RU117724U1 - SUBMARINE ANTENNA FEDERATION SYSTEM - Google Patents

Abstract

Antenna-feeder system for submarines, containing a switching device and an antenna made of conductors - insulated from water conductors, characterized in that the antenna conductors are made in the form of spiral longitudinal and transverse elements and are reinforced in a rubber anti-acoustic coating of the submarine hull with leads of insulated conductors to the switching a device inside a strong hull of a submarine, and the leads of the insulated conductors are connected in parallel with a phase-shifting device, a switching device and further with a radio receiving device.

Description

The utility model relates to the field of electro-radio engineering, in particular to the means of antenna devices used for communication with submerged submarines.

The radio conditions in seawater differ significantly from the radio conditions in air due to a number of specific features inherent in conductive media.

Field strength at large distances is thousands of times less than at small distances from the transmitting radio station. Consequently, even with powerful ultra-long-wavelength radio stations, the depths of the underwater radio reception will not be very large due to the additional attenuation of the radio signal in a conducting medium (sea water). To increase the depth of information reception, the submarine launches a towed cable antenna. The choice of antenna type depends on the specific conditions of its placement and operational requirements. The most common for underwater radio received towed cable antennas (A.V. Dodonov, A.F. Mikheev. Underwater radio M. Voenizdat 1996, p.190).

Known towed device (US patent No. 4455961, 1985, B 21/16). The towed cable is wound around the winch drum. The device comprises a semi-lock located next to the drum, which guides a cable made of steel wires.

The closest in purpose, technical nature and positive effect to the claimed device is an antenna for receiving ultra-low and low frequency signals in sea water (US patent No. 3.965.474 MKI H01Q 1/04), which contains a switching device, a loop antenna of conductors, placed into a non-conductive floating casing to which a protruding device is attached to reduce annular conduction currents around the antenna.

The disadvantages of both the analogue and the prototype are that the above antennas unmask the submarine and limit its maneuverability.

The purpose of the utility model is to eliminate the limitations of the maneuverability of the submarine and its unmasking.

This goal is achieved due to the fact that the antenna-feeder system containing the switching device, the antenna is made of conductors isolated from water, the conductors are made in the form of spiral longitudinal and transverse elements and are reinforced with a rubber anti-acoustic coating of the submarine’s hull with the leads of the isolated conductors to the switching the device inside the solid hull of the submarine, and the conclusions of the insulated conductors are connected in parallel with the phase-shifting device, switching m device and further with a radio receiver.

Figure 1 shows the General layout of the antenna-feeder device.

It contains: 1 - a solid submarine hull; 2 - spiral longitudinal insulated elements-conductors; 3 - transverse insulated elements-conductors.

Figure 2 presents a block diagram of a device.

It contains: 4 - phase shifting device; 5 - switching device, with the help of which an antenna pattern of the required form is formed; 6 - a radio receiver operating in the VLF-ELF range of wavelengths (≤30.0 Hz).

Antenna-feeder system operates as follows.

The signal is received on the longitudinal or transverse elements 2 and 3, reinforced in a rubber anti-acoustic coating of the hull of the submarine 1 and fed directly and through the phase shifting device 4, to the switching device, and then to the radio receiving device 6.

In the absence of a useful signal, the radio receiver 6 primarily records the noise of the submarine 1 (industrial interference) from multiple sources of interference inside the submarine 1. The recorded noise in antiphase is fed to the input of the radio receiver 6 through the switching device 4, realizing compensation, minimizing the noise level . The possibility of implementing such compensation is determined by the narrow passband of the radio receiver 6 and the long correlation time of interference due to this. With the advent of a useful signal, the switching device 4 searches for a switching circuit that gives the maximum signal at the output of the radio receiving device 6 due to the formation of the desired radiation pattern.

The possibility of forming the desired radiation pattern is provided by the proportionality of the elements of the system with the wavelength in sea water. For longitudinal elements (submarine length approximately 170 m) we have:

, λ = c / f, m

at f = 3 Hz, and σ- = 4 S / m, λ = 10 ⁸ m, λ _B = 913 m.

Thus, the formation of the antenna radiation pattern of the required type is ensured, and internal industrial interference is eliminated, while the necessary maneuverability of the submarine and its masking are ensured.

Claims (1)

Antenna-feeder system for submarines, containing a switching device and an antenna made of conductors - isolated from water cores, characterized in that the antenna conductors are made in the form of spiral longitudinal and transverse elements and are reinforced with a rubber anti-acoustic coating of the submarine's hull with the leads of the isolated conductors to the switching the device inside the solid hull of the submarine, and the conclusions of the insulated conductors are connected in parallel with the phase-shifting device and further with a radio receiver.