US 11,990,674 B2
Adjustment of near-field gradient probe for the suppression of radio frequency interference and intra-probe coupling
Thomas Lavedas, Bristow, VA (US)
Filed by Thomas Lavedas, Bristow, VA (US)
Filed on Aug. 8, 2022, as Appl. No. 17/818,047.
Application 17/818,047 is a continuation of application No. 16/985,795, filed on Aug. 5, 2020, granted, now 11,431,090.
Application 16/985,795 is a continuation of application No. 15/802,790, filed on Nov. 3, 2017, granted, now 10,756,425, issued on Aug. 25, 2020.
Claims priority of provisional application 62/417,184, filed on Nov. 3, 2016.
Prior Publication US 2023/0034059 A1, Feb. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01Q 7/00 (2006.01); H01Q 1/52 (2006.01); H01Q 7/08 (2006.01); H04B 5/00 (2006.01); H01Q 1/22 (2006.01)
CPC H01Q 1/525 (2013.01) [H01Q 7/08 (2013.01); H04B 5/00 (2013.01); H01Q 1/2216 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A sensor probe comprising:
a first antenna;
a second antenna;
a first variable magnetic coupler comprising:
a ferrite rod;
a first circuit conductor wound around the circumference of the ferrite rod;
a second circuit conductor wound around the circumference of the ferrite rod; and
a control winding disposed normal to the first and second circuit conductors and passing through an axial opening in the ferrite rod, wherein a current applied to the control winding changes an effective permeability of the ferrite rod, such that magnetic coupling between the first and second circuit conductors is altered;
a second variable magnetic coupler comprising:
a ferrite rod;
a first circuit conductor wound around the circumference of the ferrite rod;
a second circuit conductor wound around the circumference of the ferrite rod; and
a control winding disposed normal to the first and second circuit conductors and passing through an axial opening in the ferrite rod, wherein a current applied to the control winding changes an effective permeability of the ferrite rod, such that magnetic coupling between the first and second circuit conductors is altered;
the first circuit conductor of each of the first and second variable magnetic couplers connected to the second antenna and the second circuit conductor of each of the first and second variable magnetic couplers connected to the first antenna; and
a control current supplied to the control winding of one or both of the first and second variable magnetic couplers to control coupling between the first and second circuit conductors of each of the first and second variable magnetic couplers and thereby control coupling between the first and second antennas.