GB653018A - Improvements in or relating to aerial systems - Google Patents
Improvements in or relating to aerial systemsInfo
- Publication number
- GB653018A GB653018A GB1284048A GB1284048A GB653018A GB 653018 A GB653018 A GB 653018A GB 1284048 A GB1284048 A GB 1284048A GB 1284048 A GB1284048 A GB 1284048A GB 653018 A GB653018 A GB 653018A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slots
- unipole
- flange
- radiation
- outer 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
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
Landscapes
- Waveguide Aerials (AREA)
Abstract
653,018. Aerials. MINISTER OF SUPPLY. May 10, 1948, No. 12840. [Class 40 (vii)] An aerial system with a polar diagram similar to that of a #/2 dipole in which the radiation emitted in the median plane is circularly polarized comprises a coaxial feeder with a flange 3 extending from the end of the outer conductor 2, the inner conductor 1 extending #/4 beyond the flange and a pair of diametrically opposite axial slots 4 and 5 of length #/4 being formed in the outer conductor, the slots 4 and 5 being continuations of radial slots 6 and 7 also of length #/4 formed in the flange. The slots 4, 5, 6 and. 7 are energized by probes 9 which extend radially inwards from the end of the outer conductor and are covered by a cylindrical dielectric block 8 with a radial dimension d given by d(##-1) = #/4, where # is the dielectric constant. The unipole 1 in conjunction with the flange 3 has a polar diagram similar to that of a #/2 dipole with the electric vector parallel to the unipole and the resultant radiation from the slots 4 and 5 has a similar polar diagram with the electric vector perpendicular to the unipole and since the dielectric mass 8 retards the phase of the radiation from the slots by 90 degrees, the resultant radiation from the unipole and the slots will be circularly polarized. Alternatively the outer surface of the dielectric block might be part spherical and the block may be associated with the unipole instead of the slots. The aerial is stated to be of use for installation on craft subject to erratic movements, e.g. balloons.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1284048A GB653018A (en) | 1948-05-10 | 1948-05-10 | Improvements in or relating to aerial systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1284048A GB653018A (en) | 1948-05-10 | 1948-05-10 | Improvements in or relating to aerial systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB653018A true GB653018A (en) | 1951-05-09 |
Family
ID=10012092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1284048A Expired GB653018A (en) | 1948-05-10 | 1948-05-10 | Improvements in or relating to aerial systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB653018A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2831188A (en) * | 1955-04-08 | 1958-04-15 | Sherla L Stutz | System for keying or modulating the radiation field of an antenna |
US4803494A (en) * | 1987-03-14 | 1989-02-07 | Stc Plc | Wide band antenna |
-
1948
- 1948-05-10 GB GB1284048A patent/GB653018A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2831188A (en) * | 1955-04-08 | 1958-04-15 | Sherla L Stutz | System for keying or modulating the radiation field of an antenna |
US4803494A (en) * | 1987-03-14 | 1989-02-07 | Stc Plc | Wide band antenna |
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