EP0374371B1 - Rod antenna for t.v. reception - Google Patents
Rod antenna for t.v. reception Download PDFInfo
- Publication number
- EP0374371B1 EP0374371B1 EP89116288A EP89116288A EP0374371B1 EP 0374371 B1 EP0374371 B1 EP 0374371B1 EP 89116288 A EP89116288 A EP 89116288A EP 89116288 A EP89116288 A EP 89116288A EP 0374371 B1 EP0374371 B1 EP 0374371B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rod antenna
- winding
- rod
- antenna according
- length
- 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
- 238000004804 winding Methods 0.000 claims description 21
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/06—Details
- H01Q9/14—Length of element or elements adjustable
- H01Q9/145—Length of element or elements adjustable by varying the electrical length
-
- 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
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
Definitions
- the invention is based on a rod antenna according to the preamble of claim 1.
- a rod antenna is known (EP-A-0 048 788) which is intended in particular for VHF radio reception. With this antenna, two windings are wound in opposite directions on an antenna rod.
- a rod antenna is also known (GB-A-2,030,778), which is suitable for several frequency ranges, such as the AM and FM broadcasting range and the Citizen-Band radio.
- the antenna rod of this antenna carries three different, connected impedance elements.
- Rod antennas for the reception of VHF and UHF television transmitters have hitherto only been known as telescopic antennas, the telescope length being changed more or less depending on the reception area.
- the invention has for its object to develop a rod antenna according to the preamble of claim 1 such that the rod antenna is suitable for both VHF and UHF television reception without a telescope that can be changed in length.
- FIG. 1 An embodiment of the invention is shown in the drawing using a figure and is explained in more detail below.
- the figure shows a rod antenna in section.
- 10 denotes a rod antenna made of a conically tapered insulating rod 11 with two windings 12 and 13 connected to one another, of which the first winding 12 ends before the free end 14 of the insulating rod 11. While the windings of the first winding 12 are wound with a relatively large pitch, the windings are the second. Winding 13, for example, wound without a slope. The second winding 13 is divided into two sections 14 and 18. Between the penultimate turn 15 and the last turn 16 of the first section 14, a first turn 17 of the second section 18 is contained, the other end 19 of which is connected to a band-shaped conductor 20.
- the band-shaped conductor is surrounded by a metallic sleeve 23, which at the same time connects a first threaded bolt 24 to one. Encloses end.
- the other end of the threaded bolt carries a threaded pin 25 which is screwed into a helical spring 26.
- a threaded pin 27 of a second threaded bolt 28 is screwed into the other end of the helical spring 26 and carries a further threaded pin 29 at its free end for fastening the rod antenna.
- the threaded bolt 28 forms the base of the rod antenna.
- An electrically conductive band 30 bridges the helical spring and is clamped with its ends between the threaded pins 25 and 27 and the associated ends of the helical spring 26.
- the windings 12 and 13 consist of an insulated wire, preferably of enamelled copper wire. With the exception of the further set screw 29, the entire rod antenna is surrounded by an elastic plastic sleeve 31.
- the overlapping turns 15, 16, 17 of the sections 14 and 18 of the second winding 13 form a capacitor which connects the windings 12 and 13 with the remaining part of the rod antenna, that is to say the sleeve 23, the first threaded bolt 24, the helical spring 26 and the second threaded bolt 28, capacitively couples.
- the length l1 between the base of the rod antenna 10 and the coupling means 15, 16, 17 and the second winding 13 for example ⁇ U / 4, where ⁇ U is the average operating wavelength of the UHF range, and the length l2 between the base and the free end of the first winding 12, for example ⁇ V / 4, where ⁇ V is the average operating wavelength of the VHF range, then the length l 1 of the rod antenna 10 acts as a UHF antenna and the length l 2 as a VHF antenna.
- the rod antenna can be screwed with its grub screw 29 into a swivel bracket which is attached, for example, to the roof of a vehicle.
- the antenna can be aligned either at 90 ° or at 0 ° to the horizontal and thus receive vertically or horizontally polarized waves.
Landscapes
- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
Die Erfindung geht von einer Stabantenne nach dem Oberbegriff des Anspruchs 1 aus.The invention is based on a rod antenna according to the preamble of claim 1.
Es ist eine Stabantenne bekannt (EP-A-0 048 788), die insbesondere für den UKW-Rundfunkempfang bestimmt ist. Bei dieser Antenne sind zwei Wicklungen in gegenläufigem Wickelsinn auf einen Antennenstab gewickelt. Es ist weiterhin eine Stabantenne bekannt (GB-A-2,030,778), die für mehrere Frequenzbereiche, wie den AM- und FM-Rundfunkbereich sowie den Citizen-Band-Funk, geeignet ist. Der Antennenstab dieser Antenne trägt drei verschiedene, miteinander verbundene Impedanzelemente. Stabantennen für den Empfang von VHF- und UHF-Fernsehsendern sind bisher nur als Teleskopantennen bekannt, wobei die Teleskoplänge je nach Empfangsbereich mehr oder weniger verändert wird.A rod antenna is known (EP-A-0 048 788) which is intended in particular for VHF radio reception. With this antenna, two windings are wound in opposite directions on an antenna rod. A rod antenna is also known (GB-A-2,030,778), which is suitable for several frequency ranges, such as the AM and FM broadcasting range and the Citizen-Band radio. The antenna rod of this antenna carries three different, connected impedance elements. Rod antennas for the reception of VHF and UHF television transmitters have hitherto only been known as telescopic antennas, the telescope length being changed more or less depending on the reception area.
Der Erfindung liegt die Aufgabe zugrunde, eine Stabantenne nach dem Oberbegriff des Anspruchs 1 derart weiterzubilden, daß die Stabantenne ohne ein in der Länge veränderbares Teleskop sowohl für den VHF- als auch für den UHF-Fernsehempfang geeignet ist.The invention has for its object to develop a rod antenna according to the preamble of claim 1 such that the rod antenna is suitable for both VHF and UHF television reception without a telescope that can be changed in length.
Diese Aufgabe wird bei einer Stabantenne gemäß dem Oberbegriff des Anspruchs 1 durch die im kennzeichnenden Teil dieses Anspruchs angegebenen Merkmale gelöst. Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß mit der Stabantenne Signale zweier verschiedener Fernsehfrequenzbereiche, das sind vorzugsweise der VHF- und der UHF-Bereich, empfangen werden können.This object is achieved in a rod antenna according to the preamble of claim 1 by the features specified in the characterizing part of this claim. The advantages that can be achieved with the invention are, in particular, that signals from two different television frequency ranges, that is preferably the VHF and UHF ranges, can be received with the rod antenna.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung an Hand einer Figur dargestellt und wird im folgenden näher erläutert. Die Figur zeigt eine Stabantenne im Schnitt.An embodiment of the invention is shown in the drawing using a figure and is explained in more detail below. The figure shows a rod antenna in section.
In der Figur bezeichnet 10 eine Stabantenne aus einem konisch verjüngten Isolierstoffstab 11 mit zwei miteinander verbundenen Wicklungen 12 und 13, von denen die erste Wicklung 12 bereits vor dem freien Ende 14 des Isolierstoffstabes 11 endet. Während die Windungen der ersten Wicklung 12 mit verhältnismäßig großer Steigung gewickelt sind, sind die Windungen der zweiter. Wicklung 13 beispielsweise ohne Steigung gewickelt. Die zweite Wicklung 13 ist in zwei Abschnitte 14 und 18 aufgeteilt. Zwischen der vorletzten Windung 15 und der letzten Windung 16 des ersten Abschnitts 14 ist eine erste Windung 17 des zweiten Abschnitts 18 enthalten, dessen anderes Ende 19 mit einem bandförmigen Leiter 20 verbunden ist. Der bandförmige Leiter ist ebenso wie das untere Ende 22 des Isolierstoffstabes 11 von einer metallischen Hülse 23 umgeben, die gleichzeitig einen ersten Gewindebolzen 24 an einen. Ende umschließt. Das andere Ende des Gewindebolzens trägt einen Gewindestift 25, der in eine Wendelfeder 26 eingeschraubt ist. In das andere Ende der Wendelfeder 26 ist ein Gewindestift 27 eines zweiten Gewindebolzens 28 eingeschraubt, der an seinem freien Ende einen weiteren Gewindestift 29 zum Befestigen der Stabantenne trägt. Der Gewindebolzen 28 bildet den Fußpunkt der Stabantenne. Ein elektrisch leitendes Band 30 überbrückt die Wendelfeder und ist mit seinen Enden zwischen den Gewindestiften 25 und 27 und den zugehörigen Enden der Wendelfeder 26 eingeklemmt. Die Wicklungen 12 und 13 bestehen aus einem isolierten Draht, vorzugsweise aus Kupferlackdraht. Die gesamte Stabantenne ist mit Ausnahme des weiteren Gewindestiftes 29 von einer elastischen Kunststoffhülle 31 umgeben.In the figure, 10 denotes a rod antenna made of a conically tapered
Die Wirkungsweise der vorstehend beschriebenen Stabantenne 10 ist folgende.The operation of the
Die sich überlappenden Windungen 15, 16, 17 der Abschnitte 14 und 18 der zweiten Wicklung 13 bilden einen Kondensator, der die Wicklungen 12 und 13 mit dem restlichen Teil der Stabantenne, das heißt der Hülse 23, dem ersten Gewindebolzen 24, der Wendelfeder 26 und dem zweiten Gewindebolzen 28, kapazitiv koppelt.The overlapping turns 15, 16, 17 of the
Beträgt die Länge l₁ zwischen dem Fußpunkt der Stabantenne 10 und den Kopplungsmitteln 15, 16, 17 bzw. der zweiten Wicklung 13 zum Beispiel λU/4, wobei λU die mittlere Betriebswellenlänge des UHF-Bereiches ist, und die Länge l₂ zwischen dem Fußpunkt und dem freien Ende der ersten Wicklung 12 zum Beispiel λV/4, wobei λV die mittlere Betriebswellenlänge des VHF-Bereiches ist, dann wirkt die Länge l₁ der Stabantenne 10 als UHF-Antenne und die Länge l₂ als VHF-Antenne.Is the length l₁ between the base of the
Die Stabantenne kann mit ihrem Gewindestift 29 in eine Schwenkhalterung eingeschraubt werden, die zum Beispiel auf dem Dach eines Fahrzeuges befestigt ist. Dadurch kann die Antenne wahlweise unter 90° oder unter 0° zu der Horizontalen ausgerichtet werden und somit vertikal oder horizontal polarisierte Wellen empfangen.The rod antenna can be screwed with its
Claims (6)
- Rod antenna for television reception having an elastic insulating material rod (11) which supports two windings (12, 13) which are connected to one another and which rod (11) supports at one end a helical spring (26) whose free end forms the base point of the antenna and whose other end is coupled to the second winding (13), characterised in that capacitive coupling means (15, 16, 17) are provided between the second winding (13) and the end of the spring (26) facing away from the base point of the rod antenna, and in that the length (l₁) between the base point and the capacitive coupling means is approximately λU/4 and the length (l₂) of the entire rod antenna (10) is approximately λV/4, λU being the mean operating wavelength of the UHF band and λV being the mean operating wavelength of the VHF band.
- Rod antenna according to Claim 1, characterised in that the capacitive coupling means (15, 16, 17) consist of a first turn (17) of a second section (18) of the second winding, which first turn (17) is located between the two last turns (15, 16) of a first section (14) of the second winding (13), and in that the wire for the two sections (14, 18) is an insulated wire.
- Rod antenna according to Claim 1, characterised in that the first winding (12) has a considerably greater pitch than the second winding (13).
- Rod antenna according to Claim 1, characterised in that the rod antenna (10) is surrounded by an elastic plastic sleeve (31) over its entire length.
- Rod antenna according to Claim 1, 3 or 4, characterised in that there is a region without a winding in front of the free end (14) of the insulating material rod (11).
- Rod antenna according to one of Claims 1 to 5, characterised in that the helical spring (26) can be bridged electrically by means of a conductor (30) in the form of a strip.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3842854 | 1988-12-20 | ||
DE3842854A DE3842854A1 (en) | 1988-12-20 | 1988-12-20 | ROD ANTENNA FOR TELEVISION RECEPTION |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0374371A1 EP0374371A1 (en) | 1990-06-27 |
EP0374371B1 true EP0374371B1 (en) | 1993-07-28 |
Family
ID=6369614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89116288A Expired - Lifetime EP0374371B1 (en) | 1988-12-20 | 1989-09-04 | Rod antenna for t.v. reception |
Country Status (4)
Country | Link |
---|---|
US (1) | US5057849A (en) |
EP (1) | EP0374371B1 (en) |
JP (1) | JPH02218201A (en) |
DE (2) | DE3842854A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6297711B1 (en) | 1992-08-07 | 2001-10-02 | R. A. Miller Industries, Inc. | Radio frequency multiplexer for coupling antennas to AM/FM/WB, CB/WB, and cellular telephone apparatus |
US5734352A (en) * | 1992-08-07 | 1998-03-31 | R. A. Miller Industries, Inc. | Multiband antenna system |
US6396365B1 (en) | 1963-07-16 | 2002-05-28 | R.A. Miller Industries, Inc. | Multiplexer for cellular telephone |
FI89646C (en) * | 1991-03-25 | 1993-10-25 | Nokia Mobile Phones Ltd | Antenna rod and process for its preparation |
US6384696B1 (en) | 1992-08-07 | 2002-05-07 | R.A. Miller Industries, Inc. | Multiplexer for sorting multiple signals from an antenna |
WO1994003939A1 (en) * | 1992-08-07 | 1994-02-17 | R.A. Miller Industries, Inc. | Multiband antenna system |
JPH07504795A (en) * | 1993-01-29 | 1995-05-25 | モトローラ・インコーポレイテッド | Antenna structure for wireless circuit and its method |
TW295733B (en) * | 1994-09-15 | 1997-01-11 | Motorola Inc | |
US5583520A (en) * | 1995-07-28 | 1996-12-10 | Motorola, Inc. | Matched input antenna for a portable radio |
KR19990010968A (en) * | 1997-07-19 | 1999-02-18 | 윤종용 | Dual band antenna |
US6219902B1 (en) | 1998-12-21 | 2001-04-24 | T & M Antennas | Method for manufacturing a protectively coated helically wound antenna |
DE19941501C1 (en) * | 1999-08-31 | 2001-06-28 | Bosch Gmbh Robert | Flexible antenna radiator |
KR20070050403A (en) * | 2004-05-24 | 2007-05-15 | 암페놀 티 앤드 엠 안테나즈 | Multiple band antenna and antenna assembly |
US8884838B2 (en) * | 2012-05-15 | 2014-11-11 | Motorola Solutions, Inc. | Multi-band subscriber antenna for portable two-way radios |
US9887462B2 (en) * | 2013-10-31 | 2018-02-06 | Motorola Solutions, Inc. | Antenna with embedded wideband matching substrate |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4145693A (en) * | 1977-03-17 | 1979-03-20 | Electrospace Systems, Inc. | Three band monopole antenna |
DE2729748A1 (en) * | 1977-07-01 | 1979-01-11 | Fte Maximal Fernsehtech | TELEVISION ANTENNA FOR VEHICLES, IN PARTICULAR MOTOR VEHICLES, CARAVANS, BOATS OR THE DIGITAL. |
US4229743A (en) * | 1978-09-22 | 1980-10-21 | Shakespeare Company | Multiple band, multiple resonant frequency antenna |
DE3036084A1 (en) * | 1980-09-25 | 1982-04-29 | Robert Bosch Gmbh, 7000 Stuttgart | ROD AERIAL, IN PARTICULAR FOR VHF BROADCAST RECEPTION |
US4442438A (en) * | 1982-03-29 | 1984-04-10 | Motorola, Inc. | Helical antenna structure capable of resonating at two different frequencies |
DE8320098U1 (en) * | 1983-07-08 | 1983-12-22 | Scheer, Hans-Dieter, 1000 Berlin | COOLING ANTENNA |
US4730195A (en) * | 1985-07-01 | 1988-03-08 | Motorola, Inc. | Shortened wideband decoupled sleeve dipole antenna |
US4675687A (en) * | 1986-01-22 | 1987-06-23 | General Motors Corporation | AM-FM cellular telephone multiband antenna for motor vehicle |
-
1988
- 1988-12-20 DE DE3842854A patent/DE3842854A1/en not_active Withdrawn
-
1989
- 1989-09-04 DE DE8989116288T patent/DE58905049D1/en not_active Expired - Lifetime
- 1989-09-04 EP EP89116288A patent/EP0374371B1/en not_active Expired - Lifetime
- 1989-12-11 US US07/448,750 patent/US5057849A/en not_active Expired - Fee Related
- 1989-12-19 JP JP1327504A patent/JPH02218201A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE58905049D1 (en) | 1993-09-02 |
DE3842854A1 (en) | 1990-06-21 |
US5057849A (en) | 1991-10-15 |
EP0374371A1 (en) | 1990-06-27 |
JPH02218201A (en) | 1990-08-30 |
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