Patent EP0298701A2 successfully refreshed from Google Patents.
Patent US5694556A successfully refreshed from Google Patents.
Patent US3768042A successfully refreshed from Google Patents.
US3768042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric cavity stripline coupler
Assignee: Motorola Solutions Inc
•
Filing: 1972-06-07
•
Granted: 1973-10-23
•
Expires: 1992-06-07
Abstract
Abstract A three section stripline coupler is disclosed wherein the conducting strips of the center section overlie each other and those of the end sections are displaced sideways relative to each other. Cavities are formed in the ground planes of the stripline over the center section and the cavities are filled with dielectric material to increase the coupling between the conducting strips at the center section.
Inventors
- 👤 L Friend
- 👤 T Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:03
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/18; H01P5/184; H01P5/187
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
261 words
A TEM mode directional coupler for a predetermined frequency range comprising: a first dielectric layer of predetermined thickness, a first strip conductor disposed on one side of said first dielectric layer and having a central and two end coupling sections each of which is substantially one-quarter wave length long at a predetermined frequency, a second strip conductor disposed on the other side of said first dielectric layer and having a central and two end coupling sections each of which is substantially one-quarter wave length long at said predetermined frequency, the central coupling sections of said first and said second strip conductors being in overlying coupling relationship, one end coupling section of each of said first and said second strip conductors being disposed along side each and being in edge coupling relationship, the other end coupling section of each of said first and said second strip conductors being disposed along side each other and being in edge coupling relationship, a second dielectric layer of predetermined thickness disposed against said first strip conductor, a third dielectric layer of predetermined thickness disposed against said second strip conductor, a first metallic ground plane disposed against said second dielecTric layer, a second metallic ground plane disposed against said third dielectric layer, and means for increasing the coupling between said central coupling sections of said first and said second strip conductors, said coupling increasing means comprising cavity means of predetermined depth and length formed in one of said first and said second ground planes adjacent said central coupling sections of said first and said second strip conductors.
Claim 2
Dependent Claim
261 words
A TEM mode directional coupler for a predetermined frequency range comprising: a first dielectric layer of predetermined thickness, a first strip conductor disposed on one side of said first dielectric layer and having a central and two end coupling sections each of which is substantially one-quarter wave length long at a predetermined frequency, a second strip conductor disposed on the other side of said first dielectric layer and having a central and two end coupling sections each of which is substantially one-quarter wave length long at said predetermined frequency, the central coupling sections of said first and said second strip conductors being in overlying coupling relationship, one end coupling section of each of said first and said second strip conductors being disposed along side each and being in edge coupling relationship, the other end coupling section of each of said first and said second strip conductors being disposed along side each other and being in edge coupling relationship, a second dielectric layer of predetermined thickness disposed against said first strip conductor, a third dielectric layer of predetermined thickness disposed against said second strip conductor, a first metallic ground plane disposed against said second dielecTric layer, a second metallic ground plane disposed against said third dielectric layer, and means for increasing the coupling between said central coupling sections of said first and said second strip conductors, said coupling increasing means comprising cavity means of predetermined depth and length formed in one of said first and said second ground planes adjacent said central coupling sections of said first and said second strip conductors.
Claim 3
Dependent Claim
61 words
The directional coupler according to claim 1 wherein said cavity means comprises a first cavity of predetermined depth and length formed in said first ground plane adjacent the central coupling section of said first strip conductor, and a second cavity of predetermined depth and length formed in said second ground plane adjacent the central coupling section of said second strip conductor.
Claim 4
Dependent Claim
35 words
The directional coupler according to claim 2 wherein the length of each of said cavities is substantially equal to the length of one of said central coupling sections of said first and second conducting strips.
Claim 5
Dependent Claim
20 words
The directional coupler according to claim 2 wherein each of said first and second cavities is filled with dielectric material.
Claim 6
Dependent Claim
33 words
The directional coupler according to claim 2 wherein the lengths of said first and second cavities is equal to one-quarter of a wave length at the center frequency of the predetermined frequency range.
References Cited (Backward Citations)
US3113277A
Cited
US3063026A
Cited
US3121848A
Cited
US3221275A
Cited
US3363201A
Cited
US3460069A
Cited
US3478281A
Cited
US3617952A
Cited
US3626332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |