DE556169C - Frame angle antenna for direction finding purposes - Google Patents

Frame angle antenna for direction finding purposes

Info

Publication number
DE556169C
DE556169C DENDAT556169D DE556169DD DE556169C DE 556169 C DE556169 C DE 556169C DE NDAT556169 D DENDAT556169 D DE NDAT556169D DE 556169D D DE556169D D DE 556169DD DE 556169 C DE556169 C DE 556169C
Authority
DE
Germany
Prior art keywords
direction finding
antennas
frame angle
antenna
angle antenna
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
Application number
DENDAT556169D
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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of DE556169C publication Critical patent/DE556169C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Description

Rahmenwinkelantenne für Peilzwecke Die zum Anpeilen von Sendern benutzten Antennen bestehen aus einem oder zwei rechtwinklig zueinander stehenden, um -eine Achse drehbaren Rahmenantennen oder aus einer oder mehreren Rahmenantennen in Verbindung mit Richtungsantennen, welche als offene Antennen ausgebildet sind. Rahmenantennen besitzen bekanntlich die Eigenschaft, daß Hochfrequenzwellen, welche die Rahmenfläche senkrecht treffen, weitaus weniger stark empfangen werden als solche, die aus Richtung der Antennenebene kommen. Beiden im rechten Winkel zueinander stehenden Rahmenantennen, wie sie neuerdings bekanntgeworden sind, ist die von den beiden Antennen gelieferte Stromstärke in vier Stellungen, nämlich dann, wenn die Winkelhalbierenden des von den Rahmenantennen gebildeten Winkels seines Scheitelwinkels oder seiner Nebenwinkel auf den Sender zeigen, gleich groß. Man hat diesem Übelstand in der neueren Zeit durch Verwendung einer abgestimmten offenen Antenne zur Überlagerung der von den Rahmenantennen gelieferten Schwingungen abzuhelfen versucht. Der Nachteil dieser Einrichtung liegt aber darin, daß eine vollautomatische Peilung ausgeschlossen ist und bei Anpeilung der Sender jedesmal erst die Abstimmung zwischen offenen Antennen und Rahmenantennen vorgenommen werden muß. Dieser übelstand wird durch die vorliegende Erfindung beseitigt, und zwar dadurch, daß die Stromgleichheit beider Antennen auf höchstens zwei Antennenstellungen zurückgeführt wird, deren Absolutwerte leicht unterscheidbar sind. Die Erfindung besteht aus zwei im Winkel mechanisch miteinander verbundenen Rahmenantennen a und b, zwischen denen ein oder mehrere im Winkel um einen der Rahmen gebogene und diesen nach einer Richtung abschirmende, geerdete oder nichtgeerdete Metallfolien c angeordnet sind. Durch diese Abschirmung werden die vier Strahlrichtungen bei ungeschirmten Rahmenpaaren, bei denen beide Antennen unter sich gleiche Ströme führen, auf höchstens zwei bei einer abgeschirmten Antenne zurückgeführt, deren Absolutwerte sehr verschieden sind.Angle frame antenna for direction finding purposes The antennae used to locate transmitters consist of one or two frame antennas that are at right angles to each other and rotatable about an axis or one or more frame antennas in conjunction with directional antennas, which are designed as open antennas. As is known, loop antennas have the property that high-frequency waves which hit the frame surface perpendicularly are received far less strongly than those which come from the direction of the antenna plane. For both loop antennas, which are at right angles to one another, as they have recently become known, the current intensity delivered by the two antennas is the same in four positions, namely when the bisector of the angle of its apex angle or its secondary angle formed by the loop antennas point to the transmitter . Attempts have recently been made to remedy this drawback by using a tuned open antenna to superimpose the vibrations supplied by the loop antennas. The disadvantage of this device, however, is that fully automatic direction finding is not possible and the coordination between open antennas and loop antennas must be carried out each time when the transmitter is located. This drawback is eliminated by the present invention, namely in that the current equality of the two antennas is reduced to at most two antenna positions, the absolute values of which are easily distinguishable. The invention consists of two frame antennas a and b mechanically connected to one another at an angle, between which one or more metal foils c are arranged, bent at an angle around one of the frames and shielding this in one direction, earthed or ungrounded. As a result of this shielding, the four beam directions in unshielded frame pairs, in which both antennas carry the same currents, are reduced to a maximum of two in a shielded antenna, the absolute values of which are very different.

Claims (1)

PATENTANSPRUCIi: Rahmenwinkelantenne für Peilzwecke, dadurch gekennzeichnet, daß zwischen die im verstellbaren Winkel mechanisch miteinander verbundenen Einzelrahmen ein oder mehrere im Winkel um einen der Rahmen gebogene und diesen nach einer Richtung abschirmende, geerdete oder nichtgeerdete Metallfolien angeordnet sind.PATENT CLAIM: Frame angle antenna for direction finding purposes, characterized in that that between the individual frames mechanically interconnected at an adjustable angle one or more bent at an angle around one of the frames and this in one direction shielding, earthed or ungrounded metal foils are arranged.
DENDAT556169D Frame angle antenna for direction finding purposes Expired DE556169C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE556169T

Publications (1)

Publication Number Publication Date
DE556169C true DE556169C (en) 1933-11-09

Family

ID=6564671

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT556169D Expired DE556169C (en) Frame angle antenna for direction finding purposes

Country Status (1)

Country Link
DE (1) DE556169C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474238A (en) * 1945-06-27 1949-06-28 Myron Y Eck Single null loop antenna

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474238A (en) * 1945-06-27 1949-06-28 Myron Y Eck Single null loop antenna

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