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I have two questions.

  1. If the receiver is inductively powered (by LC resonator) and needs a matching network in front of the RF-to-DC rectifier, what kind of quality factor of matching network (or Qs of the capacitor and coil inductance) should I expect? Assume the inductive powering frequency is at 500 MHz.

  2. Since there is a load at the output of rectifier to withdraw the current/power from the resonator, is it a low Q system in nature? If so, will it affect the selection of matching network component precision?

I am quite confused and cannot find some convincing answers. Any insight will be much appreciated. Please correct me if any concept in my description is not right.

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  • \$\begingroup\$ "If the receiver ...". What receiver? A radio receiver? A line receiver? Radio isn't mentioned anywhere in the title, question or tags. Can you edit your question to clarify? Welcome to EE.SE. \$\endgroup\$
    – Transistor
    Oct 1 '17 at 22:17
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    \$\begingroup\$ Any power drawn from a resonator lowers its Q, damping it. This is fundamental. \$\endgroup\$ Oct 1 '17 at 22:26
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    \$\begingroup\$ Do you really want Wireless power transferred (WPT) at 500MHz? Since the load is capacitive when switched on and open when off, it may resemble a pulsed load of low Q when power is received and high Q when not. Max power transfer may be achieved when coupling matches source and load impedance using active PFC and high Q isolated coils on both sides with low turns ratio conducted giving a Z transform to free space on both sides. \$\endgroup\$ Oct 1 '17 at 22:34
  • \$\begingroup\$ Do you have some specific part numbers in mind that you could share? \$\endgroup\$
    – KalleMP
    Oct 2 '17 at 0:33

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