JP2001077615A - Radio beam rotation device and application device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotational radio beam rotation device by that which the energy loss of a radio beam is eliminated, and to provide the application device. SOLUTION: A radio beam rotation device reflects a transmission/reception beam transmitted/received by a transmission/reception port 1 only at one reflection face 4 and directs a prescribed radio beam 5 in a prescribed direction so as to rotate it. The transmission/reception beam 2 is transmitted/received in a constant direction (a) by the transmission/reception port 1. The reflection face 4 is arranged at an angle θ, which obliquely crosses the constant direction (a). An arm 6 which is arranged on a side opposite to the direction of the radio beam 5, with respect to the transmission/reception beams 2 and rotates with the constant direction (a) as a shaft center, supports the back side of the reflection face 4 and therefore the reflection face 4 is turned. An angle variable drive part 9 for changing the angle θ is installed on the back side of the reflection face 4. Since there is no object present in the path of the radio beam 5, a loss does not exist in the energy of radio waves. A radar device is exemplified as an application device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms a radio wave beam for transmitting or receiving or both transmitting and receiving (in the present invention, transmitting and receiving) a required radio wave beam and directing the beam in a required direction. The present invention relates to a radio wave beam turning device and a device using the same, for example, a radar device.

[0002]

2. Description of the Related Art Such a radio beam turning apparatus is mainly used for radars and the like, and there are the following prior arts.

[First Prior Art] A transmitting / receiving port for transmitting / receiving a radio wave beam is formed by an electromagnetic wrapper, that is, an electromagnetic horn, and a curved reflecting surface is provided opposite to the beam direction. While forming the radio wave to be transmitted and received outward to the required beam width, the electromagnetic horn and the reflecting surface are integrated, and the axis is set in the direction substantially orthogonal to the beam direction from the transmission and reception port, The configuration of a radio beam swivel device that turns a radio beam in a required direction by turning (hereinafter referred to as a first prior art) is described in the 28th edition of "Wireless Engineering Handbook" issued by Ohmsha on November 15, 1954. Radar, March 30, 1979, published by Ohmsha, "Electronic Communication Handbook," Vol. 26, disclosed by radio wave propagation and antennas.

[Second Prior Art] A horizontal beam width of a radio wave beam is formed by a transmitting / receiving port using a slot array, and a vertical beam width is formed by an inclined reflecting surface provided vertically and a slot array. The structure of a radio wave turning device (hereinafter, referred to as a second prior art) in which a device in which a beam and a reflecting surface are integrated and turned around an axis substantially perpendicular to the direction of the transmitted and received beams (hereinafter referred to as the second prior art) has been proposed. 7
No. 2911, for example.

[Third Prior Art] A circularly polarized wave reflecting surface for reflecting a radio wave beam, which converts a circularly polarized wave into a linearly polarized wave and vice versa. (Hereinafter referred to as a third prior art) is formed on a reflection surface that performs mutual conversion between light and linear polarization.
kindustr AB (SWEDEN) 19
It is disclosed by "RADAR TECHNIQUES" issued in 1978 and the like.

[Fourth Prior Art] As shown in FIG. 2, a fixed antenna device 21 for transmitting and receiving a transmitting / receiving beam 2 having an upward directivity and a radar set 22 are arranged on the ground, and the transmitting / receiving beam 2 And a rotating shaft 24 for rotating the reflecting surface 4 and rotating the radio wave beam 5 by rotating the reflecting surface 4 so as to protrude from the steel tower 25 to support the radio wave beam 5 having the horizontal directivity. Japanese Patent Application Laid-Open No. Sho 32-32 discloses a configuration in which the angle θ at which the reflecting surface 4 obliquely intersects the transmission / reception beam 2 is changed by an appropriate mechanism while being held by the frame 26. 8971
This is disclosed in Japanese Patent Application Publication No.

[Fifth Prior Art] As shown in FIG. 3, a transmitting / receiving port 1 for making a transmitting / receiving beam 2 a fixed direction, and two rotatable mounting portions 31 for holding the transmitting / receiving port 1 are provided. The arms 6 and 6A and the first reflecting surface 4 held by one arm 6 are arranged to face the transmission / reception beam 2, and the second reflecting surface 4A held by the other arm 6A is set to the first reflecting surface. 4, the transmission / reception wave beam 2 is reflected by the first reflection surface 4 so that the radio wave beam 5 </ b> A
Is further reflected by the second reflection surface 4A to direct a required radio wave beam 5 in a required direction, and the arm 6
Japanese Patent Laid-Open Publication No. Hei. 2-210 discloses a configuration in which the radio wave beam 5 can be rotated by rotating 6A and rotating the two reflecting surfaces 4.4A in a horizontal plane.
No. 219305 discloses this.

[Sixth Prior Art] As shown in FIG. 4, a transmitting / receiving port 1 and a reflecting surface 4 are integrally connected and provided, and by rotating these, a transmitting / receiving beam transmitted / received by the transmitting / receiving port 1 is formed. Japanese Patent Application Laid-Open No. 2-219305 and the like disclose a configuration (hereinafter referred to as a sixth conventional technique) in which the radio wave 2 is reflected by the reflection surface 4 to direct the radio wave beam 5 in a required direction.

[Seventh Prior Art] As shown in FIG.
The radio wave beam 5 is obtained by positioning the transmission / reception port 1 of the transmission / reception beam 2 provided at the upper end of the transmission / reception beam 1 at the middle of the reflection surface 4 arranged opposite to the transmission / reception port 1 and reflecting the transmission / reception port A configuration in which the radio wave beam 5 is turned by rotating the surface 4 integrally with the surface 4 (hereinafter, referred to as a seventh prior art) is disclosed in Japanese Patent Publication No. 51-20799.

[0010]

In the above-mentioned prior art, in order to turn the radio wave beam 5 by providing the reflecting surface 4 facing the transmitting / receiving port 1, the first prior art, the fourth prior art, and the fifth prior art are described.
Although the configurations of the prior art to the seventh prior art will be used,
These configurations have the following disadvantages.

In the configurations of the first prior art and the seventh prior art,
The transmission / reception port 1, for example, an electromagnetic horn is present in the path of the radio beam 5, and the waveguide 51 for transmitting radio waves to the transmission / reception port 1 and the portion holding the transmission / reception port 1 are the path of the radio beam 5. , The energy of the radio wave beam 5 is lost due to these objects.

In the structure of the fourth prior art, when the radio wave beam 5 turns and faces the direction of the tower 25, the tower 25 is present in the passage of the radio beam 5, so that the tower 25 Energy is lost.

In the configuration of the fifth prior art, since the arm 6 and the reflection surface 4 exist in the path of the radio wave beam 5, the arm 6
The energy of the radio wave beam 5 is lost by the reflection surface 4. Further, in the configuration of the sixth prior art, since the reflecting surface 4 and the transmitting / receiving port 1 are integrated, the radio wave is transmitted to the rotating waveguide portion 35 provided with the transmitting / receiving port 1 and the waveguide 35. It is necessary to provide a portion for making a rotational connection between the waveguide 36 on the fixed side for transmission, and the energy of radio waves is lost in this connection.

Therefore, in any case, the transmission / reception capability is reduced due to the energy loss of the radio wave as described above. For example, in the case of a radar device, there is a disadvantage that the detection capability is reduced. For this reason, there is a problem that it is desired to provide such a radio wave beam turning device and a device for using the device, such as a radar device, which are free from such inconvenience.

[0015]

According to the present invention, a transmission / reception beam of a radio wave transmitted / received by the transmission / reception port as described above is reflected by only one reflecting surface, so that a predetermined radio wave beam is directed in a predetermined direction and turned. In the radio wave beam turning device that

A fixed direction transmitting / receiving means for transmitting / receiving the transmitting / receiving beam in a predetermined direction by the transmitting / receiving port, and a reflecting surface arranging means for arranging the reflecting surface at an angle crossing the predetermined direction obliquely. The reflection surface is provided by supporting the back side of the reflection surface with an arm that is arranged on the opposite side to the direction of the radio wave beam with respect to the transmission / reception beam and that rotates about the fixed direction as an axis. A first configuration including a reflecting surface turning means for turning

In addition to the above-described first configuration, a second configuration in which a crossing angle varying means for providing a driving portion for changing the crossing angle on the back side, and a radar apparatus, The above problem is solved by the first configuration or the third configuration in which the second configuration is provided.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, an embodiment of a radar apparatus to which the radio wave beam turning device according to the present invention is applied will be described.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] An embodiment will be described below with reference to FIG. In FIG. 1, a transmitting / receiving port 1 is, for example, an electromagnetic horn, is placed in a fixed state, and has a fixed direction a in which a circularly polarized transmitting / receiving beam 2 is fixed, that is, as shown in FIG.
Waves are transmitted and received in a certain vertical direction a.

The transmission / reception circuit 3 transmits and receives radio waves connected to the transmission / reception port 1, for example, a pulse transmission power generated by a magnetron transmission circuit and supplied to the transmission / reception port 1 for transmission. This is a radar transmission / reception circuit in which a detection signal is obtained by a circuit for amplifying and detecting a reception signal of a reflected wave obtained by this transmission, and is placed in a fixed state similarly to the transmission / reception port 1.

The reflection surface 4 is, for example, a conductor reflection plate, and has an angle θ obliquely crossed with a fixed direction a of the transmitted / received beam 2 (this direction means a forward direction and an opposite direction).
And reflects the transmission of the transmission / reception beam 2 toward the reflection surface 4 to form a radio wave beam 5 in a required direction b, and transmits the radio wave received from the required direction b in the direction of the transmission / reception beam 2, that is, The light is reflected in a certain direction a.

The arm 6 is a support for supporting the reflection surface 4. As shown in the figure, the direction of the radio wave beam 5 with respect to the transmission / reception beam 2 does not interfere with the transmission / reception of the radio beam 5. It is arranged on the opposite side, and is held by the bearing portion 7 so as to turn about the fixed direction a as an axis.

The bearing portion 7 is a holding portion for turning the reflection surface 4 around the fixed direction a as an axis. For example, the outside of the waveguide c forming the transmission / reception path of the transmission / reception port 1 is a fixed axis d. And a rotating 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 e, and a turning drive unit 8 such as an electric motor is provided via the transmission mechanism g so that the reflection surface 4 rotates about a fixed direction a as an axis. It is structured as follows.

Therefore, if the reflecting surface 4 is appropriately rotated by the turning drive unit 8, the required direction b is turned in a plane orthogonal to the fixed direction a.

In other words, the configuration of the first embodiment is, in general, a predetermined radio wave beam 5 by reflecting the transmission / reception beam 2 of the radio wave transmitted / received by the transmission / reception port 1 by only one reflection surface 4. In a radio beam turning device that turns in a predetermined direction,

A fixed direction transmitting / receiving means for transmitting / receiving the transmitting / receiving beam 2 in the constant direction a by the transmitting / receiving wave port 1 and the reflecting surface 4 at an angle θ which obliquely intersects the constant direction a. Reflecting surface arranging means,

The fixed direction a is disposed on the opposite side of the transmission / reception beam 2 from the direction of the radio wave beam 5.
In the above-described first configuration, in which the reflecting surface turning means for turning the reflecting surface 4 by supporting the rear surface side of the reflecting surface 4 by the arm 6 turning about the axis 6 and the radar device, The above third configuration provided with the above first configuration.
And the configuration of the above.

[Second Embodiment] A second embodiment will be described below with reference to FIG. The second embodiment differs from the first embodiment in that a configuration for changing the angle θ of the reflection surface 4 is added.

In this configuration, as shown in FIG. 1, for example, an angle variable drive unit 9 in which a gear mechanism and a motor are combined is provided on the back side of the reflection surface 4, and drive power is supplied to the motor of the angle variable drive unit 9. For example, the rotating contact portion 10 to be provided is formed of a slip ring, and a required driving power is supplied from the reflection angle control portion 11 provided on the fixed side to change the angle θ. In a state where the driving power is not supplied, the circuit line passing through the rotary contact portion 10 is cut off so that electric noise from the slip ring is not generated.

In other words, the configuration of the second embodiment is, in general, in addition to the above-described first configuration, the above-described crossing angle θ is set on the back side, that is, on the back side of the reflecting surface 4. The above-described second configuration in which the driving portion to be changed, for example, the crossing angle variable means for providing the variable angle driving unit 9 is provided, and the third configuration in which the second configuration is provided in the radar apparatus. What constitutes.

[Modification] The present invention can be modified as follows. (1) The radio wave beam 5 is formed by forming the reflection surface 4 by a reflection surface for performing mutual conversion between circularly polarized wave and linearly polarized wave, for example, a reflecting surface as disclosed in the above-mentioned [Reference 5]. Can be transmitted and received by linearly polarized waves.

(2) A grid-like or mesh-like reflecting surface which reflects the reflecting surface 4 in correspondence with the polarization plane of the radio wave beam 5, for example, a reflecting surface disclosed in the above-mentioned [Reference 2]. Form with the surface.

(3) Reflection surfaces in which the reflection surface 4 is formed into an appropriate curved surface such as a parabolic curved surface or an arcuate curved surface, for example, disclosed in the above-mentioned [Reference 1], [Reference 2], and [Reference 3]. The radio wave beam 5 is formed to have a required beam width by forming such a reflecting surface.

[0035]

According to the present invention, as described above, all the components for holding, turning, and changing the angle of the reflecting surface are arranged on the opposite side of the direction of the radio wave beam with respect to the transmitted and received wave beams. Since there is no object that loses the energy of the radio wave in the path of the transmission and reception beam / radio beam because it is arranged, the radio beam turning device with improved transmission and reception capability and its use device, for example, the detection capability, There is an effect that a feature that can provide an improved radar device is obtained.

[Brief description of the drawings]

In the drawings, FIG. 1 shows an embodiment of the present invention, and FIGS.
Shows the prior art, and the contents of each figure are as follows.

FIG. 1 is a cross-sectional view of a main part and an overall arrangement diagram.

FIG. 2 is an overall layout diagram.

FIG. 3 is a sectional view of a main part and a configuration diagram of a main part arrangement.

FIG. 4 is a cross-sectional view of a main part and a configuration diagram of a main part.

FIG. 5 is a cross-sectional view of a main part and a configuration diagram of a main part 1. Rotary contact part 11 Reflection angle control part 21 Fixed antenna unit 22 Radar set 24 Rotation axis 25 Steel tower 26 Support frame 31 Holding part 35 Waveguide 36 Waveguide 41 Waveguide a Fixed direction b Required direction c Waveguide d Fixed Shaft e Bearing f Rotating cylinder g Electric mechanism θ Angle

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01Q 19/10 H01Q 19/10

Claims (3)

[Claims] 1. A radio beam turning device which turns a required radio beam in a required direction by reflecting a transmission / reception beam of a radio wave transmitted / received by a transmission / reception port only on one reflection surface, A fixed direction transmitting / receiving means for transmitting / receiving a transmitting / receiving beam in a predetermined direction by the transmitting / receiving port, a reflecting surface arranging means for arranging the reflecting surface at an angle crossing obliquely to the constant direction, And a reflecting surface turning means for turning the reflecting surface by supporting the back side of the reflecting surface by an arm which is arranged on the opposite side to the direction of the radio wave beam 5 and turns around the fixed direction as an axis. A radio wave beam turning device characterized by the above-mentioned. 2. The radio beam turning apparatus according to claim 1, further comprising a crossing angle varying unit provided on the back side with a driving portion for changing the crossing angle. 3. A radar device comprising the radio wave beam turning device according to claim 1.