GB1272990A - Directional antennae - Google Patents
Directional antennaeInfo
- Publication number
- GB1272990A GB1272990A GB44682/69A GB4468269A GB1272990A GB 1272990 A GB1272990 A GB 1272990A GB 44682/69 A GB44682/69 A GB 44682/69A GB 4468269 A GB4468269 A GB 4468269A GB 1272990 A GB1272990 A GB 1272990A
- Authority
- GB
- United Kingdom
- Prior art keywords
- members
- adjacent ends
- dipole arms
- terminals
- lines
- 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
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
-
- 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
- H01Q7/005—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 variable reactance for tuning the antenna
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
- Details Of Aerials (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
1,272,990. Aerials. SONY CORP. 10 Sept., 1969 [10 Sept., 1968; 14 Dec., 1968], No. 44682/69. Heading H4A. An aerial comprises a loop aerial element consisting of at least three arcuate conductive members. Output terminals are provided on the adjacent ends of two of the members, and impedance means having values which satisfy stated mathematical relationships are connected between other adjacent ends of the said members. In one embodiment, two upper and lower loops are respectively made up of members 29, 30, 31, 32 and 33, 34, 35, Fig. 15, and said loops are spaced apart by conductive bars 41, 42, 43, 44. Feeder terminals 18 are provided on the adjacent ends of the members 29, 32 and a dummy load Z 3 is connected between the adjacent ends of the members 30, 31. Air gaps between the adjacent ends of the pairs of members 29, 30; 31, 32; 33, 34; 34, 35 provide capacitive impedances and two telescopic dipole arms 46, operating at a lower frequency than the loop element, are connected through trap circuits 47 to the ends of the members 29, 32 which are remote from the terminals 18. The dipole arms may alternatively be connected through trap circuits to the feeder terminals (18), Fig. 18A (not shown), or to the bars (41), (42) Fig. 18B (not shown). In another arrangement the dipole arms are connected to shortcircuited ends of quarter-wave lines (the wavelength (#) being that corresponding to the midband frequency of operation of the loop element). The other ends of said lines are respectively connected to the adjacent ends of the members (33), (34) and (34), (35), Fig. 18D (not shown). The dipole arms may alternatively be connected to the junctions of two pairs of #/4 lines, one pair being open-circuited, and the other pair being connected to the feeder terminals (18), Fig. 18E (not shown). Two pairs of dipole arms may be provided, each arm being connected through a trap circuit to an end remote from the feeder terminals of one of the members (29), (32), (33), (35), Fig. 18C (not shown). The arrangement as shown in Fig. 15 may be used without dipole arms being provided (Figs. 12, not shown), and in another embodiment four arcuate sheet members are used, each having an outline as defined, for example, by the members 32, 35 of Fig. 15 and the vertical lines joining their ends (Fig. 11, not shown). Three impedance elements are provided, respectively connected across gaps between the members. In other embodiments, members forming single loops are used. Adjacent ends of members may be bridged, for example, by inductors (Fig. 7, not shown) or by active elements (Fig. 9, not shown). It is stated that suitable selection of the impedance elements reduces sidelobes and increases operating bandwidth. Specification 1,250,562 is mentioned.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP43065131A JPS4912025B1 (en) | 1968-09-10 | 1968-09-10 | |
JP9193168A JPS4912024B1 (en) | 1968-12-14 | 1968-12-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1272990A true GB1272990A (en) | 1972-05-03 |
Family
ID=26406258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB44682/69A Expired GB1272990A (en) | 1968-09-10 | 1969-09-10 | Directional antennae |
Country Status (3)
Country | Link |
---|---|
US (1) | US3623110A (en) |
DE (1) | DE1945850C3 (en) |
GB (1) | GB1272990A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2951875A1 (en) * | 1978-12-21 | 1980-07-10 | Sony Corp | ANTENNA SYSTEM |
GB2380325A (en) * | 2001-06-20 | 2003-04-02 | Univ Belfast | Loop antennae with opposed gaps |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3737907A (en) * | 1971-06-30 | 1973-06-05 | Mini Products Inc | Multiband quad and loop antenna |
US3721990A (en) * | 1971-12-27 | 1973-03-20 | Rca Corp | Physically small combined loop and dipole all channel television antenna system |
US3740753A (en) * | 1972-02-28 | 1973-06-19 | Mini Prod Inc | Multiband quad and loop antenna |
US3761933A (en) * | 1972-09-21 | 1973-09-25 | Rca Corp | Loop antenna with distributed impedance near the terminating gap |
JPS5753684B2 (en) * | 1973-06-15 | 1982-11-15 | ||
DE2907369C2 (en) * | 1979-02-24 | 1984-10-18 | Dornier System Gmbh, 7990 Friedrichshafen | Antenna arrangement for towing bodies |
US4380011A (en) * | 1980-11-25 | 1983-04-12 | Rca Corporation | Loop antenna arrangement for inclusion in a television receiver |
US5285210A (en) * | 1990-05-08 | 1994-02-08 | Nippon Sheet Glass Co., Ltd. | Double loop antenna with reactance elements |
EP0584882A1 (en) * | 1992-08-28 | 1994-03-02 | Philips Electronics Uk Limited | Loop antenna |
US5900842A (en) * | 1997-09-20 | 1999-05-04 | Lucent Technologies, Inc. | Inexpensive directional antenna that is easily tuned and weather resistant |
US6359594B1 (en) | 1999-12-01 | 2002-03-19 | Logitech Europe S.A. | Loop antenna parasitics reduction technique |
US20090146902A1 (en) * | 2007-11-09 | 2009-06-11 | Kuen-Hua Li | Loop-Type Antenna and Antenna Array |
DE102009011542A1 (en) | 2009-03-03 | 2010-09-09 | Heinz Prof. Dr.-Ing. Lindenmeier | Antenna for receiving circularly in a direction of rotation of the polarization of broadcast satellite radio signals |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2166750A (en) * | 1936-02-15 | 1939-07-18 | Rca Corp | Antenna |
US2520154A (en) * | 1948-10-16 | 1950-08-29 | Standard Telephones Cables Ltd | Radio antenna |
US2644888A (en) * | 1949-01-25 | 1953-07-07 | John J Root | High-frequency antenna |
US2657312A (en) * | 1951-09-28 | 1953-10-27 | Saranga Cesare | Radio and television antenna |
DE973146C (en) * | 1953-07-23 | 1959-12-10 | Telefunken Gmbh | Antenna arrangement for a wide frequency range |
US3035266A (en) * | 1958-05-23 | 1962-05-15 | Marshall Thomas Albert | Broad band active element for television arrays |
US3078462A (en) * | 1958-07-18 | 1963-02-19 | Julius Herman | One-turn loop antenna |
US3441935A (en) * | 1965-08-19 | 1969-04-29 | Technical Appliance Corp | Loop antenna with negative resistance element at terminating gap |
-
1969
- 1969-09-09 US US856281A patent/US3623110A/en not_active Expired - Lifetime
- 1969-09-10 DE DE1945850A patent/DE1945850C3/en not_active Expired
- 1969-09-10 GB GB44682/69A patent/GB1272990A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2951875A1 (en) * | 1978-12-21 | 1980-07-10 | Sony Corp | ANTENNA SYSTEM |
GB2380325A (en) * | 2001-06-20 | 2003-04-02 | Univ Belfast | Loop antennae with opposed gaps |
GB2380325B (en) * | 2001-06-20 | 2005-06-01 | Univ Belfast | Improvements relating to antennas |
Also Published As
Publication number | Publication date |
---|---|
DE1945850C3 (en) | 1981-11-05 |
DE1945850A1 (en) | 1970-03-26 |
DE1945850B2 (en) | 1981-01-15 |
US3623110A (en) | 1971-11-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PE20 | Patent expired after termination of 20 years |