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Description
Reflective and reflectionless RF filters play important but different roles in radio frequency systems. Reflective filters, traditionally designed using lumped or distributed elements, reject out-of-band signals by reflecting them back towards the source, potentially causing standing waves and impedance mismatch. In contrast, reflectionless filters absorb out-of-band energy internally, providing matched impedance over a wide frequency range, and minimising signal reflections. Typically, reflective filters are used in analogue RF front-ends dedicated to BPMs.
What might be the effect of the reflected signal on the button and the beam itself? Could it be negligible or should it be taken into account, especially in new generation machines, where beam coupling impedance effects (wakefields) and transfer impedance mismatch are more of a concern compared to older storage rings?
Would it be possible to integrate a reflectionless behaviour directly in the pickup?
