GB1343498A - Multifrequency antenna system - Google Patents
Multifrequency antenna systemInfo
- Publication number
- GB1343498A GB1343498A GB1568671*[A GB1568671A GB1343498A GB 1343498 A GB1343498 A GB 1343498A GB 1568671 A GB1568671 A GB 1568671A GB 1343498 A GB1343498 A GB 1343498A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dipole
- conductors
- vhf
- band
- conductor
- 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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
- H01Q5/48—Combinations of two or more dipole type antennas
- H01Q5/49—Combinations of two or more dipole type antennas with parasitic elements used for purposes other than for dual-band or multi-band, e.g. imbricated Yagi antennas
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Aerials With Secondary Devices (AREA)
- Details Of Aerials (AREA)
Abstract
1343498 Aerials RCA CORPORATION 19 April 1971 [27 May 1970] 15686/71 Heading H4A An aerial effective over two spaced frequency bands comprises first and second spaced elongated dipole elements which are of differing lengths and are parallel to each other. Each dipole includes two parallel rod-like conductors having central portions with electrical terminals connected to a common transmission line, and oppositely extending outer portions. The first dipole element is of such length as to act as a full-wave resonator at a frequency within the higher of said frequency bands, and the second dipole element is of such length as to act as a half-wave resonator at a frequency within the lower of said frequency bands. The central portions of the rod-like conductors of the second dipole element overlap. thereby providing an interaction with the first dipole to condition the performance of the aerial on the higher of the said frequency bands. As described, an aerial system comprises one portion which is effective in the UHF TV band (470 to 890 MHz) and another portion which is effective in both the high and low VHF TV bands (174 to 216 MHz and 54 to 88 MHz, respectively). Both portions are mounted on a boom 10, Fig. 1, which is carried by a mast 2, and have a common feeder 9. The UHF portion, at the front end of the the boom 10, comprises a sheet metal fan-like dipole element 21 with terminals 23, 25 to which the line 9 is connected, four directors 13, 15, 17, 19 whose extremities are bent backwards towards the element 21, and a corner reflector 27 having two members 28, 29 disposed at about 110 degrees to each other and supporting reflector rods 31, 31a, 32, 32a, 33, 33a. The VHF portion of the aerial system is behind the reflector 27 and comprises an array of four centre-fed dipole elements 55, 57, 59, 61 which increase in length from front to rear, directors 35, 53, and a reflector element 63. The element 55 is fullwave resonant at a frequency in the high VHF TV band and the elements 57, 59, 61 are halfwave resonant at frequencies in the low VHF TV band. The directors 35, 53 have lengths which correspond, respectively, to frequencies at the high end of the low VHF TV band and at the high end of the high VHF TV band. The reflector element 63 has a length which corresponds to a frequency at the low end of the low VHF TV band. The active elements 55, 57, 59, 61 and the parasitic elements 35, 63 each comprise two rod-like conductors which are carried by insulating supports of the kind described in Specification 1,319,798 and which are overlapped by various amounts at said supports, as is shown for the element 57 in Fig. 6, to provide additional shunt capacitances to improve performance and impedance matching. The director 53 is a single rod-like conductor, and the conductors 37, 39 of the director 35 are formed with loops 41, 43. The inner ends of the reflector element 63 and of the director 35 are connected to the boom 10. The conductors of the dipole elements 55, 57, 59, 61 are connected to the conductors 75, 77 of a balanced transmission line. The conductor 75 is above, and the conductor 77 is below the boom 10. A transposition between each successive dipole element is obtained by disposing the right hand conductor of one element in the upper groove of its insulating support (and the left hand conductor in the lower groove), then disposing the left hand conductor of the next element in the upper groove of its insulating support (and the right hand conductor in the lower groove), and so on. The conductors 75, 77 are connected to the terminals 23, 25 by transition sections, and two pairs of quarter-wave stubs, resonant respectively at the low and high ends of the UHF TV band are provided, to prevent coupling of UHF signals into the VHF portion of the aerial system (Figs. 3, 4, not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4086270A | 1970-05-27 | 1970-05-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1343498A true GB1343498A (en) | 1974-01-10 |
Family
ID=21913382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1568671*[A Expired GB1343498A (en) | 1970-05-27 | 1971-05-19 | Multifrequency antenna system |
Country Status (5)
Country | Link |
---|---|
US (1) | US3653056A (en) |
JP (1) | JPS5635041B1 (en) |
CA (1) | CA920242A (en) |
DE (1) | DE2047315A1 (en) |
GB (1) | GB1343498A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010068537A2 (en) * | 2008-12-10 | 2010-06-17 | Sensis Corporation | Dipole array with reflector and integrated electronics |
GB2480003A (en) * | 2010-04-26 | 2011-11-02 | Pds Electronics Inc | Parallel conductor, balanced transmission line, feeding an antenna array |
US8669911B2 (en) | 2010-04-26 | 2014-03-11 | Pds Electronics, Inc. | Balanced transmission line with parallel conductors |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD244866S (en) * | 1975-10-14 | 1977-06-28 | Rca Corporation | Insulator for an antenna |
US3984841A (en) * | 1975-10-14 | 1976-10-05 | Rca Corporation | Broadband antenna system with the feed line conductors spaced on one side of a support boom |
AU2429695A (en) * | 1994-04-29 | 1995-11-29 | Pacific Monolithics, Inc. | Dual-array yagi antenna |
US5528252A (en) * | 1994-10-26 | 1996-06-18 | Ntl Technologies Inc. | Dipole television antenna |
USD385563S (en) * | 1996-01-11 | 1997-10-28 | Pacific Monolithics, Inc. | Dual-array yagi antenna |
US6677914B2 (en) * | 2001-05-15 | 2004-01-13 | Michael E. Mertel | Tunable antenna system |
US6930649B1 (en) * | 2003-02-03 | 2005-08-16 | Paul D. Sergi | Log-periodic dipole antenna |
US7463211B2 (en) * | 2006-03-28 | 2008-12-09 | Fluid Motion, Inc. | Adjustable antenna element and antennas employing same |
US7911406B2 (en) * | 2006-03-31 | 2011-03-22 | Bradley Lee Eckwielen | Modular digital UHF/VHF antenna |
US7626557B2 (en) | 2006-03-31 | 2009-12-01 | Bradley L. Eckwielen | Digital UHF/VHF antenna |
US7388555B1 (en) | 2007-03-09 | 2008-06-17 | Mertel Michael E | Adjustable-frequency two-element bowtie antenna |
US8842053B1 (en) | 2008-03-14 | 2014-09-23 | Fluidmotion, Inc. | Electrically shortened Yagi having improved performance |
US9105963B2 (en) | 2012-11-27 | 2015-08-11 | Fluidmotion, Inc. | Tunable Yagi and other antennas |
US10693211B2 (en) | 2017-09-06 | 2020-06-23 | SteppIR Communications Systems Inc. | Controller for configuring antennas having adjustable elements |
US11158958B2 (en) * | 2019-12-26 | 2021-10-26 | Shure Acquisition Holdings, Inc. | Dual band antenna |
CN212380558U (en) * | 2020-06-09 | 2021-01-19 | 深圳市安拓浦科技有限公司 | Antenna element structure and antenna |
US11532885B2 (en) | 2021-03-30 | 2022-12-20 | Channel Master, Llc | Modular antenna and antenna assembly |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2975423A (en) * | 1958-03-24 | 1961-03-14 | Antenna Designs Inc | Antenna director |
US2888678A (en) * | 1958-07-16 | 1959-05-26 | Antenna Designs Inc | Antenna driven element |
US3362026A (en) * | 1965-01-27 | 1968-01-02 | Jen Chu | Shortened log periodic antenna |
US3475759A (en) * | 1967-10-10 | 1969-10-28 | Winegard Co | Television antenna with built-in cartridge preamplifier |
-
1970
- 1970-05-27 US US40862A patent/US3653056A/en not_active Expired - Lifetime
- 1970-09-25 DE DE19702047315 patent/DE2047315A1/en not_active Ceased
- 1970-09-29 JP JP8579970A patent/JPS5635041B1/ja active Pending
-
1971
- 1971-03-26 CA CA108877A patent/CA920242A/en not_active Expired
- 1971-05-19 GB GB1568671*[A patent/GB1343498A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010068537A2 (en) * | 2008-12-10 | 2010-06-17 | Sensis Corporation | Dipole array with reflector and integrated electronics |
WO2010068537A3 (en) * | 2008-12-10 | 2010-09-10 | Sensis Corporation | Dipole array with reflector and integrated electronics |
US8138986B2 (en) | 2008-12-10 | 2012-03-20 | Sensis Corporation | Dipole array with reflector and integrated electronics |
GB2480003A (en) * | 2010-04-26 | 2011-11-02 | Pds Electronics Inc | Parallel conductor, balanced transmission line, feeding an antenna array |
GB2480003B (en) * | 2010-04-26 | 2012-10-24 | Pds Electronics Inc | Balanced transmission line with parallel conductors |
US8669911B2 (en) | 2010-04-26 | 2014-03-11 | Pds Electronics, Inc. | Balanced transmission line with parallel conductors |
Also Published As
Publication number | Publication date |
---|---|
CA920242A (en) | 1973-01-30 |
US3653056A (en) | 1972-03-28 |
DE2047315A1 (en) | 1971-12-09 |
JPS5635041B1 (en) | 1981-08-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |