NL272152A - - Google Patents
Info
- Publication number
- NL272152A NL272152A NL272152DA NL272152A NL 272152 A NL272152 A NL 272152A NL 272152D A NL272152D A NL 272152DA NL 272152 A NL272152 A NL 272152A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/02—Details
- H01Q19/021—Means for reducing undesirable effects
- H01Q19/027—Means for reducing undesirable effects for compensating or reducing aperture blockage
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/19—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
- H01Q19/191—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface wherein the primary active element uses one or more deflecting surfaces, e.g. beam waveguide feeds
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/19—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
- H01Q19/195—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface wherein a reflecting surface acts also as a polarisation filter or a polarising device
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US78364A US3195137A (en) | 1960-12-27 | 1960-12-27 | Cassegrainian antenna with aperture blocking correction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL272152A true NL272152A (fi) |
Family
ID=22143578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL272152D NL272152A (fi) | 1960-12-27 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3195137A (fi) |
| DE (2) | DE1225716B (fi) |
| GB (2) | GB1006218A (fi) |
| NL (1) | NL272152A (fi) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3271771A (en) * | 1962-02-15 | 1966-09-06 | Hazeltine Research Inc | Double-reflector, double-feed antenna for crossed polarizations and polarization changing devices useful therein |
| US3281850A (en) * | 1962-03-07 | 1966-10-25 | Hazeltine Research Inc | Double-feed antennas operating with waves of two frequencies of the same polarization |
| FR1419597A (fr) * | 1964-03-20 | 1965-12-03 | Thomson Houston Comp Francaise | Perfectionnements aux antennes pour ondes ultra-courtes |
| US3340535A (en) * | 1964-06-16 | 1967-09-05 | Textron Inc | Circular polarization cassegrain antenna |
| US3510873A (en) * | 1965-10-18 | 1970-05-05 | Comelit Comp Elettro It | Horn-reflector antenna |
| FR1477571A (fr) * | 1966-02-25 | 1967-04-21 | Csf | Perfectionnements aux antennes à dispositif de focalisation |
| US3414904A (en) * | 1966-05-16 | 1968-12-03 | Hughes Aircraft Co | Multiple reflector antenna |
| US3500419A (en) * | 1966-09-09 | 1970-03-10 | Technical Appliance Corp | Dual frequency,dual polarized cassegrain antenna |
| FR1569747A (fi) * | 1968-03-12 | 1969-06-06 | ||
| US3953858A (en) * | 1975-05-30 | 1976-04-27 | Bell Telephone Laboratories, Incorporated | Multiple beam microwave apparatus |
| DE2628713A1 (de) * | 1976-06-25 | 1977-12-29 | Siemens Ag | Rotationssymmetrische zweispiegelantenne |
| DE2947987C2 (de) * | 1979-11-28 | 1982-03-04 | Siemens AG, 1000 Berlin und 8000 München | Cassegrain-Antenne |
| US4977407A (en) * | 1981-07-23 | 1990-12-11 | Crane Patrick E | Optical collimator |
| US4692141A (en) | 1982-03-08 | 1987-09-08 | Mahurkar Sakharam D | Double lumen catheter |
| US4568329A (en) * | 1982-03-08 | 1986-02-04 | Mahurkar Sakharam D | Double lumen catheter |
| US4583968A (en) * | 1983-10-03 | 1986-04-22 | Mahurkar Sakharam D | Smooth bore double lumen catheter |
| US5197951A (en) | 1983-12-14 | 1993-03-30 | Mahurkar Sakharam D | Simple double lumen catheter |
| US4623327A (en) * | 1985-02-12 | 1986-11-18 | Mahurkar Sakharam D | Method and apparatus for using dual-lumen catheters for extracorporeal treatment |
| US4770652A (en) * | 1985-02-12 | 1988-09-13 | Mahurkar Sakharam D | Method and apparatus for using dual-lumen catheters for extracorporeal treatment |
| US4689632A (en) * | 1985-05-30 | 1987-08-25 | Rca Corporation | Reflector antenna system having reduced blockage effects |
| US5003321A (en) * | 1985-09-09 | 1991-03-26 | Sts Enterprises, Inc. | Dual frequency feed |
| US4808155A (en) | 1986-02-27 | 1989-02-28 | Mahurkar Sakharam D | Simple double lumen catheter |
| GB2234858A (en) * | 1988-09-02 | 1991-02-13 | Thorn Emi Electronics Ltd | Cassegrain antenna |
| US5221255A (en) | 1990-01-10 | 1993-06-22 | Mahurkar Sakharam D | Reinforced multiple lumen catheter |
| US5374245A (en) | 1990-01-10 | 1994-12-20 | Mahurkar; Sakharam D. | Reinforced multiple-lumen catheter and apparatus and method for making the same |
| US5690642A (en) | 1996-01-18 | 1997-11-25 | Cook Incorporated | Rapid exchange stent delivery balloon catheter |
| US10879619B2 (en) | 2009-06-04 | 2020-12-29 | Ubiquiti Inc. | Microwave system |
| CN113659346B (zh) * | 2021-07-30 | 2023-11-21 | 中国航空工业集团公司济南特种结构研究所 | 一种天线罩电厚度测试天线及使用方法 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2032588A (en) * | 1931-09-12 | 1936-03-03 | Jr Herman Potts Miller | Communication and detection system |
| FR898352A (fr) * | 1942-06-24 | 1945-04-20 | Telefunken Gmbh | Perfectionnements aux systèmes de production simultanée ou alternative de deux rayonnements dirigés |
| FR911045A (fr) * | 1943-09-28 | 1946-06-26 | Color Metal A G | Réflecteurs cylindriques produisant un faisceau lumineux en forme de coin |
| US2736895A (en) * | 1951-02-16 | 1956-02-28 | Elliott Brothers London Ltd | High frequency radio aerials |
| US2741744A (en) * | 1951-05-08 | 1956-04-10 | Driscoll Clare | Microwave apparatus for circular polarization |
| US2825032A (en) * | 1953-03-10 | 1958-02-25 | Alford Andrew | Wave guide mode transformer |
| US2952017A (en) * | 1956-02-23 | 1960-09-06 | Decca Record Co Ltd | Waveguide type radar apparatus having polarization converter |
| DE1075682B (de) * | 1956-09-11 | 1960-02-18 | Fabbnca Italiana Magneti Marelli Mailand (Italien) | An tennenanordnung insbesondere fur Funk fernsprechverbmdungen zwischen zwei Stationen |
| US2972743A (en) * | 1957-06-19 | 1961-02-21 | Westinghouse Electric Corp | Combined infrared-radar antenna |
| FR1213871A (fr) * | 1958-10-31 | 1960-04-05 | Thomson Houston Comp Francaise | Perfectionnements aux antennes fonctionnant en hyperfréquences |
| US3089137A (en) * | 1959-07-01 | 1963-05-07 | Bell Telephone Labor Inc | Polarization tracking receiver |
-
0
- NL NL272152D patent/NL272152A/xx unknown
-
1960
- 1960-12-27 US US78364A patent/US3195137A/en not_active Expired - Lifetime
-
1961
- 1961-12-07 GB GB43805/61A patent/GB1006218A/en not_active Expired
- 1961-12-07 GB GB22007/65A patent/GB1006219A/en not_active Expired
- 1961-12-09 DE DEW31245A patent/DE1225716B/de active Pending
- 1961-12-09 DE DEW39552A patent/DE1257227B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3195137A (en) | 1965-07-13 |
| DE1225716B (de) | 1966-09-29 |
| GB1006218A (en) | 1965-09-29 |
| GB1006219A (en) | 1965-09-29 |
| DE1257227B (de) | 1967-12-28 |