US3732508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip line to waveguide transition
Assignee: Fujitsu Ltd
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Filing: 1971-12-16
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Granted: 1973-05-08
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Expires: 1991-12-16
Abstract
Abstract Apparatus is disclosed for coupling a wave transmitted between a waveguide and a strip line. In particular, the strip line is composed of a conductor, a dielectric substrate and an earth (or ground) conductor. In accordance with teachings of this invention the coupling is achieved by inserting a slot mode between the strip propagation mode and the waveguide mode in a strip line to waveguide transition. More specifically, a slot is formed in the earth conductor of the strip line and the slot is disposed to intersect or to traverse the strip line conductor to achieve the desired coupling.
Inventors
- 👤 Y Ito
- 👤 H Komizo
- 👤 T Okamura
- 👤 Y Simizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:38
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01P5/10; H01P5/107
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
184 words
A strip line to waveguide transition comprising: a. a hollow waveguide for propagating electromagnetic waves in a waveguide mode along the axis of said waveguide; b. a strip line for propagating electromagnetic waves in a strip line mode therealong and comprising a first conductive element, a second earth, conductive plate and a dielectric substrate disposed therebetween; and c. a slot line for coupling the electromagnetic waves between said waveguide and said strip line, said slot line being formed within said conductive plate of said strip line substantially parallel to said axis of said waveguide, said conductive plate being disposed substantially parallel to the direction of the electric field of said electromagnetic waves propagated by said waveguide whereby the electric and magnetic fields of the electromagnetic wave propagated by said waveguide are aligned with the electric and magnetic fields of the electromagnetic wave propagated by said slot line, said first conductive element of said strip line disposed substantially orthogonal to said slot line whereby the electric and magnetic fields of the electromagnetic waves propagated by said strip line are smoothly coupled with said slot line.
Claim 2
Dependent Claim
184 words
A strip line to waveguide transition comprising: a. a hollow waveguide for propagating electromagnetic waves in a waveguide mode along the axis of said waveguide; b. a strip line for propagating electromagnetic waves in a strip line mode therealong and comprising a first conductive element, a second earth, conductive plate and a dielectric substrate disposed therebetween; and c. a slot line for coupling the electromagnetic waves between said waveguide and said strip line, said slot line being formed within said conductive plate of said strip line substantially parallel to said axis of said waveguide, said conductive plate being disposed substantially parallel to the direction of the electric field of said electromagnetic waves propagated by said waveguide whereby the electric and magnetic fields of the electromagnetic wave propagated by said waveguide are aligned with the electric and magnetic fields of the electromagnetic wave propagated by said slot line, said first conductive element of said strip line disposed substantially orthogonal to said slot line whereby the electric and magnetic fields of the electromagnetic waves propagated by said strip line are smoothly coupled with said slot line.
Claim 3
Dependent Claim
30 words
Apparatus as claimed in claim 1, wherein said slot comprises at least one edge surface, said edge surface being configured in a curve directed toward a wall of said waveguide.
Claim 4
Dependent Claim
32 words
Apparatus as claimed in claim 1, wherein said slot forms first and second portions of said earth conductor, said first portion extending a greater distance along said waveguide than said second portion.
Claim 5
Dependent Claim
44 words
Apparatus as claimed in claim 1, wherein said dielectric member has an end surface disposed at an acute angle with respect to a wall of said waveguide, said first conductor having an end portion aligned in a substantially parallel relationship with said end surface.
Claim 6
Dependent Claim
25 words
Apparatus as claimed in claim 1, wherein said strip line has an end portion shaped as a question mark to orthogonally traverse said slot line.
Claim 7
Dependent Claim
43 words
Apparatus as claimed in claim 1, wherein said conductive plate has an edge portion and said slot line is formed within said conductive plate of said strip line, having opposed surfaces curved away from each other as said surfaces approach said edge portion.
Claim 8
Dependent Claim
16 words
Apparatus as claimed in claim 1, wherein said waveguide has a cross-section of a circular configuration.
Claim 9
Dependent Claim
16 words
Apparatus as claimed in claim 1, wherein said waveguide has a cross-section of a rectangular configuration.
Claim 10
Dependent Claim
30 words
Apparatus as claimed in claim 1, wherein a conductive member is disposed between the periphery of said waveguide and said conductive plate for supporting said strip line within said waveguide.
Claim 11
Dependent Claim
23 words
Apparatus as claimed in claim 9, wherein said support member includes a portion of reduced width disposed upon the periphery of said waveguide.
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |