Patent US4939484A successfully refreshed from Google Patents.
US4939484A
Expired / Lapsed
US
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Transmission channel coupler for antenna
Assignee: Harada Industry Co Ltd
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Filing: 1989-11-06
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Granted: 1990-07-03
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Expires: 2009-11-06
Abstract
Abstract Inductance coupling type transmission channel couplers mounted on either side of an insulator such as window glass of a vehicle including a pair of resonator, each including a cylindrical outer conductor and a helical conductor coaxially provided in the outer conductor with one end connected thereto. The resonant frequency of the tuning inductance circuit thus constructed is set at 1/3 of an objective frequency, and the ratio between the inner diameter and the outer diameter of the helical conductor is set at 1.1-2.0.
Inventors
- 👤 Takuji Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:24
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/205; H01P5/00; H01P5/12; H01Q; H01Q1/00; H01Q1/12; H01Q1/1271; H01Q1/1285
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
An inductance coupling type transmission channel coupler comprising: a helical conductor; an outer conductor provided outside of said helical conductor, said outer conductor being coaxial with said helical conductor; a means for electrically connecting one end of said helical conductor to an inner wall of said outer conductor; and a conductor fixing means for fixing an other end of said helical conductor within a plane defined by the end surface of said outer conductor; and wherein a ratio between the inner diameter of said outer conductor and the outer diameter of said helical conductor is in the range of 1.1 to 2.0; and said helical conductor and said outer conductor form a helical resonator having a resonant frequency of one third of a frequency of transmission of said transmission channel coupler.
Claim 2
Dependent Claim
131 words
An inductance coupling type transmission channel coupler comprising: a helical conductor; an outer conductor provided outside of said helical conductor, said outer conductor being coaxial with said helical conductor; a means for electrically connecting one end of said helical conductor to an inner wall of said outer conductor; and a conductor fixing means for fixing an other end of said helical conductor within a plane defined by the end surface of said outer conductor; and wherein a ratio between the inner diameter of said outer conductor and the outer diameter of said helical conductor is in the range of 1.1 to 2.0; and said helical conductor and said outer conductor form a helical resonator having a resonant frequency of one third of a frequency of transmission of said transmission channel coupler.
Claim 3
Dependent Claim
104 words
An inductance coupling type transmission channel coupler comprising: a helical condcutor; an outer conductor provided outside of said helical conductor, said outer conductor being coaxial with said helical conductor; a means for electrically connecting one end of said helical conductor to an inner wall of said outer conductor; and a conductor fixing means for fixing an other end of said helical conductor within a plane defined by the end surface of said outer conductor; and wherein said helical conductor and said outer conductor form a helical resonator having a resonant frequency of one third of a frequency of transmission of said transmission channel coupler.
Claim 4
Dependent Claim
104 words
An inductance coupling type transmission channel coupler comprising: a helical condcutor; an outer conductor provided outside of said helical conductor, said outer conductor being coaxial with said helical conductor; a means for electrically connecting one end of said helical conductor to an inner wall of said outer conductor; and a conductor fixing means for fixing an other end of said helical conductor within a plane defined by the end surface of said outer conductor; and wherein said helical conductor and said outer conductor form a helical resonator having a resonant frequency of one third of a frequency of transmission of said transmission channel coupler.
Claim 5
Dependent Claim
89 words
A inductance coupling type transmission channel coupler comprising: a helical conductor; an outer conductor provided outside of said helical conductor and surrounding said helical conductor, said outer conductor being coaxial with said helical conductor and being electrically coupled to said helical conductor; and wherein said helical conductor and said outer conductor form a helical resonator having a resonant frequency of one third of a frequency of transmission of said tansmission channel coupler; whereby a quality factor Q and a coupling coefficient K of said transmission channel coupler is increased.
Claim 6
Dependent Claim
89 words
A inductance coupling type transmission channel coupler comprising: a helical conductor; an outer conductor provided outside of said helical conductor and surrounding said helical conductor, said outer conductor being coaxial with said helical conductor and being electrically coupled to said helical conductor; and wherein said helical conductor and said outer conductor form a helical resonator having a resonant frequency of one third of a frequency of transmission of said tansmission channel coupler; whereby a quality factor Q and a coupling coefficient K of said transmission channel coupler is increased.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-02 | 1994-01-01 | 1994-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-02 | 1998-01-01 | 1998-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-02 | 2002-01-01 | 2002-07-03 | $7700.00 | Window Closed / Lapsed |