US6366380B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical transceiver EMI detuning device
Assignee: Cisco Technology Inc
•
Filing: 1999-02-12
•
Granted: 2002-04-02
•
Expires: 2019-02-12
Abstract
Abstract A transceiver for the transmission and reception of high speed optical signals contains a detuning structure which reduces the gain for quarter wave radiation of Electro Magnetic Radiation (EMI). A conductive housing couples light energy from a source or a detector to an external fiber having a metallic ferrule. The conductive housing also is referenced to the chassis enclosure of the transceiver thereby attenuating the quarter wave radiator.
Inventors
- 👤 Jay A. Chesavage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:06
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/40; G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4274; G02B6/4277; G02B6/4246; G02B6/4292
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
155 words
An optical transceiver comprising: a transmitter having an electrical to optical converter with an electrical input and an optical output, said optical output coupling transmit optical energy to a first cylindrical housing, said cylindrical housing having an aperture for receiving a mating optical ferrule which receives said transmit optical energy; a receiver having an optical to electrical converter with an optical input and an electrical output, said optical input coupling receive optical energy from a second cylindrical housing having an aperture for receiving a mating optical ferrule containing said receive optical energy; an enclosure containing said transmitter and said receiver; a conductive collar shield surrounding said first cylindrical housing and said second cylindrical housing and said optical to electrical converter and said electrical to optical converter; a first shield extension disposed between said first cylindrical housing and said collar shield, and a second shield extension disposed between said second cylindrical housing and said collar shield.
Claim 2
Dependent Claim
155 words
An optical transceiver comprising: a transmitter having an electrical to optical converter with an electrical input and an optical output, said optical output coupling transmit optical energy to a first cylindrical housing, said cylindrical housing having an aperture for receiving a mating optical ferrule which receives said transmit optical energy; a receiver having an optical to electrical converter with an optical input and an electrical output, said optical input coupling receive optical energy from a second cylindrical housing having an aperture for receiving a mating optical ferrule containing said receive optical energy; an enclosure containing said transmitter and said receiver; a conductive collar shield surrounding said first cylindrical housing and said second cylindrical housing and said optical to electrical converter and said electrical to optical converter; a first shield extension disposed between said first cylindrical housing and said collar shield, and a second shield extension disposed between said second cylindrical housing and said collar shield.
Claim 3
Dependent Claim
28 words
The transceiver of claim 1 where said conductive collar shield comprises a continuous foil band having a central axis parallel to the central axis of said cylindrical ferrule.
Claim 4
Dependent Claim
45 words
The transceiver of claim 2 where said conductive collar shield comprises said enclosure being made from a material having a bulk resistivity less than 0.2 ohm-cm for frequencies ranging from the fundamental frequency of the communication link through the 7th harmonic of said fundamental frequency.
Claim 5
Dependent Claim
25 words
The transceiver of claims 2 or 3 where said shield extension comprises a foil conductor at least as wide as said transmit or receive housing.
Claim 6
Dependent Claim
42 words
The transceiver of claim 2 or 3 where said shield extension comprises a conductive material having a bulk resistivity less than 0.2 ohm-cm for frequencies ranging from the fundamental frequency of the communication link through the 7th harmonic of said fundamental frequency.
Claim 7
Dependent Claim
42 words
The transceiver of claim 2 or 3 where said shield extension comprises a conductive epoxy having a bulk resistivity less than 0.2 ohm-cm for frequencies ranging from the fundamental frequency of the communication link through the 7th harmonic of said fundamental frequency.
Claim 8
Dependent Claim
74 words
An optical transmitter comprising: a transmitter having an electrical to optical converter with an electrical input and an optical output, said optical output coupling transmit optical energy to a cylindrical housing, said cylindrical housing having an aperture for receiving a mating optical ferrule; an enclosure containing said transmitter; a conductive collar shield surrounding said cylindrical housing and said electrical to optical converter; a shield extension disposed between said cylindrical housing and said collar shield.
Claim 9
Dependent Claim
74 words
An optical transmitter comprising: a transmitter having an electrical to optical converter with an electrical input and an optical output, said optical output coupling transmit optical energy to a cylindrical housing, said cylindrical housing having an aperture for receiving a mating optical ferrule; an enclosure containing said transmitter; a conductive collar shield surrounding said cylindrical housing and said electrical to optical converter; a shield extension disposed between said cylindrical housing and said collar shield.
Claim 10
Dependent Claim
28 words
The transmitter of claim 7 where said conductive collar shield comprises a continuous foil band having a central axis parallel to the central axis of said cylindrical ferrule.
Claim 11
Dependent Claim
45 words
The transmitter of claim 7 where said conductive collar shield comprises said enclosure being made from a material having a bulk resistivity less than 0.2 ohm-cm for frequencies ranging from the fundamental frequency of the communication link through the 7th harmonic of said fundamental frequency.
Claim 12
Dependent Claim
23 words
The transmitter of claims 8 or 9 where said shield extension comprises a foil conductor at least as wide as said transmit housing.
Claim 13
Dependent Claim
42 words
The transmitter of claim 8 or 9 where said shield extension comprises a conductive material having a bulk resistivity less than 0.2 ohm-cm for frequencies ranging from the fundamental frequency of the communication link through the 7th harmonic of said fundamental frequency.
Claim 14
Dependent Claim
42 words
The transmitter of claim 8 or 9 where said shield extension comprises a conductive epoxy having a bulk resistivity less than 0.2 ohm-cm for frequencies ranging from the fundamental frequency of the communication link through the 7th harmonic of said fundamental frequency.
Claim 15
Dependent Claim
77 words
An optical receiver comprising: a receiver having an optical to electrical converter with an optical input and an electrical output, said optical input coupling optical energy from a cylindrical housing having an aperture for receiving a mating optical ferrule to said optical to electrical converter; an enclosure containing said receiver; a conductive collar shield surrounding said receiver cylindrical housing and said optical to electrical converter; a shield extension disposed between said cylindrical housing and said collar shield.
Claim 16
Dependent Claim
77 words
An optical receiver comprising: a receiver having an optical to electrical converter with an optical input and an electrical output, said optical input coupling optical energy from a cylindrical housing having an aperture for receiving a mating optical ferrule to said optical to electrical converter; an enclosure containing said receiver; a conductive collar shield surrounding said receiver cylindrical housing and said optical to electrical converter; a shield extension disposed between said cylindrical housing and said collar shield.
Claim 17
Dependent Claim
28 words
The receiver of claim 13 where said conductive collar shield comprises a continuous foil band having a central axis parallel to the central axis of said cylindrical ferrule.
Claim 18
Dependent Claim
45 words
The receiver of claim 13 where said conductive collar shield comprises said enclosure being made from a material having a bulk resistivity less than 0.2 ohm-cm for frequencies ranging from the fundamental frequency of the communication link through the 7th harmonic of said fundamental frequency.
Claim 19
Dependent Claim
25 words
The receiver of claims 14 or 15 where said shield extension comprises a foil conductor at least as wide as said transmit or receive housing.
Claim 20
Dependent Claim
42 words
The receiver of claim 14 or 15 where said shield extension comprises a conductive material having a bulk resistivity less than 0.2 ohm-cm for frequencies ranging from the fundamental frequency of the communication link through the 7th harmonic of said fundamental frequency.
Claim 21
Dependent Claim
42 words
The receiver of claim 14 or 15 where said shield extension comprises a conductive epoxy having a bulk resistivity less than 0.2 ohm-cm for frequencies ranging from the fundamental frequency of the communication link through the 7th harmonic of said fundamental frequency.
References Cited (Backward Citations)
US4217031A
Cited
US4384165A
Cited
US4724315A
Cited
US4890199A
Cited
US5011246A
Cited
US5082338A
Cited
US4979787A
Cited
US5053924A
Cited
US5067232A
Cited
US5113466A
Cited
US5155786A
Cited
US5371819A
Cited
US5309542A
Cited
US5335147A
Cited
US5337396A
Cited
US5448676A
Cited
US5511798A
Cited
US5606182A
Cited
US5841562A
Cited
US6040934A
Cited
US6061493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-04-01 | 2005-10-01 | 2006-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-04-01 | 2009-10-01 | 2010-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-04-01 | 2013-10-01 | 2014-04-02 | $7700.00 | Window Closed / Lapsed |