NL138294C - - Google Patents
Info
- Publication number
- NL138294C NL138294C NL138294DA NL138294C NL 138294 C NL138294 C NL 138294C NL 138294D A NL138294D A NL 138294DA NL 138294 C NL138294 C NL 138294C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/12—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems
- H01Q3/14—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying the relative position of primary active element and a refracting or diffracting device
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US722440A US2611870A (en) | 1947-01-16 | 1947-01-16 | Directive antenna system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL138294C true NL138294C (uk) |
Family
ID=24901844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL138294D NL138294C (uk) | 1947-01-16 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2611870A (uk) |
| BE (1) | BE479578A (uk) |
| CH (1) | CH280689A (uk) |
| ES (1) | ES182081A1 (uk) |
| FR (1) | FR967358A (uk) |
| GB (1) | GB660788A (uk) |
| NL (1) | NL138294C (uk) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2795783A (en) * | 1953-08-19 | 1957-06-11 | Allen S Dunbar | Microwave lens antenna |
| US2945228A (en) * | 1953-08-21 | 1960-07-12 | Marconi Wireless Telegraph Co | Antenna having two focusing elements |
| BE558882A (uk) * | 1955-01-04 | |||
| CN101304122B (zh) * | 2008-07-02 | 2011-06-15 | 南京大学 | 线源定向辐射增强装置 |
| CN111541028A (zh) * | 2020-05-14 | 2020-08-14 | 北京高信达通信科技股份有限公司 | 一种有源天线和制造方法 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2075808A (en) * | 1930-11-21 | 1937-04-06 | Robert A Fliess | Method and apparatus for observing bodies through opaque substances |
| US1904901A (en) * | 1931-04-04 | 1933-04-18 | Harry W Lawrence | Electric light fixture |
| US2231929A (en) * | 1937-04-29 | 1941-02-18 | Sperry Gyroscope Co Inc | Tridimensional radio direction indicator |
| US2288177A (en) * | 1938-11-03 | 1942-06-30 | James M Bailey | Floodlight |
| NL60724C (uk) * | 1939-06-24 | |||
| US2460401A (en) * | 1941-11-28 | 1949-02-01 | Bell Telephone Labor Inc | Directive microwave radio antenna |
| US2354665A (en) * | 1942-06-22 | 1944-08-01 | Joseph H Church | Method for protecting against attacking aircraft |
| US2442951A (en) * | 1944-05-27 | 1948-06-08 | Rca Corp | System for focusing and for directing radio-frequency energy |
-
0
- BE BE479578D patent/BE479578A/xx unknown
- NL NL138294D patent/NL138294C/xx active
-
1947
- 1947-01-16 US US722440A patent/US2611870A/en not_active Expired - Lifetime
-
1948
- 1948-01-13 CH CH280689D patent/CH280689A/fr unknown
- 1948-01-16 GB GB1368/48A patent/GB660788A/en not_active Expired
- 1948-01-16 FR FR967358D patent/FR967358A/fr not_active Expired
- 1948-02-05 ES ES0182081A patent/ES182081A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR967358A (fr) | 1950-11-02 |
| BE479578A (uk) | |
| GB660788A (en) | 1951-11-14 |
| CH280689A (fr) | 1952-01-31 |
| ES182081A1 (es) | 1948-03-16 |
| US2611870A (en) | 1952-09-23 |