JP3155875B2 - Electron beam scanning antenna device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electron beam scanning antenna device, and more particularly to an electron beam scanning antenna device which is used for radar and satellite communication antennas and which has improved beam control technology.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional antenna structure in which, for example, an electron beam scanning antenna device covering the entire circumference in the azimuth direction is composed of four antenna surfaces and the surfaces are switched according to the directional azimuth direction. As an example, FIG. 5 (a) shows this as viewed from above, and FIG. 5 (b) shows this as viewed from the side with faces 3 and 4 facing the front. Also,
FIG. 6 shows a block configuration of the entire apparatus. In FIG. 5, reference numeral 1 denotes an antenna surface 1 on which a large number of element antennas are arranged on a trapezoidal inclined surface; , And 5 are element antennas constituting the respective antenna surfaces 1 to 4. Also, in FIG.
Is a variable phase shifter for setting the amount of phase with respect to the element antenna 5, and 7 is a variable phase shifter
And a combiner for combining outputs of the variable phase shifters 6 for shifting the phase of the received signal of the element antenna 5,
Reference numeral 4 denotes an antenna surface constituted by the element antenna 5, the variable phase shifter 6, and the combining / distributing device 7, and an amplifier for amplifying a received radio wave is provided as necessary. In addition, 8 connects a transmission signal to any one of the antenna surfaces 1 to 4 according to a switching signal from the beam control unit 9 and switches a reception signal of each antenna surface 1 to 4 from the beam control unit. A switch 9 for selecting and outputting one of the signals according to the signal. A switch 9 generates a switch signal for the switch 8 and sets the phase amount of the variable phase shifter 6 included in the antenna surfaces 1 to 4. It is a beam control unit.

Next, the operation will be described. The direction of the beam to be directed by the antenna is determined by the beam control unit 9, and the azimuth direction is 0 to 360 ° shared by the antenna surfaces 1 to 4.
In the case of 90 to 180 °, the surface 2 is 180 to 270 °
In the case of (2), the covering area is covered by the surface 3 and in the case of 270-360 °, the surface 4 is covered by the covering. For simplicity of explanation, it is assumed that the coverage area can be covered by performing beam scanning on one surface of each surface.

Since the switching timing of the surfaces 1 to 4 is determined when the beam control unit 9 determines the directivity, a desired surface is selected by controlling the switch 8. On the selected surface, the beam scanning sets the phase amount of each element antenna 5 by the variable phase shifter 6 and reaches each element antenna such that the wavefront is orthogonal to the radio wave from the target direction as shown in FIG. This is performed by giving a phase difference of the distance difference.

As described above, by controlling the phase shifter of each antenna surface and selecting the four antenna surfaces, it is possible to cover each coverage area in all directions.

[0006]

Since the conventional electron beam scanning antenna device is configured as described above, FIG.
For example, as shown in the conceptual diagram of FIG. 2, if the target direction is shifted by Δθ from the direction in which the target direction is equidistant with respect to the planes 1 and 2 with respect to the planes 1 and 2, A phase error △ φ results. In this case, Δφ = dsi
nΔθ.

Usually, the command value from the beam control unit is obtained by calculation from the position information of the target, the position of the present antenna device, the posture information of the moving body on which the present antenna device is mounted, and the like. An angle error occurs due to various factors such as a sensor error. For this reason, a phase jump due to the phase error occurs at the time of surface switching,
This is particularly problematic in coherent communication systems that require phase synchronization.

In this coherent communication system, as is well known, data is transmitted in synchronization with a clock, and the receiving side demodulates the data using a clock extracted from a received signal. At this point, data cannot be correctly demodulated. For this reason, in the antenna apparatus of the transmission / reception system using the same method such as satellite communication, if the phase jump is steep and large, there is a problem that deterioration of the line quality such as deterioration of the bit error rate and loss of synchronization is caused. .

As one method for solving such a problem, it is conceivable to prevent the bit error rate from deteriorating or out of synchronization by reducing the composite phase center distance d. If the antenna is made smaller or the surface division is increased in order to reduce d, there is a problem that the antenna gain on one surface is reduced and the desired performance cannot be obtained.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. An electron beam scanning antenna device capable of suppressing a phase jump even when an angle error exists and causing no performance deterioration. The purpose is to get.

[0011]

An electron beam scanning antenna device according to the present invention is mounted on a moving body and includes a target.
In the electron beam scanning antenna device to track, for selecting the multiple antenna portion having a plurality of variable phase shifters, each changing the phase of a plurality of element antennas and each antenna element, a plurality of antenna portions Switches and
A receiving unit for receiving an error signal from the antenna unit selected by the switch and outputting the reception level signal , and a position information and a posture information of the moving object;
Target direction angle obtained from target position information
Control the switch to select the antenna section, and set the phase amount of the variable phase shifter to
Beam direction so that the wavefront is orthogonal to the radio wave from
A beam controller for controlling the direction, bi and the beam control unit
Vibrated beam in the vicinity of the orientation of the over arm, than the reception level signal from the receiving unit at the time of its, the directivity direction of the beam
Detects angular errors in the target direction and
The direction command angle is corrected for angle error, and the angle error corrected
Control the beam controller based on the beam pointing direction command angle.
And a tracking processing unit for setting the phase amount of the variable phase shifter of each antenna unit .

Further, the electron beam scanning antenna device according to the present invention uses a receiving device using the present antenna device as a receiving unit for correcting the angle error.

Further, in the electron beam scanning antenna device according to the present invention, a lobe switch signal generator for generating a lobe switch signal whose polarity alternates and an offset are added to the tracking processing unit in synchronization with the lobe switch signal. An error detector for detecting an angle error of the beam using a reception level signal from the reception unit corresponding to the beam obtained, and the beam control unit adds a lobe switch signal to the beam command angle. It has an adder and a second adder for adding a signal based on the angle error to the output of the first adder.

[0014]

The electron beam scanning antenna apparatus according to the present invention detects an angle error between the target direction and the beam directing direction using the reception level signal before switching the antenna surface, and sets the beam pointing direction to "0". Since the antenna surface is switched after the direction is adjusted, it acts to reduce the phase jump due to this angle error.

Further, in the electron beam scanning antenna device according to the present invention, the receiving device for receiving and demodulating the original communication signal is used as a receiving portion for correcting the beam angle error. It is not necessary to provide a dedicated receiving unit only for the purpose.

Further, the electron beam scanning antenna apparatus according to the present invention adds an offset to a beam by a lobe switch signal which is constantly generated, and detects a beam angle error from an output of a receiving unit corresponding to the beam to which the offset has been added. Since this is corrected and the lobe switch signal is constantly generated, the correction is continuously performed, and the beam pointing direction command angle does not need to be highly accurate.

[0017]

【Example】

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an electron beam scanning antenna device according to one embodiment of the present invention. 6, the same reference numerals as those in FIG. 6 denote the same components. A receiving unit 10 receives a high-frequency signal from any one of the antenna surfaces 1 to 4 selected by the switch 8 and outputs a reception level signal.
Is a tracking processing unit using a lobe switch method for offsetting the beam to both polarities at high speed using the reception level signal from the reception unit 10 and detecting an angle error.

FIG. 2 is a diagram showing an error detection principle for detecting an angle error by a lobe switch method, and FIG. 3 is a diagram showing a pattern of a reference signal and an error signal detected by the same method. FIG. 4 is a block diagram showing a beam offset and angle error detection and angle error correction method using a lobe switch. In FIG. 4, reference numeral 9a denotes a lobe switch signal adder for adding a lobe switch signal of both polarities to the beam pointing direction command angle so that the beam has a small offset, and 9b denotes a lobe switch signal adder 9b.
an angle error corrector for correcting the angle error by adding the output of a and the output of the servo compensator 11b of the tracking processing unit 11;
Reference numeral 9c denotes a phase control amount calculator which calculates the phase control amount of the variable phase shifter 6 based on the output of the angle error corrector 9b and outputs the phase set value to the antenna surfaces 1 to 4. Also,
11a is an error detector for detecting an angle error in the direction of the target from the beam center based on the reception level signal for the beam A and the reception signal for the beam B from the receiving unit 10, and 11b is for the error detector 11a. A servo compensator 11c for performing servo compensation for stabilizing the control loop based on the angle error. A lobe switch signal generator that generates a lobe switch signal.

Next, the operation will be described with reference to FIGS. First, the direction of the beam to be directed by the antenna is determined by the beam control unit 9. In the azimuth direction, 0 to 360 ° is shared by the antenna surfaces 1 to 4. 1, 90 to 180 °, surface 2; 180 to 270 °, surface 3;
In the case of 360 °, the surface 4 covers the covered area. As in the conventional example, it is assumed that the coverage area can be covered in the elevation direction by performing beam scanning on one surface of each surface.

Since the switching timing of the planes 1 to 4 is determined when the directional direction is determined by the beam controller 9, a desired plane is selected by controlling the switch 8. On the selected surface, the beam scanning sets the phase amount of each element antenna 5 by the variable phase shifter 6 and reaches each element antenna such that the wavefront is orthogonal to the radio wave from the target direction as shown in FIG. This is performed by giving a phase difference of the distance difference. As described above, by controlling the phase shifter of each antenna surface and selecting the four antenna surfaces, it is possible to cover each coverage area in all directions.

The above operation is the same as that of the conventional example, but in this embodiment, the newly added receiving unit 10 and tracking processing unit 1
1 controls the beam controller 9 to perform error detection and angle error correction by the lobe switch method. By performing this error detection, the phase jump that occurs when the antenna surface is switched is suppressed. .

In the error detection by the lobe switch method, as shown in FIG. 2, an angle offset having an offset width (△ θs) is alternately applied in both polarities to the axial direction of the beam to be directed, and an offset position A and an offset position B are provided. , The respective received signal levels (VA and VB) are detected in synchronization with the lobe switch signal, the difference between the signal levels is calculated as an error signal (Vε), and the average value of both signal levels is used as a reference signal (VR). calculate. FIG. 3 shows the patterns of the reference signal and the error signal thus calculated.

Therefore, when the error signal (Vε) is normalized by the reference signal (VR), the target direction and the beam center are not influenced by the relative fluctuation of the reception level as shown in the equations (1) to (6). A normalized error signal proportional to the angle of deviation from the direction can be obtained.

The lobe switch signal generator 11c shown in FIG. 4 receives a signal from a gyro (not shown) for detecting a turning motion or the like of a moving body such as an aircraft equipped with the electron beam scanning antenna device, and turns the body to turn the antenna surface. If it is determined whether or not the time has reached the region where the switching of the antenna surface is required, and it is determined that the timing for switching the antenna surface has come, a lobe switch signal of both polarities is generated.

The error detector 11a synchronizes with the lobe switch signal and applies the following equation (1) to the received signal from the receiver 10.
To (6), a normalized error signal is obtained, and an angle error determined from the normalized error signal is output to the servo compensator 11b. In the servo compensator 11b, compensation processing for stabilizing the angle error correction loop is performed, and in the angle error corrector 9b, the angle error is corrected by superimposing it on the beam pointing direction command angle.
In accordance with the beam designation direction command angle for which the angle error correction has been performed, the phase control amount calculator 9c operates the antenna surfaces 1-4.
By setting the phase set value of the variable phase shifter described above, the angle error can be made zero.

As described above, if such a process is performed intermittently before switching the antenna plane, it is possible to prevent the bit error rate from being lowered due to the phase jump and the loss of synchronization. The normalized error signal and the normal error sensitivity are obtained by Gaussian approximation of the antenna pattern.

[0027]

(Equation 1)

[0028]

(Equation 2)

The reference signal (VR) and the error signal (Vε) are

[0030]

(Equation 3)

[0031]

(Equation 4)

The normalization error signal (VN) and the normalization error sensitivity (KS) are as follows.

[0033]

(Equation 5)

[0034]

(Equation 6)

Thus, if △ θs and θBw are determined,
The normalization error sensitivity has a constant value. That is, a normalized error signal proportional to the angle error can be obtained in the minute angle error range.

As described above, according to the above embodiment, the timing at which the surface switching of the antenna is required is predicted, and the beam is switched by the lobe switch method to reduce the angle error at the timing at which the surface switching is predicted to be required. By detecting and correcting the beam command angle based on this angle error, the phase set value of the variable phase shifter forming the antenna surface is changed, so that even if an angle error exists, the phase jump will occur. It is possible to prevent a reduction in bit error rate and loss of synchronization, and to obtain an electron beam scanning antenna device that does not cause performance degradation.

Embodiment 2 FIG. Note that, in the above embodiment, in order to obtain a reception level signal from a reception signal from the antenna surface, for example, an example in which a dedicated reception unit is provided as a case where a beacon signal from a target is received,
The reception unit may use a reception unit that receives and demodulates a communication signal. In this case, the AGC signal of the reception unit may be output to the tracking processing unit as a reception level signal.

Thus, by using the communication signal receiving unit originally provided in the electron beam scanning antenna device and inputting the reception level signal to the tracking processing unit, the first embodiment is achieved.
Similarly to this, the tracking processing section can perform arithmetic processing so as to correct the beam pointing angle error, can reduce the phase jump without providing a dedicated receiving circuit for beam correction, and can make the apparatus simple and inexpensive. Can be configured.

Embodiment 3 FIG. Further, in the above embodiment, the example in which the angle error correction by the lobe switch method is intermittently performed before switching the antenna surface to reduce the phase jump has been described. However, the angle error correction by the lobe switch method is always continuous. May go.

FIG. 8 is a block diagram showing the configuration of this embodiment. In this embodiment, a lobe switch signal generator 11d that constantly generates a lobe switch signal is provided instead of the lobe switch signal generator 11c that generates the lobe switch signal intermittently in FIG.

Next, the operation will be described with reference to FIGS. 1 to 3 and FIG. First, the direction of the beam to be directed by the antenna is determined by the beam control unit 9. In the azimuth direction, 0 to 360 ° is shared by the antenna surfaces 1 to 4. 1, 90-180
°, surface 2; 180-270 °, surface 3.
In the case of 270-360 °, the surface 4 covers the covered area. As in the conventional example, it is assumed that the coverage area can be covered in the elevation direction by performing beam scanning on one surface of each surface.

Since the switching timing of the surfaces 1 to 4 is determined when the directional direction is determined by the beam controller 9, a desired surface is selected by controlling the switch 8. On the selected surface, the beam scanning sets the phase amount of each element antenna 5 by the variable phase shifter 6 and reaches each element antenna such that the wavefront is orthogonal to the radio wave from the target direction as shown in FIG. This is performed by giving a phase difference of the distance difference. As described above, by controlling the phase shifter of each antenna surface and selecting the four antenna surfaces, it is possible to cover each coverage area in all directions.

The above operation is the same as that of the conventional example, but in this embodiment, the newly added receiving unit 10 and tracking processing unit 1
1 controls the beam controller 9 to perform error detection and angle error correction by the lobe switch method. By performing this error detection, the phase jump that occurs when the antenna surface is switched is suppressed. .

The lobe switch signal generator 11d shown in FIG. 8 always generates a lobe switch signal having both polarities, and the error detector 11a synchronizes with the lobe switch signal to generate the lobe switch signal.
By calculating the equations (1) to (6) with respect to the received signal from 0, a normalized error signal is obtained, and an angle error determined from the normalized error signal is output to the servo compensator 11b. In the servo compensator 11b, compensation processing for stabilizing the angle error correction loop is performed, and in the angle error corrector 9b, the angle error is corrected by superimposing it on the beam pointing direction command angle. By setting the phase set value of the variable phase shifters of the antenna surfaces 1 to 4 by the phase control amount calculator 9c in accordance with the beam designation direction command angle for which the angle error has been corrected, the angle error is made zero. Can be.

In the error detection by the lobe switch method, as shown in FIG. 2, an angular offset of an offset width (△ θs) is alternately applied in both polarities to the axial direction of the beam to be directed, and an offset position A and an offset position B are provided. , The respective received signal levels (VA and VB) are detected in synchronization with the lobe switch signal, the difference between the signal levels is calculated as an error signal (Vε), and the average value of both signal levels is used as a reference signal (VR). calculate. FIG. 3 shows the patterns of the reference signal and the error signal thus calculated.

Therefore, when the error signal (Vε) is normalized by the reference signal (VR), the target direction and the beam center are not affected by the relative fluctuation of the reception level as shown in the equations (1) to (6). A normalized error signal proportional to the angle of deviation from the direction can be obtained.

The lobe switch signal generator 11d shown in FIG. 8 generates a lobe switch signal having both polarities. Error detector 1
1a is synchronized with this lobe switch signal,
By calculating the equations (1) to (6) with respect to the received signal from, a normalized error signal is obtained, and an angle error determined from the normalized error signal is output to the servo compensator 11b.
In the servo compensator 11b, compensation processing for stabilizing the angle error correction loop is performed, and in the angle error corrector 9b, the angle error is corrected by superimposing it on the beam pointing direction command angle. By setting the phase setting value of the variable phase shifters of the antenna surfaces 1 to 4 by the phase control amount calculator 9c according to the beam designation direction command angle subjected to the angle error correction, the angle error is made zero. Can be. The normalized error signal and the normal error sensitivity are obtained by Gaussian approximation of the antenna pattern.

[0048]

(Equation 7)

[0049]

(Equation 8)

The reference signal (VR) and the error signal (Vε) are

[0051]

(Equation 9)

[0052]

(Equation 10)

The normalized error signal (VN) and the normalized error sensitivity (Ks) are

[0054]

[Equation 11]

[0055]

(Equation 12)

Thus, if れ ば θs and θBw are determined,
The normalization error sensitivity has a constant value. That is, a normalized error signal proportional to the angle error can be obtained in the minute angle error range.

As described above, according to the above-described embodiment, the angle error is detected by always switching the beam by the lobe switch method, not only at the timing when the antenna surface switching is required, and based on this angle error. By correcting the beam command angle, the phase set value of the variable phase shifter constituting the antenna surface is changed. Therefore, as in the first embodiment, even if an angle error exists, the bit due to the phase jump is changed. An electron beam scanning antenna device that can prevent a reduction in error rate and loss of synchronization and that does not cause performance degradation can be obtained.

In this embodiment, since the lobe switch signal generator always generates the lobe switch signal, it is predicted and determined whether or not the antenna surface switching timing is reached as in the first embodiment. Logic is not required, and the circuit of the lobe switch signal generator can be downsized.

Further, in the third embodiment, since the correction is continuously applied, the tracking accuracy for directing the beam toward the target depends on the tracking accuracy of the lobe switch method, and the position information of the target and the antenna device of the present invention are used. It is not necessary to increase the accuracy of the beam pointing direction command angle obtained by calculation from position and orientation information as compared with the conventional device, and the accuracy of a sensor that obtains such information can be greatly reduced, and the device can be simplified. The effect is obtained.

Embodiment 4 FIG. Also, in the configuration of the third embodiment, similarly to the second embodiment, a dedicated reception unit for beam correction is not provided, but a reception unit for receiving a communication signal originally provided in the antenna apparatus is provided. The reception level signal of the apparatus may be used, and thereby, without increasing the apparatus scale of the reception system or the circuit scale of the lobe switch signal generator or obtaining a highly accurate beam pointing direction command angle. This has the effect that beam correction can be performed when the antenna surface is switched.

[0061]

As described above, according to the present invention, the moving
An electron beam scanning device mounted on the body to track the target
In antenna device, a multiple antenna portion having a plurality of variable phase shifters, each changing the phase of a plurality of element antennas and each antenna element, and a switch for selecting a plurality of antenna units, the switch Receiving a signal from the selected antenna unit, a receiving unit for angle error correction that outputs the reception level signal , position information of the moving body,
Obtained from posture information and position information of the target to be tracked
Based on the beam pointing direction command angle, the switch is controlled to select the antenna unit, and the phase amount of the variable phase shifter
To set the wavefront to
A beam controller that controls the directivity direction of the beam to intersect each, and a beam control unit vibrated beam in the vicinity of the pointing direction of the beam, the reception level signals from the receiver during its
The angle error between the beam direction and the target direction.
Detects and corrects beam pointing direction command angle for angle error
Based on the angle-corrected beam pointing direction command angle.
Control the beam controller, and change the phase shifter of each antenna
And a tracking processing unit that sets the phase amount of
Since the signal from the antenna is received and demodulated by the receiver and the received signal is used to detect the angle error between the target direction and the beam direction by the tracking processing unit, and adjusts the beam direction optimally. When switching an element antenna surface with an element block composed of a plurality of element antennas as one unit, the phase jump can be suppressed small, and the effect of obtaining an electron beam scanning antenna device that does not cause performance degradation when switching the antenna surface can be obtained. is there.

Further, according to the present invention, the receiving device using the present antenna device is used as the receiving portion for angle correction, so that the receiving device for the communication signal originally provided in the electron beam scanning antenna device is used. The apparatus can also be used as a receiving section for beam correction, and there is an effect that a dedicated receiving section only for beam correction can be omitted and the apparatus can be configured simply and inexpensively.

According to the present invention, the tracking processing unit includes
A lobe switch signal generator for generating a lobe switch signal having alternating polarities, and a receiver corresponding to a beam having an offset added in synchronization with the lobe switch signal
An error detector for detecting an angle error of the beam using the reception level signal from the first controller, a first adder for adding the lobe switch signal to the beam command angle in the beam controller, and a signal based on the angle error. And a second adder that adds the offset to the output of the first adder, adds an offset to the beam by a lobe switch signal, and obtains the beam angle from the output of the receiving unit corresponding to the offset-added beam. Since the error is detected and corrected, and the lobe switch signal is always generated, the beam is continuously corrected, and the beam pointing direction command angle does not need to be high precision. There is an effect that the configuration of a sensor or the like for obtaining the direction command angle is simple.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electron beam scanning antenna device according to a first embodiment of the present invention.

FIG. 2 is a principle diagram of an angle error detection of a lobe switch system according to a first embodiment of the present invention.

FIG. 3 is a pattern diagram of a reference signal and an error signal of the lobe switch system according to the first embodiment of the present invention.

FIG. 4 is a block diagram showing a beam offset and angle error detection / correction unit of the electron beam scanning antenna device according to the first embodiment of the present invention.

FIG. 5 is a block diagram showing an antenna unit of a conventional electron beam scanning antenna device.

FIG. 6 is a block diagram showing a conventional electron beam scanning antenna device.

FIG. 7 is a diagram showing a phase error of a conventional electron beam scanning antenna.

FIG. 8 is a block diagram showing a beam offset and angle error detection / correction unit of an electron beam scanning antenna device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antenna surface 1 2 Antenna surface 2 3 Antenna surface 3 4 Antenna surface 4 5 Element antenna 6 Variable phase shifter 7 Synthetic distributor 8 Switcher 9 Beam controller 9a Lobe switch signal adder 9b Angle error corrector 10 Receiver 11 Tracking processing unit 11a Error detector 11d Lobe switch signal generator

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masatoshi Sugano 50 Matsuhidai, Matsudo-shi, Chiba 3-506, Japan Defense Agency 3-506 (72) Inventor Tomio Ito 8-1-1 Honcho Tsukaguchi, Amagasaki-shi, Hyogo Mitsubishi Electric Corporation (56) References JP-A-4-242302 (JP, A) JP-A-5-152826 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01Q 3/00 -3/46 G01S 3/44 G01S 7/02

Claims (3)

(57) [Claims] 1. A target mounted on a moving object to track a target
That in an electron beam scanning antenna device, a multiple antenna portion having a plurality of variable phase shifters, each changing the phase of a plurality of element antennas and each antenna element, for selecting said plurality of antenna portions A switch, a receiving unit for receiving a signal from the antenna unit selected by the switch, and outputting a reception level signal thereof, for correcting an angular error ; and positional information, attitude information, and a tracking target of the moving object.
Based on the beam pointing direction command angle obtained from the
There are, as well as selecting the antenna unit by controlling the switch, by setting the phase amount of the variable phase shifter target
Beam so wavefronts perpendicular to radio waves from directions
A beam controller for controlling the pointing direction, and the beam controller vibrated beam in the vicinity of the pointing direction of the beam, received from the receiver during its level
From Le signal, directivity direction and the target direction of the beam
Directional angle error is detected and the beam
Angle error correction for command angle, beam pointing corrected for angle error
By controlling the beam controller based on the direction command angle,
A tracking processing unit for setting a phase amount of a variable phase shifter of each antenna unit . 2. The electron beam scanning antenna device according to claim 1, wherein a receiving device using the present antenna device is used as a receiving unit for correcting the angle error. 3. The electron beam scanning antenna device according to claim 1, wherein the tracking processing unit includes a lobe switch signal generator that generates a lobe switch signal whose polarity alternates, and a lobe switch signal generator that synchronizes with the lobe switch signal. The reception level signal from the receiver corresponding to the beam to which the offset has been added.
And a error detector for detecting an angle error of the beam using a No., the beam control unit, first for adding said lobes switch signal to the beam command angle
An electron beam scanning antenna device, comprising: an adder of (1) and a second adder for adding a signal based on the angle error to an output of the first adder.