GB984144A - Improvements in or relating to luneberg lens reflectors for electromagnetic waves - Google Patents
Improvements in or relating to luneberg lens reflectors for electromagnetic wavesInfo
- Publication number
- GB984144A GB984144A GB48282/62A GB4828262A GB984144A GB 984144 A GB984144 A GB 984144A GB 48282/62 A GB48282/62 A GB 48282/62A GB 4828262 A GB4828262 A GB 4828262A GB 984144 A GB984144 A GB 984144A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- circularly polarized
- polarized wave
- luneberg lens
- distance
- 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
- 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
- H01Q15/23—Combinations of reflecting surfaces with refracting or diffracting devices
Abstract
984,144. Aerials. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. Dec. 21, 9621 [Dec. 22, 1961], No. 48282/62. Heading H4A. A Luneberg lens 1 having an outer reflective surface 8 is known to reverse the direction of polarization of a circularly polarized wave impinging thereon and since raindrops and clouds produce a similar effect it is also known to suppress such "reversed echoes " in radar apparatus, thus rendering a Luneberg lens ineffective as a target. According to the invention this " reversal " is prevented by means of an additional reflector disposed within the lens, this reflector comprising a plurality of parallel wires spaced apart by a distance of less than #/2 and dis- posed parallel to the reflective surface 8 of the lens 1 and at a distance therefrom of n#/8 or n#/4 where n is any odd integer. Thus in the case where the distance is n#/8 (and preferably where n=1) an incident circularly polarized wave is reflected as a linearly polarized wave and in the case of n# 4 (and preferably where n=1) the directions of rotation of the incident and reflected circularly polarized waves are the same.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET21317A DE1238970B (en) | 1961-12-22 | 1961-12-22 | Luneberg lens reflector for radar waves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB984144A true GB984144A (en) | 1965-02-24 |
Family
ID=7550056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB48282/62A Expired GB984144A (en) | 1961-12-22 | 1962-12-21 | Improvements in or relating to luneberg lens reflectors for electromagnetic waves |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1238970B (en) |
| GB (1) | GB984144A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2432776A1 (en) * | 1978-08-04 | 1980-02-29 | Lignes Telegraph Telephon | PASSIVE REFLECTOR FOR CIRCULARLY POLARIZED WAVE WITH LARGE ANGULAR OPENING |
| CN103036062A (en) * | 2011-09-29 | 2013-04-10 | 深圳光启高等理工研究院 | Luneberg reflector |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1015869B (en) * | 1956-01-16 | 1957-09-19 | Iapatelholdia Patentverwertung | Directional antenna |
| US2866971A (en) * | 1956-09-05 | 1958-12-30 | Kenneth S Kelleher | Radiant energy reflector |
-
1961
- 1961-12-22 DE DET21317A patent/DE1238970B/en active Pending
-
1962
- 1962-12-21 GB GB48282/62A patent/GB984144A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2432776A1 (en) * | 1978-08-04 | 1980-02-29 | Lignes Telegraph Telephon | PASSIVE REFLECTOR FOR CIRCULARLY POLARIZED WAVE WITH LARGE ANGULAR OPENING |
| CN103036062A (en) * | 2011-09-29 | 2013-04-10 | 深圳光启高等理工研究院 | Luneberg reflector |
| CN103036062B (en) * | 2011-09-29 | 2016-08-03 | 深圳光启高等理工研究院 | A kind of Luneberg reflector |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1238970B (en) | 1967-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1236629A (en) | Bi-directional electronically scanned antenna system | |
| US2990544A (en) | Radar antenna system providing improved resolution | |
| GB984144A (en) | Improvements in or relating to luneberg lens reflectors for electromagnetic waves | |
| US3688311A (en) | Parabolic antennas | |
| GB1270806A (en) | Improvements relating to aerial arrangements | |
| FR2257095A1 (en) | Vehicle collision avoidance device - with flat plate inclined grid polariser is used as a passive reflector | |
| US2570197A (en) | Dual purpose antenna | |
| US2653239A (en) | Antenna | |
| GB1342892A (en) | Aircraft antennas | |
| US2028510A (en) | Transmitter for electromagnetic waves | |
| GB1366259A (en) | Wide-band electromagnetic wave reflectors | |
| US2553166A (en) | Multicellular microwave lens | |
| GB1272878A (en) | Improvements in or relating to coaxial cables | |
| US3363252A (en) | Cross-polarization suppression for antenna feed by use of external vane | |
| SU395937A1 (en) | THE DEVICE OF FASTENING OF THE TENDER OR CONTRACTOR OF THE ANTENNA MIRROR | |
| GB990032A (en) | Omnidirectional beacon antenna | |
| GB1123951A (en) | Improved two reflector antenna | |
| US3287731A (en) | Logarithmic periodic antenna having gradient, relative to ground plane, varying along length of antenna | |
| GB700868A (en) | Improvements in or relating to high frequency radio aerials | |
| GB767531A (en) | Improvements in or relating to polarised radio mirrors | |
| US2654083A (en) | Radar equipment | |
| SU146362A1 (en) | Transmission line consisting of a mirror system | |
| SU1427451A1 (en) | Aerial system | |
| GB1029791A (en) | Device for determining the relative position of two objects | |
| SU65842A3 (en) | Shortwave Antenna |