Broadband balance power amplifier based on GaN
A power amplifier and balanced technology, applied to amplifiers with distributed constants in the coupling network, etc., can solve problems such as high cost, unsuitable for broadband power amplifier design, and degradation of harmonic tuning performance, and achieve low cost
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[0023] figure 1 It is a schematic diagram of the S-band balanced power amplifier circuit, including Lange couplers, microstrip transmission lines, Banding gold wires, filter inductors, stable resistors, and wide bandgap GaN-based HEMTs; the microstrip transmission line model is a 100um high-impedance micro With a transmission line; the model of the GaN-based HEMT (H) is NRF01-02a HEMT die; the Lange coupler is a four-wire 3dB coupled Lange coupler with a characteristic impedance of 50Ω, and the Lange coupler is based on an alumina ceramic substrate design.
[0024] figure 2 It is the power amplifier bias circuit of the power amplifier, including T-shaped connectors, microstrip transmission lines, filter capacitors, stabilizing resistors, and GaN-based HEMTs. The eighth filter capacitor (C8) and the tenth filter capacitor (C10) are 100pF capacitors , the seventh filter capacitor (C7) and ninth filter capacitor (C9) use 100uF electrolytic capacitors, and the sixth filter capa...
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