Patent EP0671180A1 successfully refreshed from Google Patents.
US3675128A
Expired / Lapsed
US
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Microwave repeater
Assignee: GEN APPLIED SCIENCE LAB Inc
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Filing: 1970-07-30
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Granted: 1972-07-04
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Expires: 1990-07-30
Abstract
Abstract A repeater for a stationary waveguide in a system for communicating between the waveguide and a moving vehicle such as a train. The stationary waveguide structure includes an inverted channel-shaped shield with a semi-cylindrical dielectric rod which acts as the waveguide. The shield protects the waveguide from ice, rain, birds and foreign objects, without itself interferring with the transmission of microwave energy through the waveguide. A coupler or antenna is attached to the moving vehicle and moves along underneath the stationary waveguide structure to couple signals between the vehicle and the stationary waveguide. The repeater comprises two short auxiliary sections of waveguides which are mounted parallel to the stationary waveguide, and a microwave amplifier. The first auxiliary waveguide removes a small portion of the signal flowing in the main waveguide and conducts that signal to the amplifier. The amplifier amplifies the signal and delivers it to the second waveguide which couples the energy back to the main waveguide in amplified form. By means of this repeater, the energy in the main waveguide is amplified substantially without interrupting the signal received by or transmitted by the moving vehicle.
Inventors
- 👤 Manlio G Abele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:12
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/32; H01Q1/3208; H01Q1/3225
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
72 words
In a microwave transmission system including a first elongated waveguide, a repeater comprising second and third waveguides positioned in coupling relationship to said first waveguide, and means for receiving microwave signals from said second waveguids, amplifying said signals, and delivering the amplified signals to said third waveguide for coupling to said first waveguide, said second waveguide being adapted to receive a relatively small portion of the energy transmitted through said first waveguide.
Claim 2
Dependent Claim
72 words
In a microwave transmission system including a first elongated waveguide, a repeater comprising second and third waveguides positioned in coupling relationship to said first waveguide, and means for receiving microwave signals from said second waveguids, amplifying said signals, and delivering the amplified signals to said third waveguide for coupling to said first waveguide, said second waveguide being adapted to receive a relatively small portion of the energy transmitted through said first waveguide.
Claim 3
Dependent Claim
28 words
A repeater as in claim 1 in which said first waveguide receives from said third waveguide a relatively large portion of the energy transmitted through said third waveguide.
Claim 4
Dependent Claim
29 words
A repeater as in claim 1 in which said waveguides each comprise a semicylindrical rod of dielectric material and a conductive shield on the flat portion of the rod.
Claim 5
Dependent Claim
108 words
A first stationary elongated microwave waveguide structure having a conductive shield covering the upper surface of a semi-cylindrical dielectric rod, a repeater comprising second and third relatively short waveguide structures, each having a conductive shield covering the upper surface of a semi-cylindrical dielectric rod, and an amplifier, said second and third waveguide rods being mounted parallel and closely adjacent to said first waveguide rod at different longitudinal positions, with the shields of the various waveguide structures being joined together, said amplifier being connected to receive energy from said second waveguide, amplify said energy, and deliver the amplified energy to the third waveguide for coupling into the first waveguide.
Claim 6
Dependent Claim
108 words
A first stationary elongated microwave waveguide structure having a conductive shield covering the upper surface of a semi-cylindrical dielectric rod, a repeater comprising second and third relatively short waveguide structures, each having a conductive shield covering the upper surface of a semi-cylindrical dielectric rod, and an amplifier, said second and third waveguide rods being mounted parallel and closely adjacent to said first waveguide rod at different longitudinal positions, with the shields of the various waveguide structures being joined together, said amplifier being connected to receive energy from said second waveguide, amplify said energy, and deliver the amplified energy to the third waveguide for coupling into the first waveguide.
Claim 7
Dependent Claim
53 words
Apparatus as in claim 4 in which said second waveguide rod has a length such that it extracts only a relatively small portion of the energy from the first waveguide, and said third rod has a different length such that there is substantially full coupling of energy between said third and first waveguides.
Claim 8
Dependent Claim
43 words
Apparatus as in claim 4 including an absorber at the leading end of said second waveguide to absorb reflected waves, and another absorber at the trailing end of said third waveguide to absorb signals received in said third waveguide from said first waveguide.
Claim 9
Dependent Claim
30 words
Apparatus as in claim 4 including, on each of the shields of said second and third waveguides, an auxiliary shield extending downwardly and for a distance beneath the waveguide structure.
Claim 10
Independent Claim
111 words
A system for communication between a stationary waveguide and a moving body, said system comprising a first long stationary waveguide adjacent the path for the moving body, waveguide coupling means on said body, located at a distance from said first stationary waveguide, for receiving signals from said first waveguide, a repeater comprising second and third waveguides positioned in coupling relationship to said first waveguide, and means for receiving microwave signals from said second waveguide, amplifying said signals, and delivering the amplified signals to said third waveguide for coupling to said first waveguide, said second waveguide being adapted to receive a relatively small portion of the energy transmitted through said first waveguide.
Claim 11
Independent Claim
111 words
A system for communication between a stationary waveguide and a moving body, said system comprising a first long stationary waveguide adjacent the path for the moving body, waveguide coupling means on said body, located at a distance from said first stationary waveguide, for receiving signals from said first waveguide, a repeater comprising second and third waveguides positioned in coupling relationship to said first waveguide, and means for receiving microwave signals from said second waveguide, amplifying said signals, and delivering the amplified signals to said third waveguide for coupling to said first waveguide, said second waveguide being adapted to receive a relatively small portion of the energy transmitted through said first waveguide.
Claim 12
Dependent Claim
28 words
A system as in claim 8 in which said first waveguide receives from said third waveguide a relatively large portion of the energy transmitted through said third waveguide.
Claim 13
Dependent Claim
29 words
A system as in claim 8 in which said waveguides each comprise a semi-cylindrical rod of dielectric material and a conductive shield on the flat portion of the rod.
Claim 14
Dependent Claim
28 words
A system as in claim 10 in which said shields are flat and horizontal and are joined together edge-to-edge to form a protective roof over the waveguide rods.
Claim 15
Dependent Claim
17 words
A system as in claim 10 including support posts attached to the shield of the first waveguide.
Claim 16
Dependent Claim
54 words
A system as in claim 8 in which said second waveguide rod has a length such that it extracts only a relatively small portion of the energy from the first waveguide, and said third rod has a different length such that there is substantially full coupling of energy between said third and first waveguides.
Claim 17
Dependent Claim
44 words
A system as in claim 8 including an absorber at the leading end of said second waveguide to absorb reflected waves, and another absorber at the trailing end of said third waveguide to absorb signals received in said third waveguide from said first waveguide.
Claim 18
Dependent Claim
75 words
In a microwave transmission system including a first elongated waveguide, a repeater comprising second and third waveguides positioned in coupling relationship to said first waveguide, said second and third waveguides being everywhere spaced from said first waveguide and parallel to said first waveguide over a substantial length, and means for receiving microwave signals from said second waveguide, amplifying said signals, and delivering the amplified signals to said third waveguide for coupling to said first waveguide.
Claim 19
Dependent Claim
75 words
In a microwave transmission system including a first elongated waveguide, a repeater comprising second and third waveguides positioned in coupling relationship to said first waveguide, said second and third waveguides being everywhere spaced from said first waveguide and parallel to said first waveguide over a substantial length, and means for receiving microwave signals from said second waveguide, amplifying said signals, and delivering the amplified signals to said third waveguide for coupling to said first waveguide.
Claim 20
Dependent Claim
27 words
A repeater as in claim 15 in which said second waveguide is adapted to receive a relative small portion of the energy transmitted through said first waveguide.
Claim 21
Dependent Claim
29 words
A repeater as in claim 15 in which said waveguides each comprise a semicylindrical rod of dielectric material and a conductive shield on the flat portion of the rod.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |