High-pass filter

• US 7,952,451 B2
• Filed: 12/10/2008
• Issued: 05/31/2011
• Est. Priority Date: 12/11/2007
• Status: Expired due to Fees

• Current Assignee: Telegärtner Karl Gärtner GmbH
• Original Assignee: Telegärtner Karl Gärtner GmbH
• Inventors: Beerwerth, Wolfgang
• Primary Examiner(s): Pascal; Robert
• Assistant Examiner(s): Glenn; Kimberly E
• Application Number:
  US12/316,575
• Publication Number:
  US 20090153270A1
• Time in Patent Office: 902 Days
• Field of Search: 333/168, 333/175, 333/181, 333/185, 333/206, 333/207, 333/243
• US Class Current: 333/175
• CPC Class Codes: H01P 1/2007 Filtering devices for biasing networks or DC returns
• CPC Class Codes: H01P 1/202 Coaxial filters cascaded coaxial cavities H01P1/205

Abstract

The invention relates to a high-pass filter comprising a signal line with several capacitors connected in series as well as a ground line, wherein several inductors are connected between the signal line and the ground line. In order to configure the high-pass filter as a coaxial construction it is suggested in accordance with the invention that the signal line form an inner conductor and the ground line an outer conductor of a coaxial conductor, between which an insulation layer is arranged, and that the inductors be designed as discrete components which are arranged at a distance to one another and between which at least one impedor is connected.

Claims

1. High-pass filter comprising:

a signal line with several capacitors connected in series,

a ground line,

several inductors connected between the signal line and the ground line,

the signal line forming an inner conductor and the ground line forming an outer conductor of a coaxial conductor, and

an insulation layer arranged between the inner conductor and the outer conductor,

wherein;

the inductors are designed as discrete components arranged at a distance to one another,

at least one impedor is connected between the inductors, and

the capacitors connected in series relative to one another in the inner conductor are designed to be identical with respect to at least one of their electrical and mechanical properties.

2. High-pass filter as defined in claim 1, wherein at least one of the several inductors is designed as a spiral coil.

3. High-pass filter as defined in claim 1, wherein the inductors are designed to be at least one of electrically and mechanically identical.

4. High-pass filter as defined in claim 1, wherein the at least one impedor is designed as a line section of the inner conductor.

5. High-pass filter as defined in claim 1, wherein the capacitors connected in series relative to one another in the inner conductor are designed as plate or tubular capacitors.

6. High-pass filter as defined in claim 1, further comprising:

at least one Pi-type element formed by a pair of the inductors connected between the inner conductor and the outer conductor, and a first of the capacitors, a first of the at least one impedors and a second of the capacitors connected in series relative to one another in the inner conductor between the pair of the inductors.

7. High-pass filter as defined in claim 6, wherein the first and the second of the capacitors are designed as plate or tubular capacitors.

8. High-pass filter as defined in claim 6, wherein the first of the at least one impedors connected between the first and the second of the capacitors is designed as a line section of the inner conductor.

9. High-pass filter as defined in claim 8, wherein the line section has a front and a rear electrically conductive contact sleeve, each of the sleeves accommodating a dielectric insulating sleeve, an end piece of an additional line section of the inner conductor engaging in said insulating sleeve.

10. High-pass filter as defined in claim 9, wherein the front and rear contact sleeves are connected in one piece to the line section connecting the first and the second of the capacitors to one another.

11. High-pass filter as defined in claim 6, wherein:

the at least one Pi-type element comprises two Pi-type elements connected to one another via a second of the at least one impedors.

12. High-pass filter as defined in claim 11, wherein the second of the at least one impedors is designed as a line section of the inner conductor.

13. High-pass filter as defined in claim 11, wherein the two Pi-type elements are of an identical design with respect to at least one of their electrical and mechanical properties.

14. High-pass filter as defined in claim 1, wherein an additional capacitor is connected in series between at least one of the inductors and the outer conductor.

15. High-pass filter as defined in claim 14, wherein a connection for at least one of the feeding in and tapping of a supply or control voltage is arranged between at least one of the inductors and the additional capacitor connected in series to it.

16. High-pass filter as defined in claim 1, wherein the high-pass filter is adapted to be inserted into a coaxial transmission line.

17. High-pass filter as defined in claim 1, wherein the outer conductor forms a rigid housing part of the high-pass filter.

18. High-pass filter as defined in claim 17, wherein the insulation layer lines the housing part on an inner side at least in sections.

19. High-pass filter as defined in claim 18, wherein the insulation layer forms a dielectric of at least one additional capacitor connected in series to a corresponding one of the inductors.

20. High-pass filter as defined in claim 1, wherein at least one of the inductors forms a mechanical spacer between the inner conductor and the outer conductor.

21. High-pass filter comprising:

a signal line with several capacitors connected in series,

a ground line,

several inductors connected between the signal line and the ground line,

the signal line forming an inner conductor and the ground line forming an outer conductor of a coaxial conductor; and

an insulation layer arranged between the inner conductor and the outer conductor,

wherein;

the inductors are designed as discrete components arranged at a distance to one another,

at least one impedor is connected between the inductors, and

the at least one impedor is designed as a line section of the inner conductor.

22. High-pass filter comprising:

a signal line with several capacitors connected in series,

a ground line,

several electrically and mechanically identical inductors connected between the signal line and the ground line,

the signal line forming an inner conductor and the ground line forming an outer conductor of a coaxial conductor, and

an insulation layer arranged between the inner conductor and the outer conductor,

wherein;

the inductors are designed as discrete components arranged at a distance to one another,

at least one impedor is connected between the inductors,

the capacitors connected in series relative to one another in the inner conductor are designed to be identical with respect to their electrical and mechanical properties,

at least one Pi-type element is formed by a pair of the inductors connected between the inner conductor and the outer conductor, and a first of the capacitors, one of the at least one impedors and a second of the capacitors connected in series relative to one another in the inner conductor between the pair of the inductors, and

an additional capacitor is connected in series between each of the inductors and the outer conductor, a connection for at least one of the feeding in and tapping of a supply or control voltage is arranged between at least one of the inductors and the additional capacitor connected in series to it.