JPH04277904A - Radio beam turning method - Google Patents

Abstract

PURPOSE:To simplify the jobs carried out in the manufacture and maintenance states by omitting a rotary coupled part to be instaled to an electronic circuit part in a radio beam turning method where the radio beams transmitted and received through a transmission/reception port are reflected on a reflecting surface so as to turn a desired radio beam in a desired direction. CONSTITUTION:The fixed transmission/reception devices 1 and 3 are provided to transmit and receive the radio transmission/reception beams in a fixed direction (a) through a transmission/reception port 1. The reflecting surface arrangement devices 6 and 7 are provided to arrange the reflecting surfaces 4 at an angle theta crossing obliquely the surfaces 4 to the direction (a) together with the reflecting surface turning devices 6, 7 and 8 which turn only the surfaces 4 with the direction (a) defined as an axial center.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention forms a radio wave beam for transmitting, receiving, or both transmitting and receiving (referred to as transmitting and receiving waves in this invention) into a required radio beam and directs it in a required direction. This invention relates to a radio beam turning method for directing.

0002

2. Description of the Related Art Such a radio beam turning method is mainly used in radar, and the following prior art techniques are available.

[Prior art 1] A transmitting/receiving port for transmitting and receiving a radio wave beam is formed by an electromagnetic horn, that is, an electromagnetic horn, and a curved reflecting surface is provided opposite to the direction of the beam. In addition to forming radio waves to be transmitted and received outward into a predetermined beam width, the electromagnetic horn and reflective surface are rotated around a direction that is approximately perpendicular to the direction of the beam from the transmitting and receiving aperture. The following literature discloses a method of rotating a radio wave beam in a desired direction by doing this. [Document 1] Special Publication No. 51-20799 [Document 2] 1962 Published by Seizando Shoten Co., Ltd. “Newly Revised Elementary Radar and Radio Engineering” [Document 3] March 30, 1979 Published by Ohmsha Co., Ltd. “
Electronic Communication Handbook, Volume 26 Radio Wave Propagation/Antennas

[
[Prior art 2] The horizontal beam width of a radio wave beam is formed by a transmitting/receiving port using a slot array,
A method in which the vertical beam width is formed by an inclined reflecting surface with a vertical beam width, and the slot array and the reflecting surface are integrated, and the beam is rotated around a direction that is almost orthogonal to the direction of the transmitted and received beam. is disclosed in the following documents. [Reference 4] Utility Model No. 63-72911

[Prior Art 3] A reflective surface that reflects a radio wave beam, and converts circularly polarized waves into linearly polarized waves, and conversely converts linearly polarized waves into circularly polarized waves. A method of forming a reflecting surface that performs mutual conversion with linearly polarized waves is disclosed in the following documents. [Reference 5] Philips Elektroniki
ndustrier AB company (SWEDEN) 1978
A technical document entitled "RADAR TECHNIQUES" published in 2013.

[0006]

[Problems to be Solved by the Invention] In the conventional radio beam turning method described above, the transmitting/receiving port itself has a rotating structure, while the transmitting/receiving circuit that connects the transmitting/receiving signal to the transmitting/receiving port is in a fixed state. Therefore, it is necessary to provide a rotary coupling part such as a rotary choke coupler or a rotary probe coupler between the wave transmitting/receiving port and the transmitting/receiving circuit. Since these rotating coupling parts are installed inside the equipment, there are inconveniences such as the equipment having to be disassembled for adjustments during manufacturing and inspection during maintenance.
There is a problem in that it is desired to provide a radio beam turning method that does not have these inconveniences.

[0007]

[Means for Solving the Problems] The present invention provides a radio wave that rotates by directing a desired radio wave beam in a desired direction by reflecting the transmitted/received beam of radio waves transmitted and received by the above-mentioned wave transmitting/receiving port on a reflecting surface. The beam rotation method includes a fixed direction transmission and reception in which the transmitted and received beam is transmitted and received in a fixed fixed direction by a transmitting and receiving wave aperture, a reflective surface arrangement in which a reflective surface is arranged at an angle diagonally intersecting the fixed direction, and the above-mentioned The above-mentioned problem can be solved by providing a reflection surface rotation in which only the reflection surface rotates about a certain direction as an axis.

[0008]

[Embodiment] Fig. 1 is a block diagram showing the configuration of a radar device to which a radio beam turning method according to an embodiment of the present invention is applied. circuit, 4 is a reflective surface, 5 is a radio beam, 6 is an arm,
7 is a bearing part, 8 is a turning drive part, 9 is a rotating contact part, and 10 is a variable angle drive part.

The wave transmitting/receiving port 1 is, for example, an electromagnetic horn, which is placed in a fixed state, and transmits and receives a circularly polarized wave transmitting/receiving beam 2 in a fixed direction a.

The wave transmitting/receiving circuit 3 is a circuit that transmits and receives radio waves connected to the wave transmitting/receiving port 1, such as a magnetron transmitting circuit, which generates pulsed transmission power and applies it to the wave transmitting/receiving port 1 to transmit the wave. This is a radar transmitting/receiving circuit in which a detection signal is obtained by a circuit that amplifies and detects the received signal of the reflected wave obtained by this transmitting wave, and is placed in a fixed state similarly to the transmitting/receiving port 1.

The reflective surface 4 is, for example, a reflective plate made of a conductor, and is arranged at an angle θ diagonally intersecting with a certain direction a (this direction means the positive direction and the opposite direction) of the transmitted and received beam 2. and reflects the transmitted wave of the transmitting/receiving beam 2 toward the reflecting surface 4 in the required direction b as the radio wave beam 5, and also reflects the radio wave received from the required direction b in the direction of the transmitting/receiving beam 2, that is, in a fixed direction a. do.

The arm 6 is a support for supporting the reflecting surface 4 with a bearing 7, and is disposed at a position so as not to interfere with the transmission and reception of the radio wave beam 5.

The bearing part 7 is a holding part for rotating the reflecting surface 4 about a certain direction a as an axis. The rotary cylinder f is held by a bearing e fitted on a fixed shaft d. A transmission mechanism g such as a gear is provided on the outer periphery of the rotary cylinder f, and a swing drive unit 8 such as an electric motor is provided via the transmission mechanism g, so that the reflective surface 4 is rotated about a certain direction a. It is rare. Therefore, if the reflecting surface 4 is appropriately rotated by the turning drive section 8, the required direction b can be changed to the fixed direction a.
The object is rotated in a plane orthogonal to the object.

The present invention can be modified and implemented as follows.

(A) A configuration for changing the angle θ of the reflecting surface 4 is added. As shown in FIG. 1, in this configuration, for example, a variable angle drive section 9 that combines a gear mechanism and an electric motor is provided on the back side of the reflective surface 4, and driving power is supplied to the motor of the variable angle drive section 9. Rotating contact part 10 for
is formed, for example, by a slip ring, and the angle θ at which the required driving power is applied is changed from the reflection angle control unit 11 provided on the fixed side, and this driving power is applied as necessary. In this state, the circuit line passing through the rotating contact portion 11 is cut off to prevent electrical noise from being generated from the slip ring.

(B) As shown in FIG. 2, the fixed side portion from the transmitter/receiver circuit 3 to the wave transmitter/receiver port 1 and the rotary drive portion that rotates the reflective surface 4 are separated from each other at opposing positions on a line in a fixed direction a. shall be established.

(C) In FIGS. 1 and 2, the reflective surface 4 is replaced by a reflective surface that mutually converts circularly polarized waves and linearly polarized waves, such as the one disclosed in the above-mentioned [Reference 5]. By forming such a structure, the radio wave beam 5 can be transmitted and received as a linearly polarized wave. Furthermore, by covering the periphery of the reflective surface 4 with a polarization plane filter, only linearly polarized beams are emitted and received.

(D) The reflecting surface 4 in FIGS. 1 and 2 is replaced with a lattice-like or mesh-like reflecting surface having a shape that reflects the radio wave beam 5 in accordance with the polarization plane, for example, as disclosed in the above-mentioned [Document 2]. Formed with a reflective surface like the one shown.

(E) A reflective surface formed by forming the reflective surface 4 in FIGS. 1 and 2 into an appropriate curved surface such as a parabolic curved surface or a circular arc curved surface, for example, the above-mentioned [Reference 1], [Reference 2], and [Reference 3] The radio wave beam 5 is formed with a reflecting surface such as that described in 1.

(F) The rotation of the radio wave beam 5 by the rotation drive unit in FIGS. 1 and 2 is configured to rotate continuously in all directions, or to rotate only in an arbitrary fan-shaped direction range, or , a configuration that rotates while being controlled to stop in a predetermined direction, or a combination of one or more of the following.

(G) As shown in FIG. 3, two systems A and B are provided with the wave transmitting/receiving port 1, the reflecting surface 4, and the rotating contact portion 9, and the wave transmitting/receiving port 1
In addition to emitting circularly polarized radio waves from A and 1B, the reflecting surface 4
By forming one of A and 4B with a half-wave plate and the other with a normal reflective surface, one reflective surface converts circularly polarized waves and linearly polarized waves, while the other reflective surface converts circularly polarized waves. The beam can be emitted as is, and the former is selectively activated during rainy weather, and the latter is selectively activated during sunny weather.

(H) In the configuration shown in FIG. 3, a function of converting circularly polarized waves and horizontally polarized waves is added to the reflecting surface 4A, and a converting function of circularly polarized waves and vertically polarized waves is added to the reflecting surface 4B. This achieves polarization diversity.

[0023]

According to the present invention, as described above, the electronic circuit part from the transmitter/receiver circuit 3 to the transmitter/receiver port 1 can be configured in a fixed state, and only the reflective surface part that rotates the radio wave beam can be configured in a rotating configuration. Therefore, there is no need to provide a rotational coupling part in the electronic circuit part. For this reason, there is an effect that complicated work such as disassembling the inside of the electronic circuit is not required when adjusting the rotating component of the radio wave beam during manufacturing or inspecting during maintenance.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram of main parts of an antenna device to which an embodiment of the present invention is applied.

FIG. 2 is a block diagram of a main part of a modified implementation of FIG. 1;

FIG. 3 is a block diagram of main parts of another modification of FIG. 1;

[Explanation of symbols]

1　　　　　　　　　　　　　 2 Transmission and reception beam 3 Transmission/reception circuit 4 Reflective surface 5 Radio beam 6 Arm 7 Bearing part 8 Swing drive part 9 Rotating contact part 10　　　　　　　　　　　　　Angle variable drive section.

Claims (5)

[Claims] 1. A radio beam turning method for directing and turning a desired radio wave beam in a desired direction by reflecting the transmitted/received beam of radio waves transmitted and received by a wave transmitting/receiving port on a reflecting surface, comprising: a. fixed direction transmission and reception of transmitting and receiving the transmission and reception beam in a fixed fixed direction by the transmission and reception wave opening; b. a reflective surface arrangement in which the reflective surface is arranged at an angle obliquely intersecting the certain direction; c. A method for rotating a radio wave beam, comprising: rotating only the reflecting surface about the certain direction as an axis. 2. The radio beam turning method according to claim 1, comprising a
．． circularly polarized wave transmitting/receiving that forms the transmitting/receiving beam with circularly polarized waves; b
．． A method for rotating a radio wave beam, comprising: forming the reflective surface in a plate shape. 3. The radio beam turning method according to claim 1, comprising:
A method for rotating a radio wave beam, comprising a variable crossing angle that changes the crossing angle. 4. The radio beam turning method according to claim 1, comprising:
a. circularly polarized wave transmitting/receiving that forms the transmitting/receiving beam with circularly polarized waves;
b. A method for rotating a radio beam, comprising: forming a conversion reflection surface in which the reflection surface is a reflection surface that performs mutual conversion between circularly polarized waves and linearly polarized waves. 5. The method according to claim 1, further comprising forming the reflecting surface by a curved surface that forms radio waves transmitted and received outward by the reflecting surface into a predetermined beam width. A radio beam turning method characterized by: