Project and Realization of Power RF amplifiers

800W low pass filter are available for 88.108MHz, 50, 70 and 144MHz. The filters have directional bridge with the dc voltage output, in order to measure the forward and reflected power. The filter is a 9 order. The second harmonic is about -60dB lower than the fundamental. A new conception for low pass filers are also developed in order to absorb the superior harmonic that can cause addition losses on the power FET.

Traditional low pass filter

Innovative low pass filter