INDUCTIVE COUPLING IN TRANSVERSE ELECTROMAGNETIC MODE

• US 20100188171A1
• Filed: 01/28/2010
• Published: 07/29/2010
• Est. Priority Date: 01/29/2009
• Status: Active Grant

• Current Assignee: Emwavedev
• Original Assignee: Emwavedev
• Inventors: El Sabbagh, Mahmoud Amin, Mohajer-Iravani, Baharak
• Granted Patent: US 8,884,722 B2
• Time in Patent Office: Days
• US Class Current: 333/175
• CPC Class Codes: H01P 1/2005 Electromagnetic photonic bandgaps [EPB], or photonic bandgaps [PBG]
• CPC Class Codes: H01P 1/203 Strip line filters
• CPC Class Codes: H01P 1/205 Comb or interdigital filters; Cascaded coaxial cavities H01P1/203 takes precedence
• CPC Class Codes: H01P 1/2053 the coaxial cavity resonators being disposed parall to each other

Abstract

Among other things, a circuit includes a first and a second electromagnetic resonator, each configured to operate in a transverse electromagnetic mode, and a coupling device configured to operate in the transverse electromagnetic mode, wherein the coupling device is connected to the first and second electromagnetic resonators and inductively couples the first and second electromagnetic resonators.

Claims

1. A circuit comprising:

a first and a second electromagnetic resonator, each configured to operate in a transverse electromagnetic mode; and

a coupling device configured to operate in the transverse electromagnetic mode, wherein the coupling device is connected to the first and second electromagnetic resonators and inductively couples the first and second electromagnetic resonators.

2. The circuit of claim 1, wherein the coupling device is directly connected to the first and second electromagnetic resonators.

3. The circuit of claim 1, wherein the first resonator is a cavity resonator.

4. The circuit of claim 1, wherein the first resonator is a planar resonator.

5. The circuit of claim 1, wherein the coupling device is inserted through an opening in a wall shared by the first and second electromagnetic resonators.

6. The circuit of claim 1, wherein the first electromagnetic resonator is a single-mode resonator.

7. The circuit of claim 1, wherein the first electromagnetic resonator is a multi-mode resonator.

8. The circuit of claim 1, wherein the first electromagnetic resonator is one of a combline configuration, a folded-line configuration, and an interdigital configuration.

9. The circuit of claim 1, wherein the first electromagnetic resonator operates in a different mode than the second electromagnetic resonator.

10. The circuit of claim 1, wherein a configuration of the first electromagnetic resonator is different from a configuration of the second electromagnetic resonator

11. The circuit of claim 1, wherein the coupling device is configured to convey a signal from the first resonator to the second resonator.

12. The circuit of claim 11, wherein the coupling device is configured to convey the signal across a magnetic field.

13. The circuit of claim 12, wherein the magnetic field is dominant in strength relative to an electric field.

14. The circuit of claim 1, wherein the coupling device includes a conductive transmission line.

15. The circuit of claim 1, wherein the coupling device includes a metallic material.

16. The circuit of claim 1, wherein the coupling device includes a strip.

17. The circuit of claim 16, wherein the geometry of the strip includes one of a straight shape, meandering shape, a fractal shape, and a spiral shape.

18. The circuit of claim 1, wherein the coupling device includes a bar.

19. The circuit of claim 1, wherein the coupling device includes a rod.

20. The circuit of claim 1, wherein the coupling device includes a cylindrical structure.

21. The circuit of claim 1, wherein the first electromagnetic resonator is configured to operate in a range of radio frequencies.

22. The circuit of claim 1, wherein the first electromagnetic resonator is configured to operate in the range of microwave frequencies.

23. The circuit of claim 1, wherein the first and second electromagnetic resonators are synchronously tuned.

24. The circuit of claim 1, wherein the first and second electromagnetic resonators are asynchronously tuned.

25. The circuit of claim 1, wherein the first resonator is tuned in at least one of an electrical, mechanical, or magnetic manner.

26. The circuit of claim 1, wherein the first and second resonators form a portion of an active component.

27. The circuit of claim 1, wherein the first and second resonators form a portion of a passive component.

28. The circuit of claim 1, wherein the first and second resonators form a portion of a symmetric component.

29. The circuit of claim 1, wherein the first and second resonators form a portion of an asymmetric component.

30. The circuit of claim 1, wherein the first electromagnetic resonator and the coupling device are formed in a substrate.

31. The circuit of claim 1, wherein the first electromagnetic resonator, the second electromagnetic resonator and the coupling device are formed in a substrate.

32. The circuit of claim 1, wherein the first electromagnetic resonator has a length of less than one quarter of the wavelength at the resonant frequency of the first electromagnetic resonator.

33. An apparatus comprising:

a planar frequency filter formed in a dielectric substrate, and having a first and a second planar resonator, each configured to operate in a transverse electromagnetic mode;

at least one feed line connected to the first planar resonator and being capable of providing a signal to the first planar resonator; and

an inductive planar coupling strip connected to the first and second planar resonators, wherein the inductive planar coupling strip is configured to operate in a transverse electromagnetic mode and is capable of conveying portions of the signal from the first planar resonator to the second planar resonator.

34. The apparatus of claim 33, wherein the inductive planar coupling strip is configured to convey the signal across a magnetic field.

35. The apparatus of claim 33, wherein the first planar resonator has a length of less than one quarter of the wavelength at the resonant frequency of the first planar resonator

36. An apparatus comprising:

an inductive coupling device configured to operate in a transverse electromagnetic mode and configured to connect at least two resonators.

37. The apparatus of claim 36, wherein each resonator is configured to operate in a transverse electromagnetic mode.

38. The apparatus of claim 36, wherein each resonator is configured to operate in a transverse electric mode.

39. The apparatus of claim 36, wherein the coupling device is configured to convey a signal across a magnetic field.

40. The apparatus of claim 36, wherein at least one of the two resonators has a length of less than one quarter of the wavelength at the resonant frequency of the one of the two resonators.