COIL FOR A SWITCHING DEVICE WITH A HIGH-FREQUENCY POWER

• US 20160155552A1
• Filed: 06/10/2014
• Published: 06/02/2016
• 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
• Granted Patent: US 10,192,663 B2
• Time in Patent Office: Days
• 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 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.

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

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

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

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

11. The coil 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 as recited in claim 1,

wherein an interior cavity of the coil is filled with air.

13. The coil as recited in claim 1,

wherein an interior cavity of the coil is filled with a coil former.

14. The coil as recited in claim 13,

wherein the coil former comprises synthetic material, and

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

15. The coil as recited in claim 13, wherein the windings of the coil are guided in a guide groove of the coil former.

16. The coil as recited in claim 13, wherein the coil former provides at least one recess extending along its longitudinal axis, and wherein the windings are not borne by the coil former in the region of the recess.

17. The coil 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.

18. 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 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; and

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

19. The switching device as recited in claim 18,

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.

20. The switching device as recited in claim 18,

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.

21. The switching device as recited in claim 18,

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.

22. The switching device as recited in claim 21, 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.

23. The switching device as recited in claim 21,

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.

24. A coil former for use in forming an electrical coil comprising several windings, the coil former having a generally conical shape, the coil former comprising:

a first, relatively larger end;

a second, relatively smaller end;

a spiral track along the exterior of the coil former, the spiral track configured to accept an electrically conductive wire to thereby form said electrical coil comprising said several windings,

wherein the spiral track across the coil former proximate to the first end has a first diameter and wherein adjacent loops of the spiral track proximate to the first end have a first spacing between said adjacent loops;

wherein the spiral track across the coil former proximate to the second end has a second diameter and wherein adjacent loops of the spiral track proximate to the second end have a second spacing between said adjacent loops of the spiral track proximate to the second end;

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

wherein the first spacing is smaller than the second spacing.

25. The coil former according to claim 24, wherein the spiral track further has an intermediate loop between the first end and the second end, wherein the intermediate loop has a third diameter and a third spacing between the intermediate loop and a loop adjacent to the intermediate loop, wherein the third diameter is smaller than the first diameter and larger than the second diameter, and wherein the third spacing is larger than the first spacing and smaller than the second spacing.