Speaker
Description
Because of aging, and product discontinuity, LANSCE is investigating the replacement of high power RF amplifi-ers. A promising candidate is the GaN solid-state power amplifier (SSPA). The outphasing technique provides high efficiency operation of the SSPA. A key element of the outphasing technique is the signal component separa-tor(SCS), which converts an Amplitude Modulation-Phase Modulation(AM-PM) signal to two PM only sig-nals. In this paper, a design of a digital signal component separator (DSCS) in In-phase/Quadrature(I/Q) coordinate is addressed. In addition, the feedback linearizers are pro-posed to suppress the input disturbances to the SSPA. The DSCS is implemented on the present Field Pro-grammable Gate Array(FPGA) based LANSCE digital low level RF (DLLRF) control system. The performance of the DSCS on the cavity field control system is verified on a low power teststand and the results are reported.
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