DE735827C - Circuit arrangement for the goniometer used in the Adcock system according to patent 706538 - Google Patents

Description

Circuit arrangement for that used in the Adcock system according to patent 706538 Goniometer addendum to patent 706 538 The subject of the main patent is a Adcock antenna system in which the individual antennas are connected to those in the middle High-frequency grounded field coils of a goniometer are connected to the characteristic that one or more additional coils are arranged in this way in the goniometer are that a voltage is induced in them by the currents flowing to earth which can be used for determining the side and / or clearing it.

In Fig. I an embodiment is one of the subject of the main claim used goniometer. There are four field windings on an iron ring a f1 to f4 are arranged offset from one another by go ″.

There are two diametrically opposite coils at each end Connected to one another via lines V and grounded.

Furthermore, all windings are tapped in the middle and over this Taps connected to the four individual antennas of an Adcock system. The sense of winding the individual field windings is chosen so that the bearing currents in from the iron ring exiting field H while those flowing down to earth produce the vertical antenna effect resulting currents supply a ring flow H 'remaining in the iron ring. The search coil c is arranged on a rotatable iron core and is adjusted in a known manner so that that it is not aroused by the Peilfiuss II.

On the goniometer ring a there are also four auxiliary windings connected in series e1 to e4 attached symmetrically distributed between the individual field windings. These auxiliary windings are only excited by the toroidal flux H '. Since the ring flow against the bearing flow is shifted in phase by go ', is sent to the Clamps the auxiliary winding receive a voltage that is defined with respect to the bearing voltage Has phase position and therefore useful for clearing and / or side determination is.

In the practical use of goniometers of this type has especially in the shortwave range shown that when over painting a larger one A phase correction of the auxiliary voltage is necessary because of the wave range the antenna system for the DF voltage and the auxiliary voltage are not exactly the same Has natural waves. It has already been proposed to use this phase correction one in the ground line of the field coil centers and with the receiver tuning to make forcibly changeable capacitor. According to another suggestion this correction capacitor lies in an intermediate circuit excited by the auxiliary voltage. In both cases there is a mechanical coupling between the receiver tuning and the correction capacitor. which often have constructive difficulties prepares. especially if there is only a small amount of installation space available in the Peiempfänger stand.

Claims (2)

According to the invention it is therefore proposed. the phase correction the auxiliary voltage for goniometers in connection with an Adcock antenna system the main patent by one in the ground line of the field coil centers or in one Two-pole or four-pole switched on by the auxiliary voltage to undertake. whose reactance curve is selected in this way. that he is within a In a certain frequency range, the phase rotation required for phase correction the auxiliary voltage causes. An embodiment of the invention is shown in FIG. The DF antenna system consists of two crossed Adcock antennas, of which only one drawn out with the individual antennas A1 and A2 and the field coils f1 and f2 became. The direction finder coil c is located in the receiver input circuit and is activated with the aid of the Capacitor D matched. The auxiliary coil e, on which the side determination and / or clearing evaluated auxiliary voltage arises, lies in an aperiodic intermediate circuit ZK, which is coupled to the search coil circuit with the help of the transformer Ü. In the ground line of the field coil centers is now according to the invention a heavily damped parallel resonance circuit S switched on, its reactance response is represented in Fig. 3 by the curve X. The tuning position and the damping this parallel resonance circle are chosen so that within the range @f the reactance curve required for phase correction of the auxiliary voltage K is simulated. As practical tests have shown, this simulation make with sufficient accuracy in such a way that by varying the self-induction the correction at the lowest frequency a and the correction by varying the capacitance is made at the highest frequency b of the range @f. Then the correction is correct for the frequencies in between with practically sufficient accuracy. It should also be pointed out. that the phase correction also with Help of quadrupole can be achieved. The correction link can also be in place m in the intermediate circuit ZK of the arrangement according to Fig. 2. In this case one will the easiest way to use a damped series resonance circuit. P A T E N T A N S P R Ü C H E: 1. Circuit arrangement for the at Adcock system according to patent 706 538 used goniometer, in which to generate a Auxiliary voltage for the clouding and / or side determination on one of the field coil windings supporting ring of high-frequency iron auxiliary windings are arranged. those of the Ring River of the goniometer are excited, in particular for short-wave direction finding, characterized in that that energized in the earth line of the field coil centers or in one of the auxiliary voltage Intermediate circuit is a two-pole or four-pole, whose reactance response is such is chosen to be within a certain frequency range for each frequency causes a phase shift in the auxiliary voltage. those of the required Phase correction corresponds. 2. Circuit arrangement according to claim 1, characterized in that the correction element from a heavily damped series or parallel resonance circuit stands.