GB491485A - Improvements in or relating to radio transmitting antennae - Google Patents
Improvements in or relating to radio transmitting antennaeInfo
- Publication number
- GB491485A GB491485A GB8525/38A GB852538A GB491485A GB 491485 A GB491485 A GB 491485A GB 8525/38 A GB8525/38 A GB 8525/38A GB 852538 A GB852538 A GB 852538A GB 491485 A GB491485 A GB 491485A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phase
- terminals
- relating
- radio transmitting
- sections
- 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 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000005562 fading Methods 0.000 abstract 1
- 239000012212 insulator Substances 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
491,485. Aerials. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 19, 1938, No. 8525. Convention date, April 16, 1937. [Class 40 (v)] To reduce high-angle radiation, and fading, a vertical aerial is divided by insulators 3 into upper and lower coaxial sections, the former 1 being say five times the length of the latter. The two sections are fed in phase-opposition through a tubular transmission line 4 and a phase-adjusting network 6 shown separately in Fig. 3. The upper section 1 is preferably energized from below, and the lower section 2 from above, through leads from the terminals T3 and T4. The feed line 4 is connected to the terminals T1, T2, the phase and amplitude of the two supplies being controlled by the variable couplings shown in Fig. 3. Specification 474,769 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US137178A US2118429A (en) | 1937-04-16 | 1937-04-16 | Antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB491485A true GB491485A (en) | 1938-09-02 |
Family
ID=22476145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8525/38A Expired GB491485A (en) | 1937-04-16 | 1938-03-19 | Improvements in or relating to radio transmitting antennae |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2118429A (en) |
| GB (1) | GB491485A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2502155A (en) * | 1948-03-02 | 1950-03-28 | Charles L Jeffers | Low-angle radiation antenna |
| FR2287118A1 (en) * | 1974-10-04 | 1976-04-30 | Thomson Csf | VERTICAL ANTENNA WITH OFFSET FEEDING AND ANTENNA GROUPING INCLUDING SUCH ANTENNA |
| US4145693A (en) * | 1977-03-17 | 1979-03-20 | Electrospace Systems, Inc. | Three band monopole antenna |
| US4184165A (en) * | 1978-09-07 | 1980-01-15 | Stuart Electronics | Tuning system for tower antennas |
| US4642650A (en) * | 1984-12-07 | 1987-02-10 | Morton Thomas M | Portable HF antenna |
| JP5070001B2 (en) * | 2007-10-25 | 2012-11-07 | 三菱電機株式会社 | Antenna device |
| JP6032249B2 (en) * | 2014-07-24 | 2016-11-24 | 三菱電機株式会社 | Antenna device |
-
1937
- 1937-04-16 US US137178A patent/US2118429A/en not_active Expired - Lifetime
-
1938
- 1938-03-19 GB GB8525/38A patent/GB491485A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2118429A (en) | 1938-05-24 |
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