US 12,241,923 B2
Electrically small self-resonant electro-quasistatic exciter and detector with canceled magnetic field
Darmindra D. Arumugam, Pasadena, CA (US); and Jack D. Bush, Pasadena, CA (US)
Assigned to CALIFORNIA INSTITUTE OF TECHNOLOGY, Pasadena, CA (US)
Filed by CALIFORNIA INSTITUTE OF TECHNOLOGY, Pasadena, CA (US)
Filed on Oct. 26, 2021, as Appl. No. 17/511,464.
Application 17/511,464 is a continuation of application No. PCT/US2020/031939, filed on May 7, 2020.
Claims priority of provisional application 62/914,017, filed on Oct. 11, 2019.
Claims priority of provisional application 62/846,451, filed on May 10, 2019.
Prior Publication US 2022/0052457 A1, Feb. 17, 2022
Int. Cl. G01R 29/12 (2006.01)
CPC G01R 29/12 (2013.01) 9 Claims
OG exemplary drawing
 
1. A method for electroquasistatic excitation comprising:
generating electrical energy from a radio-frequency generator;
electrically coupling the electrical energy to a plurality of inductive elements, whereby the plurality of inductive elements generate a radiated magnetic field and a radiated electric field, the plurality of inductive elements comprising a first helix of conductive elements wound around a first arm of an antenna and a second helix of conductive elements wound around a second arm of the antenna, the first arm being opposite the second arm, the first helix being wound in a direction opposite a winding of the second helix; and
configuring the plurality of inductive elements to reduce the radiated magnetic field by driving the first arm differentially from the second arm by a differential center feed between the first arm and the second arm;
wherein electrically coupling the electrical energy to the plurality of inductive elements comprises:
coupling the electrical energy to a first plurality of inductive elements, whereby the first plurality of inductive elements generate a first magnetic dipole moment and a first electric dipole moment;
coupling the electrical energy to a second plurality of inductive elements, whereby the second plurality of inductive elements generate a second magnetic dipole moment and a second electric dipole moment; and
wherein configuring the plurality of inductive elements comprises:
configuring the first plurality of inductive elements and the second plurality of inductive elements to reduce a magnetic field resulting from a combination of the first magnetic dipole moment and the second magnetic dipole moment.