GB1275988A - Improvements in or relating to electromagnetic wave nonreciprocal devices - Google Patents
Improvements in or relating to electromagnetic wave nonreciprocal devicesInfo
- Publication number
- GB1275988A GB1275988A GB56380/69A GB5638069A GB1275988A GB 1275988 A GB1275988 A GB 1275988A GB 56380/69 A GB56380/69 A GB 56380/69A GB 5638069 A GB5638069 A GB 5638069A GB 1275988 A GB1275988 A GB 1275988A
- Authority
- GB
- United Kingdom
- Prior art keywords
- field
- ferrite
- bounded
- channel
- centre conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/32—Non-reciprocal transmission devices
- H01P1/36—Isolators
- H01P1/365—Resonance absorption isolators
Landscapes
- Waveguide Aerials (AREA)
- Non-Reversible Transmitting Devices (AREA)
Abstract
1275988 Isolators WESTERN ELECTRIC CO Inc 18 Nov 1969 [22 Nov 1968] 56380/69 Heading H1W An isolator for given frequency microwaves employing the properties of a gyromagnetic material, preferably ferrite 16, 17, which fills a conductively bounded channel or wave-guide, has applied a steady magnetic field H DC with a field gradient across the channel such that the field strength varies from a value less than to a value greater than the field producing gyromagnetic resonance for the material, and the microwaves are applied with their electric vector transverse to the field gradient. The field H DC is stated to distort the magnetic field of the microwave within the ferrite such that the longitudinal and transverse components are equal in amplitude in a relatively broad region that substantially coincides with the region of resonance. In combination with a microwave strip line an isolator channel may be disposed between the centre conductor and one or each ground plane and as in Fig. 1 the ferrite is bounded by the ground planes 10 and 11 and by side partitions 13 and 14 and is divided by a conductive central divider 15 connected to the centre conductor 12 of the strip line. Capacitative stubs 18, 19 are provided to improve the impedance match. In further embodiments the ferrite is bounded by a conductive foil and may be coupled to the centre conductor 12 by a dielectric material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US77814868A | 1968-11-22 | 1968-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1275988A true GB1275988A (en) | 1972-06-01 |
Family
ID=25112443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB56380/69A Expired GB1275988A (en) | 1968-11-22 | 1969-11-18 | Improvements in or relating to electromagnetic wave nonreciprocal devices |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3534299A (en) |
| BE (1) | BE739194A (en) |
| DE (1) | DE1957866A1 (en) |
| FR (1) | FR2023841A1 (en) |
| GB (1) | GB1275988A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4947713B1 (en) * | 1970-04-27 | 1974-12-17 | ||
| US3671888A (en) * | 1970-12-07 | 1972-06-20 | Hewlett Packard Co | Wide band stop band filter including a ferrite region biased by a graded magnetic field |
| US4050038A (en) * | 1974-09-04 | 1977-09-20 | Nippon Electric Company, Ltd. | Edge-guided mode non-reciprocal circuit element for microwave energy |
| US4609888A (en) * | 1980-10-02 | 1986-09-02 | The United States Of America As Represented By The Secretary Of The Navy | Direction finding antenna interface |
| US4845439A (en) * | 1988-03-18 | 1989-07-04 | Westinghouse Electric Corp. | Frequency selective limiting device |
| FR2647599B1 (en) * | 1989-05-24 | 1991-11-29 | Alcatel Espace | CIRCUIT REALIZATION STRUCTURE AND COMPONENTS APPLIED TO MICROWAVE |
| US5525953A (en) * | 1993-04-28 | 1996-06-11 | Murata Manufacturing Co., Ltd. | Multi-plate type high frequency parallel strip-line cable comprising circuit device part integratedly formed in dielectric body of the cable |
| US6972639B2 (en) * | 2003-12-08 | 2005-12-06 | Werlatone, Inc. | Bi-level coupler |
| US7245192B2 (en) * | 2003-12-08 | 2007-07-17 | Werlatone, Inc. | Coupler with edge and broadside coupled sections |
| US7119633B2 (en) * | 2004-08-24 | 2006-10-10 | Endwave Corporation | Compensated interdigitated coupler |
| JP4729464B2 (en) * | 2006-09-20 | 2011-07-20 | ルネサスエレクトロニクス株式会社 | Directional coupler and high-frequency circuit module |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3095546A (en) * | 1956-03-01 | 1963-06-25 | Sylvania Electric Prod | Gyromagnetic isolator using a nonuniform magnetic bias |
| US3426299A (en) * | 1967-06-01 | 1969-02-04 | Us Army | Microwave power limiter comprising abutting semiconductor and ferrite elements |
-
1968
- 1968-11-22 US US778148A patent/US3534299A/en not_active Expired - Lifetime
-
1969
- 1969-09-22 BE BE739194D patent/BE739194A/xx unknown
- 1969-10-10 FR FR6934833A patent/FR2023841A1/fr not_active Withdrawn
- 1969-11-18 GB GB56380/69A patent/GB1275988A/en not_active Expired
- 1969-11-18 DE DE19691957866 patent/DE1957866A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3534299A (en) | 1970-10-13 |
| DE1957866A1 (en) | 1970-06-18 |
| BE739194A (en) | 1970-03-02 |
| FR2023841A1 (en) | 1970-08-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |