GB489775A - Improvements in or relating to antenna systems - Google Patents
Improvements in or relating to antenna systemsInfo
- Publication number
- GB489775A GB489775A GB3239/37A GB323937A GB489775A GB 489775 A GB489775 A GB 489775A GB 3239/37 A GB3239/37 A GB 3239/37A GB 323937 A GB323937 A GB 323937A GB 489775 A GB489775 A GB 489775A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aerial
- tube
- earthed
- sleeve
- wavelength
- 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
- 230000005540 biological transmission Effects 0.000 abstract 2
- 239000004020 conductor Substances 0.000 abstract 2
- 230000005855 radiation Effects 0.000 abstract 2
- 238000003491 array Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
- H01Q21/10—Collinear arrangements of substantially straight elongated conductive units
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Details Of Aerials (AREA)
Abstract
489,775. Directive wireless signalling; aerials. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Feb. 3, 1937, No. 3239. Convention date, Feb. 3, 1936. [Class 40 (v)] A broadcasting aerial for uniform and maximum radiation in the horizontal plane comprises a straight tubular conductor 1, the bottom quarter wavelength of which is recessed in a conducting earthed roof top RT, and comprising radiating half wavelength sections 2 and a halfwavelength section 3 therebetween, the radiation from which is suppressed by a sleeve 4 which is earthed by a half wave - length connection 14 running through the tube 1. The sleeve 4 may be supported at its mid-point by an insulating or metallic ring member R from the tube 1, and an adjustable sleeve 5 at the upper end of the tube 1 is provided to enable the electrical length of the aerial to be varied. A transmission line TL connects the transmitter HFA to an adjustable tapping TP at the base of the aerial. The diameter of the tube 1 is made relatively large, e.g. one fifteenth of a wavelength to enable it to radiate a wide frequency band. In a modification, Fig. 2 (not shown), the aerial has several radiating portions separated by screened portions, the screens being earthed by conductors one or a multiple of half wavelengths long, and the aerial is inductively coupled to the transmission line. The aerials may be extended symmetrically from a centre to form an extended dipole antenna and may be arranged in arrays for additional directivity.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US62017A US2113136A (en) | 1936-02-03 | 1936-02-03 | Antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB489775A true GB489775A (en) | 1938-08-03 |
Family
ID=22039680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3239/37A Expired GB489775A (en) | 1936-02-03 | 1937-02-03 | Improvements in or relating to antenna systems |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2113136A (en) |
| GB (1) | GB489775A (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2530048A (en) * | 1950-11-14 | Unbalanced-to-balanced impedance | ||
| US2496242A (en) * | 1944-07-22 | 1950-01-31 | Philco Corp | Antenna system |
| US2593474A (en) * | 1944-10-03 | 1952-04-22 | Us Sec War | Antenna matching section |
| US4207841A (en) * | 1945-05-19 | 1980-06-17 | The United States Of America As Represented By The Secretary Of The Army | Dipole antenna for proximity fuze |
| US2462865A (en) * | 1945-05-24 | 1949-03-01 | Standard Telephones Cables Ltd | Center fed antenna |
| US2473421A (en) * | 1945-05-30 | 1949-06-14 | Fubini Eugene | Search antenna array |
| US2509253A (en) * | 1946-04-29 | 1950-05-30 | Farnsworth Res Corp | Vertical antenna array |
| US2531476A (en) * | 1947-04-28 | 1950-11-28 | Farnsworth Res Corp | Ultra high frequency antenna |
| US2502155A (en) * | 1948-03-02 | 1950-03-28 | Charles L Jeffers | Low-angle radiation antenna |
| US2767397A (en) * | 1951-03-31 | 1956-10-16 | Motorola Inc | Antenna |
| US2821709A (en) * | 1952-03-21 | 1958-01-28 | Fucci Salvatore | Antennas |
| US2941204A (en) * | 1955-06-16 | 1960-06-14 | Arnold B Bailey | Antenna mount |
| US2852774A (en) * | 1955-08-11 | 1958-09-16 | Andrew Corp | Suppressor-type antenna |
| US2896206A (en) * | 1955-11-08 | 1959-07-21 | Andrew Corp | Radiation choke |
| US3139620A (en) * | 1959-12-23 | 1964-06-30 | Kenneth L Leidy | Coaxial multiband antenna |
| US3315264A (en) * | 1965-07-08 | 1967-04-18 | Brueckmann Helmut | Monopole antenna including electrical switching means for varying the length of the outer coaxial conductor with respect to the center conductor |
| US5835070A (en) * | 1996-09-27 | 1998-11-10 | Ericsson Inc. | Retractable antenna |
-
1936
- 1936-02-03 US US62017A patent/US2113136A/en not_active Expired - Lifetime
-
1937
- 1937-02-03 GB GB3239/37A patent/GB489775A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2113136A (en) | 1938-04-05 |
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