Патент USA US2112301код для вставки
March 29, 1938. w. MOSER 2,112,301 RADIANT ENERGY GUIDE CHANNEL Filed Feb. l, 1935 , 5 s L.. ÖJ‘ / / CONT/POL €\_ Y 35;’ STAT/0M s C'O/i/TÑÓL Cw œ INVENTOR. WILHELM MOSER ATTORNEY. 2,112,301 Patented Mar. 29, 1938 i UNITED STATES PATENT OFFICE 2,112,301 RADIANT ENERGY GUIDE’CHANNEL Wilhelm Moser, Berlin, Germany, assignor to Telefunken Gesellschaft fur Drahtlose Tele~ graphie m. b. H., Berlin, Germany, a corpo~ , ration of Germany Application-‘February 1, 1935, Serial No. 4,466 In Germany January 31, 1934 8 Claims. (Cl. Z50-11) This invention relates to an arrangement'for radiation guide channels. This invention will best be understood by referringv to the accom panying drawing, in’which: Fig. 1 shows a cir cuit diagram of a system of radiation guide channels; Fig. 2 is a cardioid diagram of radia tion guide channels; Fig. 3 is a preferred circuit diagram of radiation guide channels of _this in vention; andFig. 4 is another preferred circuit i diagram of radiation‘guide channels of this in Vention. Figure 1 shows a known arrangement for the production of radiation guide channels, i. e., more or less narrow space zones destined to “a guide crafts in' particular sea vessels and air i crafts, and which _are -rendered recognizable in radio apparatus, for instance, in that 'within the said zones the receiving intensities of two radia tions having differently directed axes are the same, or that these intensities have a definite l constant relationship. The antenna A formed as vertical double dipole is fed, for instance, in the center thereof across energy lines B by a high frequency generator C. The reiiector antennae D and E constituted as in the case of the antenna 5 A by vertical double dipoles of suitable length, have a place for separation in the center thereof whereby in the state of interruption of the said place by means of remotely controlled switches F and G the said reflector antenna can be made l inoperative. Switches F and G are provided with a magnet M comprising two coils joined together at the center. A common armature N, shown by the dash lines, passes through the center of both coils of magnet M and is linked to the 5 blades of switches F and G. Magnet M is elec trically connected to a remote control station S having the well-known means for energizing the coil on the left to close switch G and then en ergizing the coil on the right to close switch F D in alternate sequence. By means of such an ar rangement, two directional diagrams alternating in time intervals, for instance, the two cardioids shown in Figure 2 can be obtained. Each of these cardioids can be produced by means of the 5 central antenna A in combination with one of the respectively operating reñector antennae E or D. lNow it has been found that with such an arrangement the expected well defined shape of 0 the characteristic of the directive radiation can be very rarely obtained. This can be explained by the fact that a complete inoperativeness of the respective reflector by opening its switch is not possibly attainable, since the radiation cou 5 pled wires, although detuned, radiate progress ing, as well as standing waves, hence they con tinue to radiate perpendicular to the direction of- the wire thereof, i. e., they distort in an un desirable and concealed manner the radiation diagram, in particular, also the horizontal radia- 5 tion diagram of the antennae. The theoretical ideal would be to completely lremove out of space the- reflectorl antenna to be rendered inoperative. Since, however, thel shutting off of the reflector antennae is desired in the rhythm of the keying 10 of the signals, theV theoretical ideal cannot be fulfilled. In accordance with the invention, the theoreti cal ideal can be approached if, instead of simply interrupting or short-circuiting the antenna 15 parts to be rendered inoperative, they are switched to resistances which are equal to the wave resistance of the said antenna parts. It is well known that an electrical wave passing across a wire will be reflected at the open or short-cir 20 cuited end of the said wire. If, however, the end of the wire is connected to a resistor equal tov the wave resistance of the wire, reflection does not occur. O'nly progressing waves pass across the wire and which do not radiate perpendicularly but under a more or less steep angle to the direc tion of the wire. Hereby is the energy of the radiation produced by the progressing waves small in comparison with the radiation of stand ing waves. ` 30 Figure 3 shows, by way of example, an embodi~ ment in accordance with the invention for the case in which each reñector consists' of two M2 dipoles arranged abo-ve each other, which, for the purpose of carrying out the inoperativeness, are connected to each other. The reflectors D and E are co'nnected to the switches F and G with their inner free ends and across the resistors H1, H2, H3, H4. The resistors are so dimensioned 40 as to obtain the equation wherein Z is the resistance of each dipole. Figure 4 shows, by way of example, a corre sponding construction for the case in which each 45 reflector consists of a single dipole only and which will be interrupted when placed out of operation. The resistors to be inserted, namely, H5 and Hs are here suitably placed in parallel to the switches G and F and the size thereof is to be chosen equal to Z/2. I claim: 1. A radio directional system having, in com bination, an antenna, a high frequency generator for feeding energy to said antenna, a reflecting 2 2,112,301 antenna parallel to said antenna, and means for switchingr in and out of circuit a resistance unit which is connected to said reflector antenna, said resistance being equal to the wave resistance of the antenna. 2. A radio Ydirectional channel system having, in combination, an antenna, a high frequency generator for feeding energy to said antenna, a pair of reflecting antennae arranged parallel to said antenna, each reilecting antenna having an individual resistance unit connected therewith, and means for switching in and out of circuit the individual resistance unit which is connected to each reflecting antenna, each resistance unit be 15 ing equal to the wave resistance of the antenna. 3. A radio directional system having, in com bination, a plurality of antennae parallel ar ranged, at least one of said antennae being con nected to a high frequency generator for feeding 20 energy thereto, and means for switching in and out of circuit a resistance which is connected to the other o-f said antennae not connected to said high frequency generator, said resistance being equal to the wave resistance of the antenna. 25 4. A radio directional system having in com bination three antennae at least one of which is connected to a high frequency generator, the other two antennae acting as reñectors, and means for switching in and out of circuit a 30 resistance unit which is individually connected to each reflector, each resistance unit having a resistance value substantially equal to the wave resistance of the reflector to which it is con nected. 5. A radio directional system having in com 35 bination, three antennae, said antennae being in the form of vertical dipoles parallel arranged to each other, at least one of said dipoles located in the center of the other two and connected to a high frequency generator for feeding energy to said one dipole, the other two dipoles having means for switching in and out of circuit a re sistance, said resistance being equal to the wave resistance of said antenna. 6. A radio directional channel system having in combination, an antenna, a high frequency gen erator for feeding energy to said antenna, two half-wave dipole reflectors havin'g inner free ends, said dipole reflectors arranged parallel to said antenna, means including a switch for a1-ternately switching in and out of circuit a re sistance which is in series with each of said inner free ends o-f the half-wave dipoles and said switch, said resistance being equal to the wave resistance of said antenna. '7. A radio directional channel system having in combination, an antenna, a high frequency gen erator for feeding energy to said antenna, two single dipole reflectors having inner free ends, said dipole reflectors arranged parallel to said antenna, a switch connected in series with each inner free end of said single-dipole for alternate ly switching in and out of circuit a resistance which is connected in parallel with said switch, the value of said resistance being equal to one half the resistance of said single dipole. _ 8. A radio directional system having in com bination, an antenna, a high frequency genera tor for feeding energy to said antenna, a reflect ing antenna having inner free ends arranged par allel to said antenna, and means for alternately switching in and out of circuit said reñecting an tenna, said means comprising a switch and a re sistance having a value equal to 4the wave resist ance of said reflecting antenna, said switch and resistance connected with the inner free ends of the reflector. WILHELM MOSER.