SU65838A3 - Anti-noise antenna - Google Patents

Description

As is well known, many interference to radolriem is obtained by electric pulses penetrating the power supply and creating voltage interference between the ujac-CB receiver and the ground.

To attenuate interference, it is already a matter of using two antennas, a long one and a short one, and feeding the receiver to the difference in voltage from two antennas.

The present invention makes the use of two anteps non-zero;

The subject of the invention is an anti-noise receiving antenna. Its distinctive feature is its use as a counterweight by mounting in the receiver a grid that compensates for noise coming from an antenna consisting of a single wire.

The invention is explained in the attached drawing.

FIG. 1 shows a counterweight mounted in a receiver; in fig. 2 shows a simple diagram of a receiver using the proposed antenna, FIG. 3 is given an equivalent circuit, which serves to explain the principle of operation of the proposed antenna, and “FIG. four

shows a modified scheme for use with a dipole antenna and a two-way receiver.

As shown in FIG. 1, a counterweight mounted to the receiver, the zalgent of a short antenna, and in the receiver, interference compensation is automatically obtained. Grounding, if desired, be left.

The receiver input circuit is depicted in FIG. 2. Here, the antenna 5 is connected to one of the terminals of the primary coil via a variable capacitor 9. The other clip of this coil is connected to a weight / 5 that is mounted in and out, as shown in FIG. 1. The secondary coil 15 is located at the input of an amplifying or mixing lamp 17. A small capacitor 19 is connected between the receiver chassis and the antenna terminal of the coil 7.

FIG. 3 shows the equivalent circuit of the input circuit. Here, the antenna-ground capacitance is depicted by a capacitor 21. The effective capacitance of the earth antenna is made variable 1 by connecting a variable capacitor 9.

The capacitance between the pro / weight 13 and the ground is represented by a capacitor. Since the counterweight clamp

Katushka 7 "e is attached iieino means to the chassis, then there is a certain degree of sensitivity to the chassis.

The capacitance between the antenna clutch “Ol coil 7 and the chassis is usually smaller than that between the anti-grip clamp and the chassis, and therefore a small capacitor 19 is switched on in the circuit of the switch to equalize both capacitances.

Consider the diagram but FIG. 3, we see that when all the power values are chosen correctly and the scheme is not balanced, then the interference will not be fed to the coil 7, and, therefore, also to the wrong one.

Balancing is achieved by means of capacitance, for example, a capacitance (capacitor 9. The voltage of the device is induced by the a-line position: the coil 7 is pressed into the coaxial amp, and therefore the interference current does not flow through the coil 7.

iia FIG. 4 1 shown modified} yy. shsma In this order, a lable antenna 25 is used to receive its high frequency. The liptisMHHKa input circuit consists of a balanced but high frequency P & 27 coil 27, with an average. Attach & D through 11: Capacitor 29 li one clamp on the coil 5 /. The ends of the balckrack your katunzhi 27 are assigned to the input lines A,;: A. A. The second low-frequency tip

the primary coil 31 is connected to the 1 inlet terminal Ld. The fourth input terminal A is grounded. For junction A and A, a jumper 55 was provided.

A weight can be attached to an input terminal, although it is shown as an attachment to L3.

The attenuation of noMisx in this circuit is obtained by i; a high frequencies due to balancing the input satellite and the two Primary Drop wires from the dipole antenna 25. At 3 or 3 frequencies, the dipole 25 and the decrease act as a capacitive antenna, the signal from which goes to the primary coil 31. At low frequencies, the weakening of the gomer is achieved in a higher solubility by applying a counterweight.

Sometimes it is required that the acceptance work without anteshty. It is weakened and there is no interference at the same time, as a result of which it is possible only at close proximity: M reception, when there is no interference. If you attach a shield (SCC 13 to the terminal L | or AZ, and the terminal LZ is grounded, then you CAN get a satisfactory ;; this is a real pickup on the counterweight.

P r e d: vi e t p a t e t

An aptishum antenna, distinguished by its use as an iroi mount by mounting a grid that compensates for interference, using an aHTeiniK link that consists of one wire.

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