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Patent US4837581A successfully refreshed from Google Patents.
US4837581A
Expired / Lapsed
US
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Device for the EMI testing of electronic systems
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1987-05-11
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Granted: 1989-06-06
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Expires: 2007-05-11
Abstract
Abstract The device according to the invention exhibits a TEM waveguide (1), which opens out in a pyramid shape and which is closed by a wall (7) of high-frequency peak absorbers (7.1) and which exhibits an asymmetrically disposed, plate-shaped inner line (6), which is connected to a plurality of terminal resistors (8.1, 8.2, 8.3) through the absorber wall (7). The TEM waveguide (1) further exhibits a closed outer line (5). The absorber wall (7) is curved in the manner of a spherical segment, the center of curvature being situated in the region of the tip (2) of the pyramid-shaped TEM waveguide (1).
Inventors
- 👤 Diethard Hansen
- 👤 Dietrich Konigstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:08
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/08; G01R29/0807; G01R29/0814; G01R29/0821; G01R29/0828; H; H01; H01Q; H01Q17/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A device for the EMI testing of electronic systems having a TEM waveguide (1), which opens out in a pyramid shape and which is terminated by a wall (7) of high-frequency peak absorbers (7.1) and which exhibits an asymmetrically disposed, plate-shaped inner line (6), which is connected to a number of terminal resistors (8.1, 8.2, 8.3) through the absorber wall (7), wherein the TEM waveguide (1) exhibits a closed outer line (5), wherein the absorber wall (7) is curved in the manner of a spherical segment, and wherein the center of curvature is situated in the region of the tip (2) of the pyramid-shaped TEM waveguide (1).
Claim 2
Independent Claim
107 words
A device for the EMI testing of electronic systems having a TEM waveguide (1), which opens out in a pyramid shape and which is terminated by a wall (7) of high-frequency peak absorbers (7.1) and which exhibits an asymmetrically disposed, plate-shaped inner line (6), which is connected to a number of terminal resistors (8.1, 8.2, 8.3) through the absorber wall (7), wherein the TEM waveguide (1) exhibits a closed outer line (5), wherein the absorber wall (7) is curved in the manner of a spherical segment, and wherein the center of curvature is situated in the region of the tip (2) of the pyramid-shaped TEM waveguide (1).
Claim 3
Dependent Claim
47 words
The device as claimed in claim 1, wherein the inner line (6) is separated, in the region directly before passage through the absorber wall (7), into a plurality, preferably into three parallel partial lines (6.1, 6.2, 6.3), to which respective terminal resistors (8.1, 8.2, 8.3) are connected
Claim 4
Dependent Claim
49 words
The device as claimed in claim 2, wherein the inner line (6) is divided into the partial lines (6.1, 6.2, 6.3) dimensioned such that the same surface charge or the same partial characteristic impedance is allocated to each one of the partial lines in the course of wave propagation.
Claim 5
Dependent Claim
24 words
The device as claimed in claim 2, wherein equally large terminal resistors (8.1, 8.2, 8.3) are connected to the partial lines (6.1, 6.2, 6.3).
Claim 6
Dependent Claim
62 words
The device as claimed in claim 2, wherein the partial lines (6.1, 6.2, 6.3) taper acutely towards the terminal resistors (8.1, 8.2, 8.3), and wherein the taper of their width is dimensioned such that the capacitive covering, which increases in the absorber wall (7) towards the terminal resistors, is just compensated in its effect on the characteristic impedance or partial characteristic impedance.
Claim 7
Dependent Claim
37 words
The device as claimed in claim 1, wherein the TEM waveguide (1) exhibits a removable feed wedge (1.2), the longitudinal extent of which corresponds approximately to one tenth of the total length of the TEM waveguide (1).
Claim 8
Dependent Claim
51 words
The device as claimed in claim 6, wherein the removable feed wedge (1.2) is sealed in a gas-tight manner on all sides, in relation to the remaining part of the TEM waveguide (1), in particular by means of a dielectric foil, and is preferably constructed even to accommodate an excess pressure.
Claim 9
Dependent Claim
31 words
The device as claimed in claim 7, wherein the volume of the removable feed wedge (1.2) of the TEM waveguide (1) is filled with SF 6 gas, preferably under excess pressure.
Claim 10
Dependent Claim
24 words
The device as claimed in claim 1, wherein the terminal resistors (8.1, 8.2, 8.3) are constructed as high-tension resistors for at least 100 kV.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |