US3390394A - Dual loop antenna - Google Patents
Dual loop antenna Download PDFInfo
- Publication number
- US3390394A US3390394A US401127A US40112764A US3390394A US 3390394 A US3390394 A US 3390394A US 401127 A US401127 A US 401127A US 40112764 A US40112764 A US 40112764A US 3390394 A US3390394 A US 3390394A
- Authority
- US
- United States
- Prior art keywords
- loop
- antenna
- conductor
- terminal
- loops
- 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 - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
- H01Q7/08—Ferrite rod or like elongated core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/04—Non-resonant antennas, e.g. travelling-wave antenna with parts bent, folded, shaped, screened or electrically loaded to obtain desired phase relation of radiation from selected sections of the antenna
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/04—Screened antennas
Definitions
- the invention relates to an antenna, more particularly a TV antenna, of small dimensions and large band width and includes a continuous conductor placed in two rectangular loops, and metal powder tubes which are positioned around three of the long sides of the loops to reduce the Q-value of the antenna, and a plastic covering enclosing the conductor and the metal powder tubes.
- the present invention relates to an antenna including a continuous conductor placed in two substantially rectangular loops.
- the antennas employed must have a certain dimension adapted to the wave length in question, and this dimension as a rule is not shorter than half the wave length at horizontal antennas or a quarter of the wave length at vertical antennas.
- this dimension as a rule is not shorter than half the wave length at horizontal antennas or a quarter of the wave length at vertical antennas.
- antennas having auxiliary elements in the form of directors and reflectors.
- Prior-art antennas thus generally have considerable dimensions, which is disadvantageous in many respects. Further, such antennas are rather selective, and their efiiciency therefore considerably decreases when one goes beyond the wave length for which the antenna is adapted, which particularly applies to antennas having auxiliary elements.
- the invention has for its object to eliminate these disadvantages and to provide a very small, lightweight and broadband antenna. This is realized in that the long sides of the rectangular loops are parallel with each other and coplanar and three of said loops are enclosed in metal powder tubes.
- FIG. 1 is a diagrammatical view of the antenna according to the invention.
- FIGS. 2 and 3 are views of difierent ways of feeding the antenna.
- the conductor 10 and the tubes 22, 23, 24 thereon are enclosed in a sheath 25 of plastic material consisting of a central tube in which parts -13 and 17 are enclosed, two tubular portions projecting at right angles from the upper end of the tube in opposite directions and containing parts 14 and 18, respectively, two tubular portions extending from the ends of the first-mentioned tubular portions at right angles thereto and in parallel with the central tube and accommodating part 15 and braid 22 and respectively part 19 and braid 24, and finally two tubular portions extending from the ends of the last-mentioned tubular portions at right angles thereto and to the central tube and connected to said central tube, part 16 and part 20, respectively, of the conductor being enclosed in said final tubular portions. All conductor parts and braids may be conveniently secured and, as the case may be, centered in the various tubular portions of the sheath.
- the feed line used preferably is a coaxial cable having an impedance of 709; however, also a band cable having an impedfance of 3009 may be employed.
- the coaxial cable may be connected [as shown in FIG. 1, in which case, however, the standing wave ratio will be rather high, for which reason the connection should preferably be efiected as shown in FIGS. 2. and 3. With the connection utilized in FIG. 2 one end of the conductor 12 is free while a resistor R is connected to the other end. The inner conductor of the coaxial cable is connected to the terminal 'B and the braid of the coaxial cable to the terminal A. With the manner of feeding according to FIG.
- the antenna had to be rotated to a certain position in relation to the transmitting station to obtain the highest possible rece-ption quality.
- the antenna can therefore be used for the reception of signals coming from all directions, provided that their strength is not too low, while at low signal strengths the antenna like the prior-art antennas has to be set in a certain position in relation to each transmitting station.
- the invention thus provides an antenna which can be utilized with good efliciency for a considerable range of frequencies. Furthermore, the antenna is simple, can be mounted indoors or outdoors with simple and cheap means and finally can be manufactured to a price considerably lower than that of conventional antennas.
- a large bandwidth antenna including a continuous conductor extending in two rectangular loops with the long sides thereof parallel and coplanar with each other, a first terminal, the conductor extending from said first terminal merging into one short side of the first rectangular loop and after completion of said loop merging into one short side of the second loop, and completing said second loop, a second terminal on said conductor at the end of said second loop, tubes of metal powder around all the long sides of said loops except the one adjacent the second terminal, and a plastic covering enclosing said loops and said tubes, the terminals being accessible through said covering for the connection of a feed line thereto.
- a large bandwidth antenna including a continuous conductor extending in two rectangular loops with th long sides thereof parallel and coplanar with each other, the conductor extending into one short side of the first rectangular loop and after completion of said loop merging ino one short side of the second loop and completing said second loop, the ends of said loop being connected, tubes of metal powder around all the long sides of said loop except the second side adjacent the end of the second loop, a first terminal connected to the connection between the ends of the loop, a resistor having one end connected between said first terminal and the connection between the ends of the loop, a second terminal at the other end of said resistor, and a plastic covering enclosing said loops and said tubes, the terminals being accessible through sa d covering for the connection of a feed line to said terminals.
- a large bandwidth antenna including a continuous conductor extending in two rectangular loops with the long sides thereof parallel and coplanar with each other, the conductor extending into one short side of the first rectangular loop and after completion of said loop merging into one short side of the second loop and completing said second loop, tubes of metal powder around all the long sides of said loops except the second side adjacent the end of the second loop, a first terminal connected to the end of said second loop, a resistor having one end connected between said first terminal and the end of said second loop, a second terminal at the other end of said resistor, the end of said conductor starting said first loop being left unconnected, and a plastic covering enclosing said loops and said tubes, the terminals being accessible through said covering for the connection of a feed line to said terminals.
Landscapes
- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE10866/63A SE321715B (de) | 1963-10-04 | 1963-10-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3390394A true US3390394A (en) | 1968-06-25 |
Family
ID=20292957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US401127A Expired - Lifetime US3390394A (en) | 1963-10-04 | 1964-10-02 | Dual loop antenna |
Country Status (12)
Country | Link |
---|---|
US (1) | US3390394A (de) |
AT (1) | AT257695B (de) |
BE (1) | BE653878A (de) |
CH (1) | CH425909A (de) |
DE (1) | DE1441688A1 (de) |
DK (1) | DK111574B (de) |
ES (1) | ES304640A1 (de) |
FI (1) | FI41299B (de) |
GB (1) | GB1079048A (de) |
NL (1) | NL6411537A (de) |
NO (1) | NO119688B (de) |
SE (1) | SE321715B (de) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4872018A (en) * | 1987-08-31 | 1989-10-03 | Monarch Marking Systems, Inc. | Multiple loop antenna |
US4972198A (en) * | 1987-08-31 | 1990-11-20 | Monarch Marking Systems, Inc. | Multiple loop antenna |
US6252550B1 (en) * | 1998-06-17 | 2001-06-26 | Peter Joseph Vernon | Planar antenna device |
US6407706B2 (en) | 1998-06-17 | 2002-06-18 | Peter J. Vernon | Planar antenna device |
US20080106154A1 (en) * | 2006-11-07 | 2008-05-08 | Boyd Joseph J | Electromagnetic energy collector |
US20140134958A1 (en) * | 2012-11-09 | 2014-05-15 | Futurewei Technologies, Inc. | Dual Feed Antenna System |
US9466872B2 (en) | 2012-11-09 | 2016-10-11 | Futurewei Technologies, Inc. | Tunable dual loop antenna system |
US9735822B1 (en) * | 2014-09-16 | 2017-08-15 | Amazon Technologies, Inc. | Low specific absorption rate dual-band antenna structure |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1296177A (en) * | 1915-11-27 | 1919-03-04 | Marconi Wireless Telegraph Co America | Aerial for wireless signaling. |
US1731992A (en) * | 1923-11-17 | 1929-10-15 | Drahtlose Telegraphie Gmbh | Indoor aerial |
US2521550A (en) * | 1946-02-28 | 1950-09-05 | Bell Telephone Labor Inc | Radio antenna system |
US2537191A (en) * | 1947-05-08 | 1951-01-09 | Clarence C Moore | Antenna |
CA538388A (en) * | 1957-03-19 | J. Polydoroff Wladimir | Antennas for radio apparatus |
-
1963
- 1963-10-04 SE SE10866/63A patent/SE321715B/xx unknown
-
1964
- 1964-10-02 US US401127A patent/US3390394A/en not_active Expired - Lifetime
- 1964-10-02 GB GB40187/64A patent/GB1079048A/en not_active Expired
- 1964-10-02 NL NL6411537A patent/NL6411537A/xx unknown
- 1964-10-02 BE BE653878D patent/BE653878A/xx unknown
- 1964-10-02 AT AT841864A patent/AT257695B/de active
- 1964-10-03 DE DE19641441688 patent/DE1441688A1/de active Pending
- 1964-10-03 ES ES0304640A patent/ES304640A1/es not_active Expired
- 1964-10-03 NO NO154999A patent/NO119688B/no unknown
- 1964-10-03 DK DK488564AA patent/DK111574B/da unknown
- 1964-10-03 CH CH1285964A patent/CH425909A/de unknown
- 1964-10-03 FI FI2087/64A patent/FI41299B/fi active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA538388A (en) * | 1957-03-19 | J. Polydoroff Wladimir | Antennas for radio apparatus | |
US1296177A (en) * | 1915-11-27 | 1919-03-04 | Marconi Wireless Telegraph Co America | Aerial for wireless signaling. |
US1731992A (en) * | 1923-11-17 | 1929-10-15 | Drahtlose Telegraphie Gmbh | Indoor aerial |
US2521550A (en) * | 1946-02-28 | 1950-09-05 | Bell Telephone Labor Inc | Radio antenna system |
US2537191A (en) * | 1947-05-08 | 1951-01-09 | Clarence C Moore | Antenna |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4872018A (en) * | 1987-08-31 | 1989-10-03 | Monarch Marking Systems, Inc. | Multiple loop antenna |
US4972198A (en) * | 1987-08-31 | 1990-11-20 | Monarch Marking Systems, Inc. | Multiple loop antenna |
US6252550B1 (en) * | 1998-06-17 | 2001-06-26 | Peter Joseph Vernon | Planar antenna device |
US6407706B2 (en) | 1998-06-17 | 2002-06-18 | Peter J. Vernon | Planar antenna device |
US20080106154A1 (en) * | 2006-11-07 | 2008-05-08 | Boyd Joseph J | Electromagnetic energy collector |
US20140134958A1 (en) * | 2012-11-09 | 2014-05-15 | Futurewei Technologies, Inc. | Dual Feed Antenna System |
US9466872B2 (en) | 2012-11-09 | 2016-10-11 | Futurewei Technologies, Inc. | Tunable dual loop antenna system |
US9735822B1 (en) * | 2014-09-16 | 2017-08-15 | Amazon Technologies, Inc. | Low specific absorption rate dual-band antenna structure |
Also Published As
Publication number | Publication date |
---|---|
GB1079048A (en) | 1967-08-09 |
BE653878A (de) | 1965-02-01 |
SE321715B (de) | 1970-03-16 |
FI41299B (de) | 1969-06-30 |
AT257695B (de) | 1967-10-25 |
ES304640A1 (es) | 1965-03-16 |
NO119688B (de) | 1970-06-22 |
DK111574B (da) | 1968-09-16 |
NL6411537A (de) | 1965-04-05 |
CH425909A (de) | 1966-12-15 |
DE1441688A1 (de) | 1968-10-24 |
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