Patent US3801936A successfully refreshed from Google Patents.
US3801936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniaturized yig band-pass filter having defined damping poles
Assignee: US Philips Corp
•
Filing: 1972-08-23
•
Granted: 1974-04-02
•
Expires: 1992-08-23
Abstract
Abstract The invention relates to a miniaturized YIG band-pass filter with first poles for achieving high selectivity in the microwave range, in which the coupling structure consists of, for example, crossed coaxial inner conductors in an external magnet circuit which are semicircularly bent over the YIG elements, the coupling structure for the YIG resonators being arranged in a filter body which is made of, for example, copper or brass, such that the coaxial supply conductors for coupling the YIG resonators are adjacently arranged and are magnetically coupled, i.e., in the case of filters comprising an even number of YIG resonators they are coupled to each other, and in the case of filters comprising an odd number of YIG resonators the first and the last supply conductor are coupled. The magnetic coupling between the supply conductors can be varied by means of a displaceable shutter.
Inventors
- 👤 P Roschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:58
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/215; H01P1/218
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
148 words
A miniaturized YIG band-pass filter having defined damping poles comprising: an even number of ferrimagnetic YIG resonators, a filter body of electroconductive non-magnetizable material, a corresponding number of chambers formed in said body for receiving said YIG resonators, respectively, the first and the last chamber being arranged adjacent each other and interconnected by a coupling aperture, two parallel passages leading from said first and last chambers respectively, to an external surface of said body, an input and output coupling structure including coaxial supply conductors passing through said passages and being magnetically coupled to one side of said YIG elements, a crossed inner conductor passing through said coupling aperture and being magnetically coupled to another side of said YIG elements, and an open space formed in said body between predetermined portions of said supply conductor to produce an additional coupling therebetween thereby forming damping poles in the filter curve.
Claim 2
Dependent Claim
148 words
A miniaturized YIG band-pass filter having defined damping poles comprising: an even number of ferrimagnetic YIG resonators, a filter body of electroconductive non-magnetizable material, a corresponding number of chambers formed in said body for receiving said YIG resonators, respectively, the first and the last chamber being arranged adjacent each other and interconnected by a coupling aperture, two parallel passages leading from said first and last chambers respectively, to an external surface of said body, an input and output coupling structure including coaxial supply conductors passing through said passages and being magnetically coupled to one side of said YIG elements, a crossed inner conductor passing through said coupling aperture and being magnetically coupled to another side of said YIG elements, and an open space formed in said body between predetermined portions of said supply conductor to produce an additional coupling therebetween thereby forming damping poles in the filter curve.
Claim 3
Dependent Claim
27 words
A YIG bandpass filter as claimed in claim 1, characterized in that an adjustable magnetic shunt is provided for the external magnetic field for the YIG resonators.
Claim 4
Dependent Claim
25 words
A YIG band-pass filter as claimed in claim 1, characterized in that the external magnetic circuit can be electronically adjusted by means of a coil.
Claim 5
Dependent Claim
29 words
A YIG band-pass filter as claimed in claim 1 characterized in that the open space is an opening in the partition between the passages for the coaxial supply conductors.
Claim 6
Dependent Claim
27 words
A YIG band-pass filter as claimed in claim 4, characterized in that the open space between the supply conductors is adjustable by means of a displaceable shutter.
Claim 7
Dependent Claim
48 words
A band-pass filter according to claim 4, further including an additional chamber with a YIG resonator, and portions of said crossed inner conductor being directed against side opening to introduce coupling between a supply conductOr of one YIG resonator and the inner conductor near the other YIG resonator.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |