works with multiple transmitters and antennas to receive high-quality audio and video. They are used in conference rooms, classrooms, theaters, etc. They are required to have excellent simultaneous channel count, frequency stability, and interference rejection capability.