US2314234A - Frame antenna arrangement - Google Patents

Frame antenna arrangement Download PDF

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Publication number
US2314234A
US2314234A US338346A US33834640A US2314234A US 2314234 A US2314234 A US 2314234A US 338346 A US338346 A US 338346A US 33834640 A US33834640 A US 33834640A US 2314234 A US2314234 A US 2314234A
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United States
Prior art keywords
frame
arrangement
antenna arrangement
reception
coils
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Expired - Lifetime
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US338346A
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English (en)
Inventor
Meier Karl Heinrich
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Individual
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Individual
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Publication of US2314234A publication Critical patent/US2314234A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • 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

Definitions

  • the ratio of useful to disturbance voltage which ratio is the determining factor for the quality of a radio receiving arrangement, assumes values which cannot even be approached by any of the more simple types of antennae.
  • the invention relates to a frame antenna arrangement with non-rotatable frame antenna and two frame antennae relatively displaced by about their receiving plane.
  • the.arrangement is characterised by the fact that .the "two framevoltag'es come to act on a common'receiving circuit, that "this common receiving circuithas phase shifting means, and that the coupling ofthe fr'amevoltages to the first common receiving member takes place aperiodically.
  • the invention further :relates to a non-rotatable frame antenna arrangement which is constructed to be capable of being selectively switched over for directional and also for nondirectional reception. In this way it is possible to ma'kefull us'eof'th'e advantages of the rotat- 'able "frame antenna arrangement without havingto take account of the considerable disadvantages thereof.
  • the arrangement is characterised, by “the fact that the voltages of "the "frame antenna may be selectively conducted by means of the switching over device through at least two separate channels, that .one .of these channels has phase shifting impedances for thevolta ges of one frame, both frame voltages coming to act on a common receiving member after the phase shifting of the one frame voltage has taken place,
  • the'other channel has means by'which the phase rotation of the electric currentsiis effected in sucha way that when these means are mechanically adjusted addition or subtraction of the frame voltages takes place in such a waythat a directional reception is obtained.
  • connection 0f the f-rameantenna 'to the common receiving member is effected com- .pletely-aperiodically, that is to say withtheze'xception of the switching over of the frame santenna arrangement to directional tor :non-fdirec- -tional 'reception'and also the setting ofibearing or the transmitter to be received when adjusted removed.
  • resonant means may also be employed.
  • the factor a contains the number of turns 22 of the secondary winding, assumed to be constant, the resistance R acting in the grid circuit of the tube, the degree of coupling and the like in addition.
  • Fig. 1 is the electrical circuit diagram of a frame antenna arrangement, the cross frame ar- Figs. 3 and 3a show a constructional example other by 90.
  • Fig. 3b shows a detail thereof.
  • Figs. 4 and 4a. show another constructional example of the same device in elevation and plan.
  • Fig. 5 shows a further constructional example of the subject of the invention with two possibilities of connection for directional and nondirectional reception and the coupling of the cross frame arrangement to the common receiving member.
  • Fig. 6 shows the electrical circuit diagram of a constructional example of the installation according to the invention with three positions of connection, that is, a first position for nondirectional reception, a second position for the usual directional reception, and a third position fo combined reception screened on one side and resulting in a cardioid pattern, with still another arrangement of the coupling and the antennae down-lead.
  • Figs. 7, 7a and 71 show three reception diagrams of the frame antenna arrangement according to the invention (the representation of co-ordinates has been omitted since the receiving diagram shown is generally known).
  • the frame antenna arrangement shown in Fig. 1 has the two frame antennae I, 2 whose reception planes are displaced relatively to one an- These frames have in one construction by way of example a diameter of cm. and have each two turns.
  • the frame antennae are connected through a screened cable down-lead 6 by means of the input transformers 3, 4 with the common receiving device consisting of the first amplifier tube 5.
  • the down-lead cable 6 is a screened cable consisting of three conductors I, 8, 9 and the screening sheath is connected to the common chassis potential of the receiving arrangement.
  • the middle conductor 8 is once more surrounded by a separate screen I0 which is also connected to the common potential, this being for the purpose of decoupling the down-lead 8 from the two cable conductors I, 9.
  • connection of the frame I with the common receiving arrangement takes place by means of the antenna down-lead 8, 9 and the primary winding of the transformer 4, whilst frame 2 acts upon the common receiving arrangement through the conductor 1, 8 and the primary winding of the transformer 3.
  • the secondary winding of the transformer 4 contains a resistance I l by which a phase shift of one frame voltage through is efiected.
  • the most favourable coupling data for the receiving frames given and for a down-lead having a characteristic impedance of ohms are as follows: Number of turns of primary winding 40 turns, number of turns of secondary winding 250, corresponding to 72 ,cHy and 450 ,uHy, whilst the phase displacing resistance II is of 6000 ohms.
  • the input tube 5 may be a suitable screen grid tube or a triode, the anode resistance being 'chosen to correspond with the characteristics of the tube.
  • Fig. 7 shows the receiving diagram of this arrangement.
  • the frame antenna arrangement shown in Fig. 2 has similar frame antennae and the same dimensions as described in connection with Fig. 1.
  • the frame circuit of this arrangement has a bearing setting device which has two cylindrical coils I2, l3 the axes of which make an angle of 90 with one another and the voltages of each frame come to act upon one of these cylindrical coils; the cylindrical coil 12 being fed from frame 1 and the cylindrical coil l3 from frame 2.
  • Within each of these cylindrical coils is a movable coil M, 15 respectively which are arranged upon a common axis and lie in a common plane.
  • These coils l4, are connected in series and are connected with the grid of the amplifier tube 5.
  • the frame antennae l, 2 are once more connected through a three-conductor screened cable with the coils I2, l3.
  • FIGs. 3, 3a and 3b and 4, 4a Two constructional examples of this bearing determining coil assembly are more clearly shown in Figs. 3, 3a and 3b and 4, 4a.
  • the movable coils l4, l5 are arranged within the crossed cylindrical coils l2, l3 respectively. These two coils l4, l5 are fixedly mounted upon the common axis !6. By rotating this axis the bearing of the transmitter to be received is adjusted.
  • these movable coils are arranged within an electrostatic screening container H. In order that this container I! should not short-circuit the coil it is cut in halves by a slit I1; this screening II is once more connected to the chassis potential and the receiver arrangement.
  • the frame antennae are constructed in the same way as is described in connection with Fig. 1.
  • the connection shown in the figure is a selectable combination of the individual arrangements shown in Figs. 1 and 2.
  • the switches l9, 2:: shown in full lines the arrangement is connected according to Fig. 1 for non-directional reception whilst in the position of the switches 19, 20 shown in dotted lines the arrangement works with directional reception, that is according to Fig. 2.
  • These switches I9, 20 are upon a common axis and are actuated simultaneously.
  • the primary and secondary windings of the input transformer 3, 4 are decoupled capacitively by the electrostatic screens 2i and 2
  • the frame antennae are arranged and constructed as described in connection with Fig. 1, but the individual frame voltages are fed each through a separate transformer 3, 4 to an amplifier valve 5a., 5b.
  • the anode of each of these two tubes is connected with the switch segment of the changeover switch I911, I91), I 90. In the switch position shown in full lines, the apparatus is adjusted for non-directional reception.
  • the tube So. has an anode impedance '22 and delivers its amplified alternating voltages through the condenser 23 to the grid of the-tube-S.
  • the anode of the tube 5b has also a resistance 24 as anode impedance and a phase shifting member consisting of the resistance 25, and the condenser 26.
  • This phase shifting member effects a phase displacement of The voltages amplified by the valve 51) are therefore also impressed on the grid circuit of the common amplifier tube after they have been shifted through 90.
  • the coils l2 and [3 of the directive or-bearing setting arrangement are connected as anode impedances, whilst the grid circuit of the tube 5 is connected to the two series connected directional coils I4, l5.
  • These directional coils are similarl constructed to the example already referred to according to Figs. 3, 3a, 3b or 4, 4a.
  • a frame antenna arrangement for broadcast reception two stationary frame antennae having their reception planes disposed at right angles to each other, a common receiving memher to be acted upon by both frame voltages, a plurality of separate conducting channels, and a switch device to selectively connect said frame antennas to said separate channels, one of said channels including phase shifting ,impedances to effect phase shifting of one frame-voltage before application thereof to the common receiving member for obtaining non-directional reception, the second channel including means which are mechanically adjustable to effect addition or subtraction of the frame voltages for obtaining directional reception.
  • a frame antenna arrangement as claimed in claim 1, in which said means in said second channel comprises two stationary cylindrical coils disposed with their axes at right angles to each other, each coil being acted upon by one of the frame voltages, and two movable coils, one in each cylindrical coil, said movable coils being arranged in a common plane on a common axis and being connected in series, said arrangement including means to apply the voltages derived from said movable coils to said common receiving member.
  • a frame antenna arrangement as claimed in claim 1, in which said means in said second *electrical axes disposed at right angles to each other, said arrangement including means to apply the voltages derived from said movable coils to said common receiving member.
  • a frame antenna arrangement as claimed in claim 1, including a high frequency iron coupling transformer to effect a fixed coupling.
  • a frame antenna arrangement including a receiver chassis, a high frequency iron coupling transformer having a primary winding and a secondary winding, and an electrostatic screen between said windings for the purpose of capacitive decoupling, said screen being electrically connected to the chassis potential.
  • a frame antenna arrangement including a receiver chassis, a high frequency iron coupling transformer having a primary winding and a secondary winding, and
  • an electrostatic screen enclosing one of said windings and being electrically connected to the chassis potential.
  • phase shifting impedances in said first channel are adapted to effect a phase shifting of 90.
  • a frame antenna arrangement as claimed in claim 1, including a down-lead having several conductors and a screen, said screen decoupling at least one of said conductors from the remaining conductors.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
US338346A 1939-06-26 1940-06-01 Frame antenna arrangement Expired - Lifetime US2314234A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2314234X 1939-06-26

Publications (1)

Publication Number Publication Date
US2314234A true US2314234A (en) 1943-03-16

Family

ID=4568532

Family Applications (1)

Application Number Title Priority Date Filing Date
US338346A Expired - Lifetime US2314234A (en) 1939-06-26 1940-06-01 Frame antenna arrangement

Country Status (3)

Country Link
US (1) US2314234A (de)
CH (1) CH221752A (de)
FR (1) FR866257A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2620471A (en) * 1945-03-28 1952-12-02 Rca Corp Radio direction finder
US3977004A (en) * 1975-06-16 1976-08-24 The United States Of America As Represented By The Secretary Of The Navy Aircraft VLF/LF/MF window antenna receiving system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879506A (en) * 1951-10-31 1959-03-24 Marconi Wireless Telegraph Co Radio direction finders

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2620471A (en) * 1945-03-28 1952-12-02 Rca Corp Radio direction finder
US3977004A (en) * 1975-06-16 1976-08-24 The United States Of America As Represented By The Secretary Of The Navy Aircraft VLF/LF/MF window antenna receiving system

Also Published As

Publication number Publication date
CH221752A (de) 1942-06-15
FR866257A (fr) 1941-07-21

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