DE1044904B - Antenna equipped with reflector, especially VHF and television antenna, with capacitive adjustment in the dipole - Google Patents

Antenna equipped with reflector, especially VHF and television antenna, with capacitive adjustment in the dipole

Info

Publication number
DE1044904B
DE1044904B DEF23054A DEF0023054A DE1044904B DE 1044904 B DE1044904 B DE 1044904B DE F23054 A DEF23054 A DE F23054A DE F0023054 A DEF0023054 A DE F0023054A DE 1044904 B DE1044904 B DE 1044904B
Authority
DE
Germany
Prior art keywords
antenna
dipole
reflector
capacitive adjustment
television
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.)
Pending
Application number
DEF23054A
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FUBA FABRIKATION FUNKTECHNISCH
Hans Kolbe and Co
Original Assignee
FUBA FABRIKATION FUNKTECHNISCH
Hans Kolbe and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FUBA FABRIKATION FUNKTECHNISCH, Hans Kolbe and Co filed Critical FUBA FABRIKATION FUNKTECHNISCH
Priority to DEF23054A priority Critical patent/DE1044904B/en
Publication of DE1044904B publication Critical patent/DE1044904B/en
Pending legal-status Critical Current

Links

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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
    • H01Q19/13—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination

Landscapes

  • Aerials With Secondary Devices (AREA)

Description

Die Erfindung bezieht sich auf eine mit Reflektor ausgerüstete Antenne, insbesondere UKW- und Fernsehantenne, mit kapazitiver Anpassung im Dipol.The invention relates to an antenna equipped with a reflector, in particular an FM and television antenna, with capacitive adjustment in the dipole.

Zur Erreichung des normalerweise üblichen Wertes von 240 Ohm ist es bekannt, Faltdipole zu verwenden. Gleichfalls bekannt ist die Verwendung einer T-Anpassung. Üblich ist auch die Verwendung einer Induktivität im Fußpunkt bei gleichzeitiger Verkürzung des Dipols, wobei sich nachteilig eine Verminderung der Leistungsaufnahme ergibt.To achieve the normally usual value of 240 ohms, it is known to use folded dipoles. Likewise the use of a T-adaptation is known. It is also common to use an inductor in the Base point with simultaneous shortening of the dipole, which is disadvantageous in a reduction in power consumption results.

Diese bekannten Vorrichtungen befriedigen aber nicht im gewünschten Maße; u. a. auch deswegen nicht, weil bei Antennen mit mehreren Elementen bei zu großer Länge des Dipols das Vor-Rück-Verhältnis und der horizontale Öffnungswinkel ungünstige Werte annehmen.However, these known devices are not satisfactory to the desired extent; i.a. also not because at Antennas with several elements if the length of the dipole is too long, the front-to-back ratio and the horizontal one The opening angles assume unfavorable values.

Eine wesentliche Verbesserung wird nach der Erfindung dadurch erzielt, daß die kapazitive Anpassung durch einen Kondensator erfolgt und die in dieser Weise infolge Änderung der elektrischen Länge des Elementes bewirkten unerwünschten Werte des Vor-Rück-Verhältnisses und des horizontalen Öffnungswinkels durch Umbiegen der Dipolenden unter Beibehaltung der elektrischen Länge beseitigt sind. Auf diese Weise können ohne Leistungsverlust die Elementenlänge, das Vor-Rück-Verhältnis und der horizontale Öffnungswinkel in den gewünschten Größenordnungen gehalten werden. Eine unerwünscht große Dipollänge ist nicht mehr erforderlich.A significant improvement is achieved according to the invention that the capacitive adjustment by a Capacitor takes place and caused in this way as a result of changing the electrical length of the element undesired values of the front-to-back ratio and the horizontal opening angle by bending the Dipole ends are eliminated while maintaining the electrical length. In this way, the element length, the front-to-back ratio and the horizontal opening angle can be kept in the desired order of magnitude. One undesirable large dipole length is no longer required.

In der Zeichnung ist eine Ausführungsform der Erfindung als Beispiel dargestellt.In the drawing, an embodiment of the invention is shown as an example.

Am Antennenträger 1 befindet sich der Dipol 2 mit den umgebogenen Enden 3. Weiter ist der Kondensator 4 angeordnet. Die Enden 3 des Dipols 2 können, wie in der Zeichnung dargestellt, in gleicher Richtung abgebogen sein. Es ist aber auch möglich, sie nach verschiedenen Richtungen oder in verschiedenen Ebenen in entsprechender und geeigneter Weise abzubiegen.The dipole 2 with the bent ends 3 is located on the antenna carrier 1. The capacitor 4 is also arranged. The ends 3 of the dipole 2 can, as shown in the drawing, bent in the same direction be. But it is also possible to move them according to different directions or in different planes and turn appropriately.

Claims (1)

Patentansprüche:Patent claims: 1. Mit Reflektor ausgerüstete Antenne, insbesondere UKW- und Fernsehantenne, mit kapazitiver Anpassung im Dipol, dadurch gekennzeichnet, daß die kapa-Mit Reflektor ausgerüstete Antenne,1. Antenna equipped with reflector, especially VHF and television antenna, with capacitive adjustment in the dipole, characterized in that the kapa antenna equipped with a reflector, insbesondere UKW- und Fernsehantenne, mit kapazitiver Anpassung im Dipolespecially VHF and television antenna, with capacitive adjustment in the dipole
DEF23054A 1957-05-17 1957-05-17 Antenna equipped with reflector, especially VHF and television antenna, with capacitive adjustment in the dipole Pending DE1044904B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF23054A DE1044904B (en) 1957-05-17 1957-05-17 Antenna equipped with reflector, especially VHF and television antenna, with capacitive adjustment in the dipole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF23054A DE1044904B (en) 1957-05-17 1957-05-17 Antenna equipped with reflector, especially VHF and television antenna, with capacitive adjustment in the dipole

Publications (1)

Publication Number Publication Date
DE1044904B true DE1044904B (en) 1958-11-27

Family

ID=7090693

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF23054A Pending DE1044904B (en) 1957-05-17 1957-05-17 Antenna equipped with reflector, especially VHF and television antenna, with capacitive adjustment in the dipole

Country Status (1)

Country Link
DE (1) DE1044904B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438136A1 (en) * 1994-10-27 1996-05-02 Sibet Gmbh Sican Forschungs Un Hybrid and broadband hybrid antenna

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2622197A (en) * 1950-09-14 1952-12-16 Eric W Cruser Two-fold antenna
US2749543A (en) * 1951-08-15 1956-06-05 Marvin P Middlemark Directional antenna systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2622197A (en) * 1950-09-14 1952-12-16 Eric W Cruser Two-fold antenna
US2749543A (en) * 1951-08-15 1956-06-05 Marvin P Middlemark Directional antenna systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438136A1 (en) * 1994-10-27 1996-05-02 Sibet Gmbh Sican Forschungs Un Hybrid and broadband hybrid antenna
EP0711000A2 (en) 1994-10-27 1996-05-08 SICAN F&E GmbH ( SIBET) Hybrid antenna and broadband hybrid antenna array

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