The test of the microwave power transmitter starts with the transmitter antenna test. To ensure the stability of the RF output of the power amplifier, first, the signal generator is connected to the signal power amplifier and power amplifier, and then the signal is generated by the signal generator. The output signal of the amplifier is measured by the spectrum analyzer. The output signal of the spectrum analyzer is connected to the power amplifier. The stable RF input to the amplifier is obtained. The signal generator is connected to the power amplifier, and the output signal of the amplifier is measured by the spectrum analyzer.
The frequency spectrum analyzer may be divided into two categories: continuous spectrum analyzer and burst spectrum analyzer . The burst spectrum analyzer has a dynamic range of more than 96 dB and a frequency resolution of less than 1 Hz and can be used to effectively test the frequency stability of the signal generator and the frequency stability of the power amplifier [11, 12, 13].
Through the analysis of the power amplifier, the input signal and the output signal are compared, and the gain of the power amplifier is calculated. The measuring instrument used to test the power amplifier is a power meter. The power meter is used to measure the power in the output of the power amplifier to calculate the power of the input signal and to calculate the power of the output signal. This test is commonly used in the test of the power amplifier output stage [12, 13].
Microwave power transmission is a kind of wireless power transmission technology based on electromagnetic induction. The receiver, transmit antenna, and rectifier circuit are often combined into a rectifier antenna. The receiving antenna and rectifier circuit are often combined into a rectifier antenna. The rectifier diode is used to convert the electromagnetic wave (radiofrequency energy) into direct current energy (DC) to power the load. The rectifier circuit consists of the rectifier diode (and other components) and the circuit board. It is necessary to determine the power and the load at the same time, and this test can be performed by using the spectrum analyzer. The results can be measured by a DC power meter to calculate the input and output power.
It is the most important equipment in microwave wireless power transmission systems. The spectrum analyzer is the most important equipment in evaluating the performance of the microwave power transmitter [11, 12, 13].
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