Abstract
This paper presents an analog predistortion (APD) linearizer suitable for V-band traveling wave tube power amplifier. A new "field-circuit combination" design method based on the Schottky barrier diode (SBD) three-dimensional electromagnetic simulation model (3D EM Model) is used. A reflection type APD linearizer consisting of a 90° waveguide 3dB hybrid and two SBDs is developed and tested. The actual measurement results show that within the input power range of - 25~10dBm, the gain expansion is more than 7.8dB and the phase expansion is over 28° in the frequency band 59.1~61.1GHz.
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