US7597590B2
Active / In Force
US
⏱️ 1.8 years remaining
Electromagnetic interference (EMI) collar and method for use with a pluggable optical transceiver module
Assignee: Broadcom International Pte Ltd
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Filing: 2008-09-05
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Granted: 2009-10-06
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Expires: 2028-09-05
Abstract
Abstract An EMI collar is provided that is configured to be secured about a housing of a pluggable optical transceiver module. The configuration of the EMI collar and the method by which the collar is attached to the housing of the transceiver module ensures that the collar will not be damaged when the transceiver module housing is inserted into a cage. Ensuring that the collar will not be damaged during insertion ensures that electrically conductive contact points on the collar will not be eliminated by insertion of the housing into a cage. In addition, dimples, or indentations, formed on the spring fingers of the EMI collar result in additional electrically conductive contact points on the fingers that result in a reduction in the size of the maximum EMI aperture dimension of the collar. Reducing the maximum EMI aperture dimension of the collar greatly improves the ability of the collar to attenuate EMI signals, even EMI signals having high frequencies.
Inventors
- 👤 Laurence R. McColloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:57
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4292; H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0009; G02B6/4201; G02B6/4256; G02B6/426; G02B6/4261; G02B6/4274; G02B6/4277; H01; H01R; H01R13/00; H01R13/648; H01R13/658; H01R13/6581; H01R13/6582; H05K9/0018; H05K9/0058; G02B6/4246; G02B6/4293; H05K9/0015; H05K9/0016; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/49218
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
184 words
An electromagnetic interference (EMI) collar for use with an optical transceiver module, the EMI collar comprising: a band having an inner surface and an outer surface, wherein the EMI collar is configured to be secured to a housing of the optical transceiver module by securing the band to the housing such that the inner surface of the band is in contact with an outer surface of the housing, the band comprising an electrically conductive material; and a plurality of spring fingers, the spring fingers comprising an electrically conductive material, each spring finger having a proximal end that is connected to the band and a distal end that extends away from the band, each spring finger having at least one respective dimple formed therein between the proximal and distal ends of the respective spring finger, wherein each dimple is an indentation in an outer surface of the spring finger that creates at least two additional electrically conductive contact points, said at least two additional electrically conductive contact points being located at first and second ends of the respective dimple formed on the respective spring finger.
Claim 2
Dependent Claim
184 words
An electromagnetic interference (EMI) collar for use with an optical transceiver module, the EMI collar comprising: a band having an inner surface and an outer surface, wherein the EMI collar is configured to be secured to a housing of the optical transceiver module by securing the band to the housing such that the inner surface of the band is in contact with an outer surface of the housing, the band comprising an electrically conductive material; and a plurality of spring fingers, the spring fingers comprising an electrically conductive material, each spring finger having a proximal end that is connected to the band and a distal end that extends away from the band, each spring finger having at least one respective dimple formed therein between the proximal and distal ends of the respective spring finger, wherein each dimple is an indentation in an outer surface of the spring finger that creates at least two additional electrically conductive contact points, said at least two additional electrically conductive contact points being located at first and second ends of the respective dimple formed on the respective spring finger.
Claim 3
Dependent Claim
42 words
The EMI collar of claim 1 , wherein each spring finger has a bend formed therein between the proximal and distal ends of the spring finger, and wherein the respective dimples are formed at the respective bends in the respective spring fingers.
Claim 4
Dependent Claim
55 words
The EMI collar of claim 2 , wherein each respective dimple has a length, L, corresponding to a distance between the first and second ends of each respective dimple, and wherein L is less than or equal to one quarter of a wavelength of an EMI signal intended to be attenuated by the EMI collar.
Claim 5
Dependent Claim
55 words
The EMI collar of claim 2 , wherein each respective dimple has a length, L, corresponding to a distance between the first and second ends of the respective dimple, and wherein L is less than or equal to one eighth of a wavelength of an EMI signal intended to be attenuated by the EMI collar.
Claim 6
Dependent Claim
55 words
The EMI collar of claim 2 , wherein each respective dimple has a length, L, corresponding to a distance between the first and second ends of each respective dimple, and wherein L is less than or equal to one tenth of a wavelength of an EMI signal intended to be attenuated by the EMI collar.
Claim 7
Dependent Claim
56 words
The EMI collar of claim 2 , wherein the band has first and second ends that overlap to form a lap joint, and wherein the band is secured to the transceiver module housing by welding one or more areas on the lap joint to cause the band to tighten about the housing of the transceiver module.
Claim 8
Dependent Claim
35 words
The EMI collar of claim 6 , wherein the tightening of the band corresponds to a pre-loading of the band that places the inner surface of the band in substantially continuous contact with the housing.
Claim 9
Dependent Claim
41 words
The EMI collar of claim 1 , wherein the band has an opening formed therein that is configured to allow a latch lock pin of a latching mechanism of the transceiver module to be inserted into and retracted through the opening.
Claim 10
Independent Claim
150 words
A method for providing EMI shielding in an optical transceiver module comprising: providing an EMI collar comprising a band and a plurality of spring fingers, the band having an inner surface and an outer surface, wherein the EMI collar is configured to be secured to a housing of an optical transceiver module by securing the band to the housing such that the inner surface of the band is in contact with an outer surface of the housing, each of the spring fingers having a proximal end that is connected to the band and a distal end that extends away from the band, and wherein the band has first and second ends that overlap to form a lap joint; and securing the EMI collar to the module housing by welding one or more areas on the lap joint to cause the band to tighten about the housing of the transceiver module.
Claim 11
Independent Claim
150 words
A method for providing EMI shielding in an optical transceiver module comprising: providing an EMI collar comprising a band and a plurality of spring fingers, the band having an inner surface and an outer surface, wherein the EMI collar is configured to be secured to a housing of an optical transceiver module by securing the band to the housing such that the inner surface of the band is in contact with an outer surface of the housing, each of the spring fingers having a proximal end that is connected to the band and a distal end that extends away from the band, and wherein the band has first and second ends that overlap to form a lap joint; and securing the EMI collar to the module housing by welding one or more areas on the lap joint to cause the band to tighten about the housing of the transceiver module.
Claim 12
Dependent Claim
23 words
The method of claim 9 , wherein said one or more areas on the lap joint are welded using a spot welding procedure.
Claim 13
Dependent Claim
23 words
The method of claim 9 , wherein said one or more areas on the lap joint are welded using a laser welding procedure.
Claim 14
Dependent Claim
34 words
The method of claim 9 , wherein the tightening of the band corresponds to a pre-loading of the band that places the inner surface of the band in substantially continuous contact with the housing.
Claim 15
Dependent Claim
83 words
The method of claim 9 , wherein each spring finger has at least one respective dimple formed therein between the proximal and distal ends of the respective spring finger, wherein each dimple is an indentation in an outer surface of the spring finger that creates at least two additional electrically conductive contact points on the spring finger, said at least two additional electrically conductive contact points being located at first and second ends of the respective dimple formed on the respective spring finger.
Claim 16
Dependent Claim
41 words
The method of claim 13 , wherein each spring finger has a bend formed therein between the proximal and distal ends of the spring finger, and wherein the respective dimples are formed at the respective bends in the respective spring fingers.
Claim 17
Dependent Claim
54 words
The method of claim 14 , wherein each respective dimple has a length, L, corresponding to a distance between the first and second ends of the respective dimple, and wherein L is less than or equal to one quarter of a wavelength of an EMI signal intended to be attenuated by the EMI collar.
Claim 18
Dependent Claim
54 words
The method of claim 14 , wherein each respective dimple has a length, L, corresponding to a distance between the first and second ends of the respective dimple, and wherein L is less than or equal to one eighth of a wavelength of an EMI signal intended to be attenuated by the EMI collar.
Claim 19
Dependent Claim
54 words
The method of claim 14 , wherein each respective dimple has a length, L, corresponding to a distance between the first and second ends of the respective dimple, and wherein L is less than or equal to one tenth of a wavelength of an EMI signal intended to be attenuated by the EMI collar.
Claim 20
Dependent Claim
40 words
The method of claim 9 , wherein the band has an opening formed therein that is configured to allow a latch lock pin of a latching mechanism of the transceiver module to be inserted into and retracted through the opening.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2012-10-05 | 2013-04-06 | 2013-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2016-10-05 | 2017-04-06 | 2017-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2020-10-05 | 2021-04-06 | 2021-10-06 | $7700.00 | Window Closed / Lapsed |