US4480240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating rf ground plane from housing
Assignee: Individual
•
Filing: 1982-09-30
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Granted: 1984-10-30
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Expires: 2002-09-30
Abstract
Abstract Apparatus for separating a radio frequency (rf) ground plane from a metal housing in which a circuit board is disposed includes an rf choke and a dielectric layer for separating the housing from the circuit board.
Inventors
- 👤 Harry J. Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:09
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/081; H05; H05K; H05K1/00; H05K1/02; H05K1/0213; H05K1/0237; H05K1/025; H05K1/0253; H05K5/00; H05K5/04; H05K1/0216; H05K2201/00; H05K2201/09; H05K2201/09209; H05K2201/09654; H05K2201/09745; H05K3/00; H05K3/0058; H05K3/0061
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
85 words
Housing apparatus for electronic components, including, in combination: housing means, including bottom means, for receiving electronic components; dielectric means comprising a dc electrical block disposed on the bottom means; circuit board means for electronic components disposed on the dielectric means, including a substrate, a ground plane on the substrate, and a track side on the substrate remote from the ground plane for receiving electronic components; and low impedance areas and high impedance areas on the bottom means defining rf choke means beneath the ground plane.
Claim 2
Dependent Claim
85 words
Housing apparatus for electronic components, including, in combination: housing means, including bottom means, for receiving electronic components; dielectric means comprising a dc electrical block disposed on the bottom means; circuit board means for electronic components disposed on the dielectric means, including a substrate, a ground plane on the substrate, and a track side on the substrate remote from the ground plane for receiving electronic components; and low impedance areas and high impedance areas on the bottom means defining rf choke means beneath the ground plane.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1 in which the low impedance areas comprise planar portions of the bottom means.
Claim 4
Dependent Claim
24 words
The apparatus of claim 2 in which the high impedance areas comprise slot means extending downwardly from the planar portions of the bottom means.
Claim 5
Dependent Claim
24 words
The apparatus of claim 3 in which the slot means includes a plurality of slots spaced apart from each other on the bottom means.
Claim 6
Dependent Claim
38 words
The apparatus of claim 4 in which the housing means further includes side means secured to and extending upwardly from the bottom means and defining with the bottom means a chamber in which the electronic components are disposed.
Claim 7
Dependent Claim
48 words
The apparatus of claim 5 in which the side means includes a pair of side walls spaced apart from each other and a pair of end walls spaced apart from each other, and the plurality of slots are spaced apart from each other and from the end walls.
Claim 8
Dependent Claim
22 words
The apparatus of claim 6 in which the plurality of slots are spaced apart from each other in quarter wave length distances.
Claim 9
Dependent Claim
29 words
The apparatus of claim 7 in which the housing means further includes a top plate secured to the side means for covering the chamber and thereby defining a cavity.
Claim 10
Dependent Claim
29 words
The apparatus of claim 8 in which the housing means further includes mode suppressor means disposed within the cavity and electrically connecting the bottom means and the top plate.
Claim 11
Dependent Claim
25 words
The apparatus of claim 9 in which the mode suppressor means comprises a plurality of conductive strips spaced apart from each other within the cavity.
Claim 12
Dependent Claim
15 words
The apparatus of claim 1 in which the housing means is made of conductive material.
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) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |