Planar transmission line resonator frequency control of localized transducers

• US 10,553,462 B2
• Filed: 07/03/2019
• Issued: 02/04/2020
• Est. Priority Date: 05/26/2016
• Status: Active Grant

• Current Assignee: Anand Deo
• Original Assignee: Anand Deo
• Inventors: Deo, Anand
• Primary Examiner(s): Chang, Joseph
• Application Number:
  US16/502,989
• Publication Number:
  US 20200013644A1
• Time in Patent Office: 216 Days
• Field of Search: 331 96
• CPC Class Codes: A61F 7/12 Devices for heating or cooling internal body cavities
• CPC Class Codes: H01L 21/324 Thermal treatment for modifying the properties of semiconductor bodies, e.g. annealing, sintering H01L21/20 - H01L21/288 and H01L21/302 - H01L21/322 take precedence
• CPC Class Codes: H01L 21/67103 mainly by conduction
• CPC Class Codes: H01L 21/67248 Temperature monitoring
• CPC Class Codes: H05B 1/023 Industrial applications
• CPC Class Codes: H05B 6/50 for monitoring or control

Abstract

Localized heating can be provided using fixed-frequency planar transmission line resonators arranged along a main-line, and tuning an electromagnetic input signal frequency applied to the main line to selectively address and energize one or more planar resonators for also addressing and energizing one or more correspondingly located active substrate transducer heat sources for depositing heat in an adjacent active substrate. More generally, adjusting input signal frequency to select one or more planar resonators arranged along a main line can be used to selectively address and energize an electromagnetic-to-heat, an electromagnetic-to-vibration, or other transducer to controllably direct energy toward a desired transducer load.

Claims

1. A transmission line based control device for an integrated transducer, the device comprising:

a substrate providing or coupled to the transducer;

a resonator configured to receive an AC electromagnetic input signal directly, or via an electrically conductive main line coupled with the resonator, wherein the resonator is configured to resonate at its characteristic AC electromagnetic input signal frequency to energize the transducer at a first energy level, and wherein the resonator is also configured to be off-resonance at a frequency different from its characteristic AC electromagnetic input signal frequency to energize the transducer at a second energy level that is less than the first energy level, thereby providing variable frequency control of energizing the transducer.

2. The device of claim 1, wherein the transducer includes at least one of a electromagnetic-to-heat transducer or an electromagnetic-to-vibration transducer.

3. The device of claim 1, comprising a plurality of resonators, respectively co-located with corresponding electromagnetic-to-heat transducers, at different locations along the main line, wherein the substrate comprises a lossy dielectric substrate, and wherein:

an individual first one of the resonators is configured to resonate at a first characteristic AC electromagnetic input signal frequency to generate heat in the substrate at the co-located first one of the electromagnetic-to-heat transducers; and

an individual second one of the resonators is configured to be off-resonance at the first characteristic AC electromagnetic input signal frequency, to generate less heat in the substrate at the co-located second one of the electromagnetic-to-heat transducers than is generated in the first one of the electromagnetic-to-heat transducers at the first characteristic AC electromagnetic input signal frequency.

4. The device of claim 1, comprising:

a tap-line between the resonator and the main line, the tap-line arranged to provide an electrically conductive or inductively-coupled connection between the resonator and the main line.

5. The device of claim 1, comprising:

a capacitive coupler between the resonator and the main line, the capacitive coupler arranged to provide a capacitively-coupled connection between the resonator and the main line.

6. The device of claim 1, comprising:

a hybrid coupler between the resonator and the main line, the hybrid coupler arranged to provide, in series, both of;

(1) an electrically conductive or inductively-coupled connection between the resonator and the main line; and

(2) a capacitively-coupled connection between the resonator and the main line.

7. The device of claim 1, comprising:

a second resonator, arranged in a cascade with the first resonator so as to share at least one of a tap-line, a capacitive coupler, or a hybrid coupler with the first resonator.

8. The device of claim 1, comprising first and second resonators that are configured to be independently addressed using different characteristic AC electromagnetic input signal frequencies.

9. The device of claim 1, comprising a plurality of resonators, wherein respective ones of the resonators are arranged to provide sufficient frequency-domain spacing between corresponding characteristic AC electromagnetic input signal frequencies of corresponding resonators such that ones or groups of the resonators are selectively addressable by applying a variable frequency of the received AC electromagnetic input signal.

10. The device of claim 1, wherein the resonator is configured such that its characteristic AC electromagnetic input signal frequency is configured including based on a property of the substrate in composite with a property of an operating environment in which the resonator is to be located.

11. The device of claim 1, wherein the resonator includes a planar resonator arranged in a flat or curved plane within a lossy dielectric active substrate or with a lossy dielectric substrate facing each opposing surface of the flat or curved plane.

12. The device of claim 11, wherein the resonator includes a planar resonator arranged in a flat or curved plane, wherein a thickness of the lossy dielectric active substrate, with respect to at least one electrically conductive portion of the planar resonator or with respect to an operating environment, varies with respect to at least one of different locations of electrically conductive portions of the planar resonator within the resonator.

13. The device of claim 1, wherein the substrate includes a more lossy first dielectric portion adjacent to the planar resonator than a less lossy second dielectric portion that is adjacent to the main line.

14. A method of using a transmission line based control device to control a transducer, the method comprising:

receiving an AC electromagnetic input signal;

using the received AC electromagnetic input signal at a first frequency to resonate a resonator at a characteristic AC electromagnetic input signal frequency to energize the transducer at a first energy level; and

using the received AC electromagnetic input signal at a second frequency to put the resonator off-resonance at a frequency different from the characteristic AC electromagnetic input signal frequency to energize the transducer at a second energy level that is less than the first energy level, thereby providing variable frequency control of energizing the transducer.

15. The method of claim 14, wherein the energizing the transducer includes at least one of heating or vibrating.

16. The method of claim 14, comprising:

receiving the AC electromagnetic input signal at a first resonator, at its first characteristic AC electromagnetic input signal frequency, to energize a first transducer co-located with the first resonator; and

receiving the AC electromagnetic input signal to be off-resonance at a second resonator, at the first characteristic AC electromagnetic input signal frequency, to energize a second transducer co-located with the second resonator at a level less than that of the first transducer.

17. The method of claim 14, comprising at least one of inductively coupling the received AC electromagnetic input signal to the resonator or capacitively coupling the received AC electromagnetic input signal to the resonator.

18. The method of claim 14, further comprising independently addressing first and second resonators having different characteristic AC electromagnetic input signal frequencies by receiving a variable frequency of the received AC electromagnetic input signal.