RU135454U1 - STABILIZED COMBINED ANTENNA DEVICE - Google Patents

Abstract

An antenna device comprising an irradiator and a reflector mounted on a platform including a rotation drive and a stabilization drive, characterized in that the irradiator contains a horn placed inside the common-mode array of two log-periodic vibrating antennas, and the antenna vibrators form an orthogonal structure; the reflector is a truncated paraboloid of revolution; the stabilization drive contains an upper frame, a lower frame and a crosspiece having two perpendicular axes, while the lower part of the upper frame is attached to one axis of the crosspiece with the possibility of rotation using the upper stabilization motor mounted on the upper frame with a gearbox, and the upper part of the lower frame is attached to the other the axis of the crosspiece with the possibility of rotation with the help of a stabilization motor fixed to the lower frame with a gearbox; on the upper frame of the stabilization drive, a rotation drive is fixedly mounted, comprising a housing, on top of which there is a base for the antenna, mounted rotatably around a vertical axis using a gear drive from a rotation motor.

Description

The utility model relates to structural elements of antennas, namely, devices for stabilizing antennas on an unstable platform.

A stabilized antenna device is known for guiding and automatically maintaining the direction of the antenna to a satellite under external destabilizing influences, for example, in the roll and motion of a vessel (see patent application RU 94025929, IPC H01Q 1/18). The device contains a directional antenna with fasteners, a platform, a gimbal, a stabilization gyro block, a rack, a slewing ring, a base, guidance electric drives, electronic components, a fairing, potentiometric sensors. The platform consists of two T-shaped rods, a horizontal rod is adapted for mounting the antenna with the possibility of rotation in elevation, and a vertical one for connecting with a gimbal and stabilization gyro block. The slewing ring is located outside the platform on the base and is connected to the platform through a rack and gimbal. Azimuthal pointing of the antenna occurs when the device rotates relative to the base. The stabilization gyro block has two gyromotors mounted within the framework of the cardan suspension and connected along the axis of kinetic moments by universal articulation, which, when precessing one, forces the second one to precess, but in the opposite direction, while their gyroscopic moments together compensate for the destabilizing effect on the platform.

The disadvantages of the known stabilized antenna device are a large mass due to the presence of hydraulic drives.

Closest to the claimed utility model is an antenna device designed to receive radio and television signals located on mobile carriers, such as pleasure boats, yachts, small merchant and passenger ships (see patent for invention RU 2173921, IPC H01Q 1/18) . The antenna device contains an antenna mounted on the rotary axis of the elevation angle of the triaxial cardan suspension, each of the axes of which is equipped with an engine and an angle sensor, and the motors and sensors of all three axes are connected to the automatic control system of the device, equipped with a pendulum platform suspended from the angle axis places, as well as the engine and the angle sensor of the pendulum platform about the axis of elevation. In addition, a two-coordinate angular velocity sensor and a two-axis linear acceleration sensor are installed on the pendulum platform. The engine and sensors are connected to the automatic control system of the device.

The disadvantages of the known antenna device are the need to use four engines to control the direction of the antenna. This device is taken as a prototype.

The objective of the claimed utility model is to create a device for stabilizing the antenna strictly in the horizontal plane when it is placed on a ship under rolling conditions.

The technical result consists in simplifying the design, increasing speed and, as a result, the accuracy of stabilization of the antenna.

The specified technical result is achieved in that the antenna device comprises an irradiator and a reflector mounted on a platform including a rotation drive and a stabilization drive, according to the solution, the irradiator contains a horn placed inside the common-mode array of two log-periodic vibrating antennas, and the antenna vibrators form an orthogonal structure; the reflector is a truncated paraboloid of revolution; the stabilization drive contains an upper frame, a lower frame and a crosspiece having two perpendicular axes, while the lower part of the upper frame is attached to one axis of the crosspiece with the possibility of rotation using the upper stabilization motor mounted on the upper frame with a gearbox, and the upper part of the lower frame is attached to the other the axis of the crosspiece with the possibility of rotation with the help of a stabilization motor fixed to the lower frame with a gearbox; on the upper frame of the stabilization drive, a rotation drive is fixedly mounted, comprising a housing, on top of which there is a base for the antenna, mounted rotatably around a vertical axis using a gear drive from a rotation motor.

The utility model is illustrated by drawings, where in Fig. 1 a general view of the inventive device is shown, in Fig. 2 is an irradiator, in Fig. 3 is a rotation drive, in Fig. 4 is a stabilization drive, in Fig. 5 is a mutual arrangement of stabilization motors and a cross . The positions in the drawings indicate:

1 - antenna device;

2 - platform;

3 - irradiator;

4 - reflector;

5 - frame;

7 - waveguide path;

8 - antenna;

9 - rotation drive;

10 - stabilization drive;

11 - case;

12 - base;

13 - rotation motor;

14 - upper frame;

15 - lower frame;

16 - a cross;

17 - upper stabilization motor;

18 - lower stabilization motor.

The utility model is intended for use as part of a radar station (radar) and a passive radar station (RLS) for emitting signals, receiving signals reflected from a target, receiving direct signals from radiating radars, as well as directional reception and transmission of signals in the frequency range of state recognition.

The inventive utility model contains an antenna device 1, mounted on a platform 2, and is designed based on the placement at the facility, for example a ship, under a radio-transparent superstructure (fairing) that protects the device from the effects of rain and wind.

The antenna device includes a multi-frequency irradiator 3 and a reflector 4, fixed relative to each other using a frame 5. The multi-frequency irradiator contains a horn 6, coupled to a microwave radiation source using a waveguide path 7, placed inside the common-mode array of two log-periodic vibrating antennas 8, and the antenna vibrators form orthogonal structure. Vibrator log-periodic antennas are connected to the transceiver via a coaxial path, which allows you to receive or emit microwave signals of arbitrary polarization. The reflector is a truncated paraboloid of revolution and is designed to concentrate the microwave energy emitted by the irradiator and to focus the microwave energy reflected from the target.

The platform is designed to be mounted on a ship and contains a rotation drive 9 and a stabilization drive 10. The rotation drive contains a housing 11, on top of which a base 12 is mounted that can be rotated around a vertical axis by means of a gear drive from a rotation motor 13, and the frame 5 of the antenna device 1. The stabilization drive contains an upper frame 14, a lower frame 15 and a cross 16 having two perpendicular axes, while the lower part of the upper frame is attached to one axis of the cross with rotation using the upper stabilization motor 17 with a gearbox mounted on the upper frame, and the upper part of the lower frame is attached to the other axis of the crosspiece with the possibility of rotation using the lower stabilization motor 18 with a gearbox mounted on the bottom frame. The housing of the rotation drive is fixedly mounted on the upper frame of the stabilization drive, and the lower frame of the stabilization drive is fixed on the ship. All three electric motors of the claimed device are the same, which simplifies the design, increases maintainability.

The rotation drive changes the direction of the antenna in azimuth. The coverage of the target search area is carried out in a circular or sectorial review of the space. A sector review is carried out by scanning the antenna radiation pattern in a limited sector or by providing radiation of probing signals only in a given search sector during circular rotation of the antenna.

The stabilization drive provides horizontal orientation of the plane of rotation of the antenna. In view of the fact that the antenna has a narrow radiation pattern in both planes, in order to maintain the maximum radar potential and increase direction finding accuracy, the device provides stabilization of the antenna in the angles of heel (Ө) and trim (Ψ) of the ship. The stabilization actuators are two stabilization drive motors.

Claims (1)

An antenna device comprising an irradiator and a reflector mounted on a platform including a rotation drive and a stabilization drive, characterized in that the irradiator comprises a horn placed inside the common-mode array of two log-periodic vibrating antennas, the antenna vibrators forming an orthogonal structure; the reflector is a truncated paraboloid of revolution; the stabilization drive contains an upper frame, a lower frame and a crosspiece having two perpendicular axes, while the lower part of the upper frame is attached to one axis of the crosspiece with the possibility of rotation using the upper stabilization motor mounted on the upper frame with a gearbox, and the upper part of the lower frame is attached to the other the axis of the crosspiece with the possibility of rotation with the help of a stabilization motor fixed to the lower frame with a gearbox; a rotation drive is fixedly mounted on the upper frame of the stabilization drive, comprising a housing, on top of which there is a base for the antenna, mounted rotatably around a vertical axis by means of a gear from a rotation motor.

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