What is RF power amplifier?
The radio frequency power amplifier (RF) is a device that increases the voltage and current of the RF signal. Usually, the RF signal RF signal is a carrier with side zones or a clean carrier or fair side tapes in some cases. The RF power amplifier usually has an air -cooled final phase that uses refrigeration sinks with fins that increase in the number to get into contact more with air and cause greater heat transfer for more cooling effect. Sound amplifiers with high loyalty work from approximately 40 Hz to about 15,000 Hz. RF power amplifiers have specified operating frequencies and the selected operating frequency must lie in their frequency range. For the operating frequency of 150 Megahertz (MHz), the RF power amplifier with a range of 145 to 155 MHz will be suitable. The RF power amplifier with a frequency range of 165 to 175 MHz will not operate at an operating frequency of 150 MHz.
In radio electronics, the RF power amplifier is an electronic amplifier that can be built in the transmitter or can be a separate device connected by a coaxial cable to the output of the output transmitter with a lower power. The output RF power is then connected to the external antenna. For the operation of the receiver, the unit for the transmitter or transmitter-receiver internal or external transmission/reception switch (T/R) may have. The task of the T/R switch is to switch the antenna to the transmitter or to the receiver as needed.
RF circuit can use transistors or integrated circuits to create amplification. In the RF performance design, the aim is to have sufficient amplification to create the desired output power and allow a temporary and small mismatch between the transmitter and the antenna feeder and the antenna itself. The antennader fee and the antenna itself are usually 50 ohms. Ideally, the combination of antenna and feeder will be an impedance that is purely resistance at the operating frequency.
Most antennas canTo be tuned so that the transmitter is the most suitable impedance when combined with a feeder. This comparison of impedance is required for maximum energy transfer from the transmitter to the antenna. The antennas will have slightly different properties from the frequency range. An important test is to ensure that the reflected energy from the antenna to the feeder and back to the transmitter is low enough. If the impedance is too high, the RF energy will be sent to the antenna to the transmitter to create a high ratio of stagnant waves (SWR), which causes the transmit power to remain in the RF power amplifier and causes overheating and even damage to active components.