1. Frequency range

The working frequency range when the amplifier meets or is better than the index parameters. The frequency range of EMC system covers 9KHz ~ 40GHz. Because of the limited bandwidth of chips and antennas, power amplifiers are usually designed in different frequency bands.

2. Output power

The output power of the amplifier can be expressed in two ways: saturation power and 1dB compression point output power. The former refers to the maximum output power, while the latter refers to the output power when the gain drops by 1dB. The former is generally larger than the latter. For the pulse amplifier, there are peak power and average power, the former represents the maximum output power when there is signal, and the latter is the power after averaging according to time, the relationship between them is related to the duty cycle of the signal. When the output power increases close to the maximum value, the output power will be saturated and the maximum value will not change. Generally, the output power when the gain drops to 1dB lower than the linear gain is defined as 1dB compression point of the output power. At this time, the power value is 1dB compression point power.

3. Gain and adjustment range

The ratio of the input and output power of the power amplifier (the attenuator with adjustable internal gain is zero) is the gain. The gain adjustment range generally refers to the range of DB value that can be set for the user.

4. Gain flatness

Indicates the power gain fluctuation of the amplifier in the working frequency band.

5. Minimum input signal / maximum input signal level

Refers to the minimum or maximum input signal level of the power amplifier at the maximum output power. It is also defined that the input level is 0dbm, and the maximum input or undamaged level is + 15dBm

6. Third order intermodulation point

I / O third order intercept points IIP3, OIP3