Coil for a switching device with a high-frequency power

• US 10,192,663 B2
• Filed: 06/10/2014
• Issued: 01/29/2019
• Est. Priority Date: 07/17/2013
• Status: Active Grant

• Current Assignee: Rohde & Schwarz GmbH & Company KG
• Original Assignee: Rohde & Schwarz GmbH & Company KG
• Inventors: Keller, Klaus
• Primary Examiner(s): Hiltunen, Thomas J.
• Application Number:
  US14/904,774
• Publication Number:
  US 20160155552A1
• Time in Patent Office: 1,694 Days
• Field of Search: None
• CPC Class Codes: H01F 2005/006 with conical spiral form
• CPC Class Codes: H01F 27/006 with special arrangement or spacing of turns of the winding(s), e.g. to produce desired self-resonance
• CPC Class Codes: H01F 5/02 wound on non-magnetic supports, e.g. formers
• CPC Class Codes: H03K 17/74 by the use, as active elements, of diodes by the use of more than one type of semiconductor device H03K17/567; by the use of tunnel diodes H03K17/58; by the use of negative resistance diodes H03K17/70
• CPC Class Codes: H04B 1/48 in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter H04B1/46 takes precedence

Abstract

A coil provides several windings. A first winding is a winding at one edge of the coil, which provides a given first winding diameter and a given first winding spacing relative to the next winding. At the other end of the coil, a last winding provides a given second winding diameter and a given second winding spacing relative to the adjacent winding. In this context, the first winding diameter is larger than the second winding diameter. The first winding spacing in this context is smaller than the second winding spacing.

Claims

1. A coil system comprising a coil and several windings,

wherein a first winding of the coil provides a first winding diameter and a first winding spacing;

wherein a last winding of the coil provides a second winding diameter and a second winding spacing;

wherein the first winding diameter is larger than the second winding diameter;

wherein the first winding spacing is smaller than the second winding spacing;

wherein the coil system further comprises a coil former filling an interior cavity of the coil;

wherein the coil former provides four recesses extending along its longitudinal axis, separated by webs, which are 90°

offset relative to one another with reference to the coil former;

wherein the coil former comprises synthetic material,

wherein the coil former provides a relative permittivity that is no greater than about 1.2;

wherein the windings of the coil are guided in a guide groove of the coil former; and

wherein a wire thickness of the coil is larger than a depth of the guide groove.

2. The coil system according to claim 1,

wherein at least one winding of the coil between the first winding and the last winding provides a third winding spacing and a third winding diameter.

3. The coil system according to claim 2,

wherein the third winding diameter is smaller than the first winding diameter and larger than the second winding diameter.

4. The coil system according to claim 2,

wherein the third winding spacing is larger than the first winding spacing and is smaller than the second winding spacing.

5. The coil system as recited in claim 2,

wherein the third winding diameter ranges from 4 mm to about 20 mm;

and

wherein the third winding spacing ranges from 0.5 mm to about 8 mm.

6. The coil system according to claim 1,

wherein at least one winding of the coil between the first winding and the last winding provides a third winding spacing and a third winding diameter;

wherein the third winding diameter is smaller than the first winding diameter and larger than the second winding diameter; and

wherein the third winding spacing is larger than the first winding spacing and is smaller than the second winding spacing.

7. The coil system as recited in claim 1, wherein the first winding diameter is about 5 mm to about 30 mm.

8. The coil system as recited in claim 1, wherein the second winding diameter is about 3 mm to about 10 mm.

9. The coil system as recited in claim 1, wherein the first winding spacing ranges from 0 to about 4 mm.

10. The coil system as recited in claim 1, wherein the second winding spacing ranges from 1 mm to about 10 mm.

11. The coil system as recited in claim 1,

wherein a winding diameter of the windings of the coil is reduced continuously or via one or more steps from the first winding to the last winding;

and

wherein a winding spacing of the windings of the coil is increased continuously or via one or more steps from the first winding to the last winding.

12. The coil system as recited in claim 1, wherein the windings are not borne by the coil former in the region of the recess.

13. The coil system as recited in claim 1, wherein the coil provides a power-carrying capacity of at least about 500 W with a frequency of about 600 MHz.

14. The coil system according to claim 1,

wherein the coil former includes a first cylindrical part, a second cylindrical part, and a conical part disposed between the first cylindrical part and the second cylindrical part,

wherein a diameter of the first cylindrical part is greater than a diameter of the second cylindrical part,

wherein the conical part includes the webs,

wherein the webs include a first triangular wall extending from a first vertex of the first triangular wall at an outer edge of the first cylindrical part to a second vertex of the first triangular wall at an outer edge of the second cylindrical part,

wherein the webs include a second triangular wall 90°

offset relative to the first triangular wall, and extending from a first vertex of the second triangular wall at the outer edge of the first cylindrical part to a second vertex of the second triangular wall at the outer edge of the second cylindrical part,

wherein the webs include a third triangular wall 90°

offset relative to the second triangular wall, and extending from a first vertex of the third triangular wall at the outer edge of the first cylindrical part to a second vertex of the third triangular wall at the outer edge of the second cylindrical part,

wherein the webs include a fourth triangular wall 90°

offset relative to the third triangular wall, and extending from a first vertex of the fourth triangular wall at the outer edge of the first cylindrical part to a second vertex of the fourth triangular wall at the outer edge of the second cylindrical part,

wherein each of the first, second, third, and fourth triangular walls include a plurality of guide grooves to receive the several windings of the coil,

wherein each of the first, second, third, and fourth triangular walls have a wall thickness that is a fraction of a circumference of the first cylindrical part,

wherein each of the four recesses correspond to empty space within the conical part that is associated with a larger fraction of the circumference of the first cylindrical part relative to the fraction associated with the wall thickness of the first, second, third, and fourth triangular walls and

wherein a first winding from among the several windings of the coil has a diameter that is substantially the same as the diameter of the first cylindrical part, and a second winding from among the several windings of the coil has a diameter that is substantially the same as the diameter of the second cylindrical part.

15. The coil system according to claim 1, wherein the synthetic material of the coil former comprises a foamed synthetic material.

16. The coil system according to claim 15, wherein the foamed synthetic material is polymethacrylimide.

17. A switching device comprising

a first coil comprising several windings;

wherein a first winding of the coil provides a first winding diameter and a first winding spacing,

wherein a last winding of the coil provides a second winding diameter and a second winding spacing,

wherein the first winding diameter is larger than the second winding diameter, and

wherein the first winding spacing is smaller than the second winding spacing;

a coil former filling an interior cavity of the coil, wherein the coil former provides four recesses extending along its longitudinal axis, separated by webs, which are 90°

offset relative to one another with reference to the coil former, wherein the coil former comprises synthetic material, and wherein the coil former provides a relative permittivity that is no greater than about 1.2;

a first PIN diode;

a first signal port;

a second signal port; and

a first control port;

wherein a first control signal can be supplied via the first coil to the first PIN diode;

wherein the first PIN diode can be placed into a conducting state and a non-conducting state via the first control signal;

wherein the windings of the first coil are guided in a guide groove of the coil former; and

wherein a wire thickness of the first coil is larger than a depth of the guide groove.

18. The switching device as recited in claim 17,

wherein, in the case of a conducting first PIN diode, the first signal port is connected to the second signal port in a conducting manner.

19. The switching device as recited in claim 17,

wherein, in the case of a non-conducting first PIN diode, the first signal port is connected to the second signal port in a non-conducting manner.

20. The switching device as recited in claim 17,

wherein the switching device provides a second PIN diode, a third signal port, a second control port, and a second coil;

wherein a second control signal can be supplied via the second coil to the second PIN diode; and

wherein the second PIN diode can be placed into a conducting state and a non-conducting state via the second control signal.

21. The switching device as recited in claim 20, wherein the second coil comprises several windings,

wherein a first winding of the second coil provides a first winding diameter and a first winding spacing,

wherein a last winding of the second coil provides a second winding diameter and a second winding spacing,

wherein the first winding diameter of the second coil is larger than the second winding diameter of the second coil, and

wherein the first winding spacing of the second coil is smaller than the second winding spacing of the second coil.

22. The switching device as recited in claim 20,

wherein, in the case of a conducting first PIN diode, the first signal port is connected to the second signal port in a conducting manner;

and

wherein, in the case of a non-conducting first PIN diode, the first signal port is connected to the second signal port in a non-conducting manner; and

wherein, in the case of a conducting second PIN diode, the third signal port is connected to the second signal port in a conducting manner; and

wherein, in the case of a non-conducting second PIN diode, the third signal port is connected to the second signal port in a non-conducting manner.