GB657343A - Improvements in or relating to frame-aerial systems - Google Patents
Improvements in or relating to frame-aerial systemsInfo
- Publication number
- GB657343A GB657343A GB32855/48A GB3285548A GB657343A GB 657343 A GB657343 A GB 657343A GB 32855/48 A GB32855/48 A GB 32855/48A GB 3285548 A GB3285548 A GB 3285548A GB 657343 A GB657343 A GB 657343A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aerials
- loops
- aerial
- central loop
- conductors
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
657,343. Aerials. PHILIPS ELECTRICAL, Ltd. Dec. 20, 1948, No. 32855. Convention date, Dec. 23, 1947. Addition to 656,887. [Class 40 (vii)] An aerial system comprises a plurality of aerials of the type described in the parent Specification and each comprising a central loop aerial surrounded by a plurality of metal plates forming effective short-circuited loops lying in the plane of the central loop, the loops aerials all lying in the same plane and adjacent loop aerials being coupled to a common conducting plate. Fig. 1 illustrates an aerial system for transmitting overlapping-beam beacon signals, the central loop aerial 2 being supplied with carrier-wave signal, while the aerials 1 and 3 are supplied with suitably phased side-band signals corresponding to the modulation tones being employed. Metal plates which behave as short-circuited loops are arranged around the primary aerials as shown. As indicated in the Figures, the couplings between each common conductor and the conductors adjacent thereto are made less than those between the other conductors and those between the conductors and the loop aerials. In the arrangement shown in Fig. 2, the central loop aerial is fed with carrier-wave signals while the aerials 14, 15, 16 and 17 are fed with side-band energy which is so phased that a continuouslyrotating directivity pattern is obtained. With this arrangement primary aerials of small dimensions may be used so that the configurations shown may be obtained; thus it is stated that in a prior art system utilizing socalled Alford Loops, the outer loops of three, as shown in Fig. 1, had to be so large that no room existed for the central loop which had consequently to be split into two, one above and one below the plane of the outer loops. It is also stated that the arrangements illustrated exhibit wide-band properties. The invention may also be applied to the overlapping beam direction-finder system described in Specification 655,678.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL657343X | 1947-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB657343A true GB657343A (en) | 1951-09-19 |
Family
ID=19795271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32855/48A Expired GB657343A (en) | 1947-12-23 | 1948-12-20 | Improvements in or relating to frame-aerial systems |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2596595A (en) |
| BE (1) | BE486465A (en) |
| FR (1) | FR58922E (en) |
| GB (1) | GB657343A (en) |
| NL (1) | NL78888C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3741497A (en) * | 1996-07-29 | 1998-02-20 | Motorola, Inc. | Magnetic field antenna and method for field cancellation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB519350A (en) * | 1937-12-06 | 1940-03-21 | Standard Telephones Cables Ltd | Directional radio antenna arrays |
| US2289856A (en) * | 1940-09-25 | 1942-07-14 | Internat Telephone & Eadio Mfg | Broadcasting antenna system |
-
0
- NL NL78888D patent/NL78888C/xx active
- BE BE486465D patent/BE486465A/xx unknown
-
1948
- 1948-10-19 US US55316A patent/US2596595A/en not_active Expired - Lifetime
- 1948-12-20 GB GB32855/48A patent/GB657343A/en not_active Expired
- 1948-12-21 FR FR58922D patent/FR58922E/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL78888C (en) | |
| BE486465A (en) | |
| US2596595A (en) | 1952-05-13 |
| FR58922E (en) | 1954-04-22 |
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