US 9,825,608 C1 (12,832nd)
Method and apparatus for detecting RF field strength
Shahriar Rokhsaz, Austin, TX (US); and Edwin de Angel, Austin, TX (US)
Filed by Shahriar Rokhsaz, Austin, TX (US); and Edwin de Angel, Austin, TX (US)
Assigned to RFMICRON, INC., Austin, TX (US)
Reexamination Request No. 90/019,057, Feb. 4, 2022.
Reexamination Certificate for Patent 9,825,608, issued Nov. 21, 2017, Appl. No. 14/150,392, Jan. 8, 2014.
Application 90/019,057 is a division of application No. 13/209,420, filed on Aug. 14, 2011, granted, now 8,749,319.
Application 12/462,331 is a division of application No. 11/601,085, filed on Nov. 18, 2006, granted, now 7,586,385.
Application 13/209,420 is a continuation in part of application No. 12/462,331, filed on Aug. 1, 2009, granted, now 8,081,043.
Claims priority of provisional application 61/485,732, filed on May 13, 2011.
Claims priority of provisional application 61/428,170, filed on Dec. 29, 2010.
This patent is subject to a terminal disclaimer.
Ex Parte Reexamination Certificate issued on Jan. 30, 2025.
Int. Cl. H03H 7/40 (2006.01); H03J 3/20 (2006.01); H04B 5/00 (2024.01); H04B 5/79 (2024.01)
CPC H03H 7/40 (2013.01) [H03J 3/20 (2013.01); H04B 5/79 (2024.01); H03J 2200/10 (2013.01)]
OG exemplary drawing
AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:
Claims 1-15 are cancelled.
1. In an RF communication system in which an external transmitter electromagnetically couples a signal of predetermined frequency, fc, to a receiver separated by an air gap from the transmitter, a method for dynamically maximizing a received power transfer by adjusting a tuning circuit of the receiver, the tuning circuit comprising an antenna and a capacitor, a capacitance of which can be varied in a selected one of first and second directions, the method comprising the steps of:
(1) selecting one of said first and second directions;
(2) capturing a first current response of the tuning circuit to the signal transmitted by the transmitter;
(3) varying the capacitor in said selected first or second direction;
(4) comparing the captured first response to a second current response of the tuning circuit to the signal currently transmitted by the transmitter;
(5) if the comparison made in step 4 indicates that the second current response is weaker than the captured first response, selecting the other of said directions; and
(6)returning to step 2.