JP2003023383A - Variable beam antenna system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable beam antenna system which can flexibly deal with various installation environments (communication areas). SOLUTION: This system has a low frequency band oscillator 30, an intermediate frequency(IF) band oscillator 25 and a low frequency band amplitude/phase controller 31, an amplitude and a phase are controlled in a low frequency band outputted from the low frequency band oscillator 30 by the low frequency band amplitude/phase controller 31, the frequency is converted to a high frequency band by multiplying this low frequency band and an IF band outputted from the IF band oscillator, and power is fed to an antenna element 28a of an array antenna. Besides, this system has a distributor/synthesizer, an amplitude/phase variable antenna power feeding circuit having a plurality of amplitude varying circuits and phase varying circuits for feeding power to the antenna element of the array antenna while changing the amplitude and phase of power distributed by this distributor/synthesizer, and an amplitude/phase control circuit for controlling the amplitude varying circuits and the phase varying circuits.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable beam antenna device, and is useful when applied to an ERP (Electronic Road Pricing) system or the like.

[0002]

2. Description of the Related Art Non-stop toll road toll collection system (ELectoronics TollCollection: ET) using wireless communication
The trial operation of C) has started. This system is 5.8
Is obtained by using radio waves of GH _Z, roadside device installed in the roadside and (roadside antenna device), and a vehicle-mounted device mounted on the vehicle and the data transmission by radio, the vehicle-mounted device or OBE Rates It is a method of removing from the IC card to be inserted into.

FIG. 21 is a block diagram of a roadside antenna device in a conventional ETC system, and FIG. 22 is a block diagram of an antenna feeding circuit in the roadside antenna device.

In FIG. 21, a roadside antenna device 3 is installed on a gantry, which is a gate-shaped support strut installed across a road, and a control board rack 1 containing an antenna control board 2 is installed.
Will be installed inside the booth of the toll booth or inside the enclosure installed on the roadside. A communication control circuit 4 is provided in the roadside antenna device 3, and the communication control circuit 4 performs data communication with the antenna control board 2 and performs transmission / reception control.

[0005] When transmitted from the roadside antenna apparatus 3 to the vehicle-mounted device, in the modulation circuit 5, modulated by the transmission data carrier of high frequency output from the high frequency band oscillator 6 5.8GH _Z, the modulated wave After being amplified by a transmission amplifier 6 and passed through a bandpass filter 8 having a pass band of 5.8 GHz _Z band, a large number of antenna elements 11a are two-dimensionally arranged through an antenna switching circuit 8 and an antenna feeding circuit 10. The signals are transmitted from the array antenna 11 arranged in the. In addition, the radio wave transmitted from the vehicle-mounted device is transmitted to the roadside antenna device 3
When receiving with the array antenna 11
In receiving, via an antenna feeding circuit 10 and an antenna switching circuit 9, passed through a bandpass filter 12 having a pass band of 5.8GH _Z band, amplified by the receiving amplifier 13, a high frequency band oscillator demodulation circuit 14 By demodulating based on the high frequency from 6, the reception data from the vehicle-mounted device is obtained.

As shown in FIG. 22, the array antenna 11
Forms an antenna beam by combining radio waves radiated from each antenna element 11a. Then, in order to form a desired antenna beam, the antenna feeding circuit 10 controls the amplitude and phase of the microwave that feeds each antenna element 11a of the array antenna 11. The antenna feeding circuit 10 includes a distributor / combiner 15 and a microwave transmission line 16 for phase control.
The power distribution amount (amplitude of microwave) of the microwave supplied to each antenna element 11a is controlled by 5, and the phase of the microwave supplied to each antenna element 11a is controlled by changing the length of the microwave transmission line 16. .

[0007]

However, in a free-flow type road charging system aimed at alleviating traffic congestion in urban areas, a variable beam antenna device capable of flexibly responding to diversified antenna installation environments and communication areas is required. However, the current roadside antenna device 3 having a fixed beam pattern (fixed beam) is not suitable.

For example, it is estimated that there are hundreds of antenna installation locations for the ERP system currently planned in a large city, but the installation environment varies according to the back alley, under the overpass, and the number of lanes. Therefore, the required beam pattern (communication area) also varies depending on the installation environment. For example, in the installation place as shown in FIG.
3m x 3m communication area 17 corresponding to one lane charging lane
On the other hand, in the installation location as shown in FIG. 23B, the communication area 18 of 6 m × 6 m corresponding to the charging lane of two lanes is required. It is not a good idea to develop and design a fixed beam roadside antenna device that is suitable for each installation environment in terms of cost and construction period.

Therefore, the present invention has been made in view of such circumstances.
An object of the present invention is to provide a variable beam antenna device that can flexibly cope with various installation environments (communication areas).

[0010]

[Means for Solving the Problems] First to solve the above problems
A low frequency band oscillator, an intermediate frequency band oscillator, and a low frequency band amplitude controller of the invention are provided, and the amplitude is controlled by the low frequency band amplitude controller in the low frequency band output from the low frequency band oscillator. It is characterized in that the frequency band and the intermediate frequency band output from the intermediate frequency band oscillator are multiplied to perform frequency conversion into a high frequency band and feed the antenna element of the array antenna.

The variable beam antenna apparatus of the second invention has a low frequency band oscillator, an intermediate frequency band oscillator, and a low frequency band phase controller, and the low frequency band oscillator outputs the low frequency band output signal from the low frequency band oscillator. The phase is controlled by the frequency band phase controller, and the low frequency band and the intermediate frequency band output from the intermediate frequency band oscillator are multiplied to convert the frequency to the high frequency band and feed the antenna element of the array antenna. It is characterized in that it is configured as follows.

A variable beam antenna apparatus according to a third aspect of the present invention has a low frequency band oscillator, an intermediate frequency band oscillator, and a low frequency band amplitude / phase controller, and outputs in the low frequency band output from the low frequency band oscillator. The amplitude and phase are controlled by the low frequency band amplitude / phase controller, and the low frequency band and the intermediate frequency band output from the intermediate frequency band oscillator are multiplied to convert the frequency to the high frequency band, and the array antenna It is characterized in that it is configured to feed power to the antenna element.

The variable beam antenna apparatus of the fourth invention comprises a distributor / combiner and a plurality of amplitude variable circuits for changing the amplitude of the power distributed by the distributor / combiner and feeding the antenna elements of the array antenna. It is characterized in that it has an amplitude variable antenna feeding circuit having the same and an amplitude control circuit for controlling the amplitude variable circuit.

The variable beam antenna apparatus of the fifth invention comprises a distributor / combiner and a plurality of phase variable circuits for changing the phase of the power distributed by the distributor / combiner to feed the antenna elements of the array antenna. And a phase control circuit for controlling the phase variable circuit.

The variable beam antenna apparatus according to the sixth aspect of the invention comprises a distributor / combiner and a plurality of variable amplitudes for changing the amplitude and phase of the power distributed by the distributor / combiner to feed the antenna elements of the array antenna. An amplitude / phase variable antenna power feeding circuit including a circuit and a phase variable circuit,
An amplitude / phase control circuit for controlling the amplitude variable circuit and the phase variable circuit is provided.

A variable beam antenna apparatus according to a seventh aspect of the invention is the variable beam antenna apparatus according to the fourth or sixth aspect of the invention, which has an amplitude correction table for correcting variations in amplitude control characteristics of the amplitude variable circuit. In the amplitude control circuit or the amplitude / phase control circuit, by controlling the amplitude variable circuit based on the amplitude correction table,
Variations in the amplitude control characteristics of the amplitude variable circuit are corrected.

The variable beam antenna apparatus according to the eighth aspect of the present invention is the variable beam antenna apparatus according to the fourth, sixth or seventh aspect, wherein a phase amount that adversely changes when the amplitude is changed by the amplitude changing circuit. A phase correction table for correction is provided, and the amplitude control circuit or the amplitude / phase control circuit corrects the phase amount by controlling the phase variable circuit or the phase correction circuit based on the phase correction table. It is characterized by doing.

A variable beam antenna apparatus according to a ninth aspect of the present invention is the variable beam antenna apparatus according to the fourth, fifth, sixth, seventh or eighth aspect, for correcting a phase difference due to a difference in transmission path length. A transmission path length phase correction table is provided, and the amplitude control circuit, the phase control circuit, or the amplitude / phase control circuit controls the phase variable circuit or the phase correction circuit based on the transmission path length phase correction table. Is used to correct the phase difference.

The variable beam antenna apparatus according to the tenth invention is the variable beam antenna apparatus according to the fourth, sixth, seventh or eighth invention, wherein the amplitude variable circuit has a diode. The amplitude of the electric power passing through the diode is controlled by controlling the current flowing through the diode by the control voltage from the amplitude control circuit or the amplitude / phase control circuit.

The variable beam antenna apparatus according to the eleventh invention is the variable beam antenna apparatus according to the fifth, sixth, seventh or eighth invention, wherein the phase variable circuit is for varying a plurality of phase values having different lengths. The transmission line is connected to the main transmission line in parallel via a connection changeover switch.

The variable beam antenna apparatus according to the twelfth invention is the variable beam antenna apparatus according to the fourth, sixth, seventh or eighth invention, wherein the amplitude variable circuit comprises a plurality of attenuators having different attenuation amounts, It is characterized in that it is connected in parallel with the transmission line via a connection changeover switch.

The variable beam antenna apparatus according to the thirteenth invention is the fourth, fifth, sixth, seventh, eighth, ninth, tenth,
In the variable beam antenna device according to the eleventh or twelfth aspect of the invention, the antenna element of the array antenna is divided into a plurality of blocks, and the amplitude variable circuit or the phase variable circuit is divided by a distributor / combiner for the antenna elements belonging to the same block. It is characterized in that it is configured to supply power of the same amplitude or phase or the same amplitude and phase controlled by the amplitude variable circuit and the phase variable circuit.

The variable beam antenna apparatus of the fourteenth invention is the variable beam antenna apparatus of the fifth or sixth invention, wherein a radio wave reflector is mounted in front of the antenna element, and the radio wave reflector radiates from the antenna element. The reflected radio wave is received by the same antenna element, the received radio wave is compared with the high frequency output from the high frequency band oscillator, the phase of the received radio wave is detected, and the phase is corrected based on this detected phase value. It is characterized by creating a table.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Embodiment 1> FIG. 1 is a block diagram of a roadside antenna apparatus (variable beam antenna apparatus) according to Embodiment 1 of the present invention, and FIG. 2 is an explanatory view of a frequency conversion system in the variable beam antenna apparatus. is there.

In FIG. 1, a roadside antenna device 21 which is a variable beam antenna device is installed on a gantry which is a gate-shaped support strut provided so as to straddle a road, and a control board rack 23 accommodating an antenna control board 22 is installed on the roadside. It is provided inside the installed housing. A communication control circuit 24 is provided in the roadside antenna device 21, and the communication control circuit 24 performs data communication with the antenna control board 22 and performs transmission / reception control.

When transmitting from the roadside antenna device 21 to the vehicle-mounted device, the modulation circuit 26 modulates the intermediate frequency carrier wave output from the intermediate frequency band oscillator 26 with the transmission data, and the modulated wave is distributed by the distributor 27. , And is distributed to a mixer 29 as a frequency conversion means provided for each antenna element 28a forming the array antenna 28.
The array antenna 28 includes a large number of antenna elements 11a.
Are arranged two-dimensionally, but only three antenna elements 28a are illustrated in the illustrated example.

The mixer 29 up-converts (frequency-converts) the modulated wave into a high frequency band by mixing the modulated wave of the intermediate frequency and the low frequency output from the low frequency band oscillator 30. At this time, the low frequency output from the low frequency band oscillator 30 is input to the mixer 29 after being controlled by the low frequency band amplitude / phase controller 31 to have a predetermined amplitude and phase for each antenna element 28a.
The low frequency band amplitude / phase controller 31 can be configured by a low frequency analog circuit or a D / A converter.

The high frequency band modulated wave output from the mixer 29 is amplified by the transmission amplifier 32 and then input to the bandpass filter 34 via the changeover switch 33.
The changeover switch 33 is switched by the communication control circuit 24 between transmission and reception and reception. Bandpass filter 34
Holds the amplitude / phase information controlled in the low frequency band, has a steep pass band characteristic in the high frequency band, and passes only the necessary frequency band (high frequency band) shown in FIG. In FIG. 2, fl is a low frequency band output from the low frequency band oscillator 30 for easy amplitude / phase control, fm is an intermediate frequency band output from the intermediate frequency band oscillator 25, and f is
m-fl is an unnecessary frequency band output from the mixer 29. Fm + fl is a required radio frequency band (high frequency band) output from the mixer 29.

The signal that has passed through the bandpass filter 34 is supplied to each antenna element 28a of the array antenna 28, and is radiated from these antenna elements 28a to form a desired beam pattern (communication area). That is, in the roadside antenna device 21, amplitude / phase control is performed in a low frequency band that is easy to control, and the low frequency and intermediate frequency modulated waves are multiplied by the mixer 29 to up-convert the modulated wave to a high frequency band. By doing so, radio waves are vector-synthesized in a high frequency band to obtain a desired beam pattern (communication area).

On the other hand, when the radio wave transmitted from the vehicle-mounted device is received by the roadside antenna device 21, the radio wave received via each antenna element 28a of the array antenna 28 passes through the bandpass filter 34 and the changeover switch 33 is provided. After being amplified by the receiving amplifier 35, it is input to the mixer 36. The received radio waves in the high frequency band input to the mixer 36 are
In the mixer 36, the low frequency band is mixed with the low frequency band whose amplitude / phase is controlled by the low frequency band amplitude / phase controller 31 to be converted into an intermediate frequency band, which is then combined by the combiner 37 and input to the demodulator 38. The demodulator 38 demodulates the received radio wave in the intermediate frequency band based on the intermediate frequency output from the intermediate frequency band oscillator 25, thereby obtaining the received data from the vehicle-mounted device and transmitting it to the communication control circuit 24.

As described above, according to the roadside antenna device (variable beam antenna device) 21 of the first embodiment, since the beam is variable, it is possible to easily form an arbitrary beam (communication area). . Therefore, it is possible to flexibly cope with any installation environment (communication area). Further, it is possible to reduce the cost of developing and manufacturing the antenna and shorten the construction period, and it is also possible to improve the communication reliability by forming the communication area according to the road width.

<Second Embodiment> FIG. 3 is a block diagram of a roadside antenna apparatus (variable beam antenna apparatus) according to a second embodiment of the present invention. FIG. 4 is a configuration diagram of an amplitude / phase variable antenna feeding circuit provided in the roadside antenna device,
5 is a configuration diagram of an amplitude variable circuit provided in the amplitude / phase variable antenna feeding circuit, FIG. 6 is a control characteristic diagram of the amplitude variable circuit, and FIG. 7 is a phase variable circuit provided in the amplitude / phase variable antenna feeding circuit. FIG. 8 is a control characteristic diagram of the phase variable circuit, FIG. 9 is a configuration diagram of an amplitude / phase control circuit provided in the roadside antenna device, and FIG. 10 shows a change in a communication area due to a change in amplitude or phase. FIG.

In FIG. 3, a roadside antenna device 41, which is a variable beam antenna device, is installed on a gantry, which is a gate-shaped support strut installed across the road, and a control board rack 42 accommodating an antenna control board 43 is installed on the roadside. It is provided inside the installed housing. A communication control circuit 44 is provided in the roadside antenna device 41, and the communication control circuit 44 performs data communication with the antenna control board 43 and performs transmission / reception control.

[0035] When transmitted from the roadside antenna device 41 to the vehicle-mounted device, the modulation circuit 45 to modulate the high frequency of the carrier wave output from the high frequency band oscillator 46 of 5.8GH _Z by the transmission data, the modulated wave Transmission amplifier 4
After passing through a bandpass filter 48 having a pass band of 5.8GH _Z band is amplified by 6, the antenna switching circuit 4
8 and variable amplitude / phase antenna feeding circuit 50,
A large number of antenna elements 51a are transmitted from an array antenna 51, which is a two-dimensional array. At this time, the radio waves radiated by the respective antenna elements 51a are vector-synthesized to form a desired beam pattern (communication area). This beam pattern (communication area) is used for each antenna element 51a.
The amplitude and the phase of the microwave fed to the antenna can be arbitrarily changed by controlling the amplitude / phase variable antenna feeding circuit 50 and the amplitude / phase control circuit 55.

On the other hand, when the radio wave transmitted from the vehicle-mounted device is received by the roadside antenna device 3, the radio wave is received by each antenna element 51a of the array antenna 51, and the variable amplitude / phase antenna feeding circuit 50 and the antenna switching are performed. through the circuit 49, passed through a bandpass filter 52 having a pass band of 5.8GH _Z band, amplified by reception amplifier 53,
The demodulation circuit 54 demodulates based on the high frequency from the high frequency band oscillator 46 to obtain the reception data from the vehicle-mounted device.

As shown in FIG. 4, the amplitude / phase variable antenna feeding circuit 50 includes a distributor / combiner 61, and an amplitude variable circuit 62 and a phase variable circuit 63 provided for each antenna element 51a. At the time of transmission, the microwave (modulation wave) input to the distributor / combiner 61 via the antenna switching circuit 49 is distributed to each amplitude variable circuit 62 by the distributor / combiner 61. The amplitude variable circuit 62 adjusts the amplitude of the microwave based on the control voltage (analog) V2 from the amplitude / phase control circuit 55, and outputs this microwave to the phase variable circuit 63. The amplitude / phase control circuit 55
Outputs the control voltage V2 individually for each amplitude variable circuit 62. For example, there are N (1, 2,
, N), control voltages V2-1, V2-2, ..., V2-N are output to the amplitude variable circuits 62, respectively. In the phase variable circuit 63, the ON / OFF control voltage (digital) from the amplitude / phase control circuit 55
The phase of the microwave is adjusted based on the above, and this microwave is supplied to each antenna element 51a. It should be noted that the amplitude / phase control circuit 55 outputs O individually for each phase variable circuit 63.
Outputs N / OFF control voltage. For example, if there are N phase variable circuits 63 (1, 2, ..., N), the ON / OFF control voltage V-1,
V-2, ..., V2-N are output respectively. At the time of reception, the electric wave received via each antenna element 51a is
The signal is transmitted to the distributor / combiner 61 via the phase variable circuit 63 and the amplitude variable circuit 62, and combined by the distributor / combiner 61.

As shown in FIG. 5, the amplitude variable circuit 62 includes
Diodes D1, D2, capacitors C1, C2, C3
C4, resistors R1, R2, R3, R4, R5 and coil L
1 and L2, a fixed voltage V1 is applied to the terminal 64 from a power source (not shown), and an amplitude / voltage is applied to the terminal 65.
A variable control voltage V2 is applied from the phase control circuit 55. Then, in accordance with this control voltage V2, the diode D
The currents I1 and I2 flowing through 1 and D2 increase and decrease, the attenuation value increases and decreases, and the amplitude value of the microwave (power) output to the input / output terminals 67 and 68 increases and decreases. Specifically, as shown in [Table 1] and FIG. 6, when the control voltage V2 is increased, the amplitude value of the microwave (power) decreases, and when the control voltage V2 is decreased, the amplitude value of the microwave (power) increases. .

[0039]

[Table 1]

As shown in FIG. 7, the phase variable circuit 63 is
A plurality of (three in the figure) different phase value varying (transmission distance varying) transmission lines 72, 73, 74 are connected to connection changeover switches 75a, 75b, 76a, 76b, 77a, 7 respectively.
It is connected in parallel to the main transmission line 71 via 7b. The transmission lines 72, 73, 74 are φ1, φ, respectively.
It is set to a length at which a phase change of 2, φ3 (φ1 <φ2 <, φ3) occurs. O from the amplitude / phase control circuit 55
Depending on the N / OFF control voltage, the connection changeover switch 75a,
When 75b, 76a, 76b, 77a, 77b are turned on, the connection is switched to the transmission path 72, 73, 74 side, and O
Depending on the N / OFF control voltage, the connection changeover switch 75a,
When 75b, 76a, 76b, 77a and 77b are turned off, the transmission lines 72, 73 and 74 are separated.

In this case, the connection changeover switches 75a, 75
b, 76a, 76b, 77a, 77b
As shown in [Table 2], there are eight (8-bit) transmission paths 7.
There are 2, 73 and 74 combinations, and the phase value changes as shown in FIG. The table of [Table 2] is stored in the amplitude / phase control circuit 55. Note that the number and length of the transmission paths to be connected can be set as appropriate.

[0042]

[Table 2]

As shown in FIG. 9, the amplitude / phase control circuit 5
5 includes a CPU arithmetic circuit 81, a digital / analog conversion circuit 82, and an ON / OFF signal setting circuit 83. The CPU arithmetic circuit 81 operates based on a control signal from the communication control circuit 44, and outputs a predetermined control voltage V2 (digital) to each amplitude variable circuit 62. In the digital / analog conversion circuit 82, the CPU arithmetic circuit 8
The control voltage V2 input from 1 is converted into analog and output to each amplitude variable circuit 62. In addition, in FIG.
Although only two digital / analog conversion circuits 82 are shown in the figure, actually, the number of digital / analog conversion circuits 82 corresponding to the number of the amplitude variable circuits 62 is provided.
For example, when this number is N (1, 2, ..., N), C is set for each digital / analog conversion circuit 82.
From the PU arithmetic circuit 81, the ON / OFF control voltage V2-
1, V2-2, ..., V2-N are output,
Each digital / analog converter circuit 82 converts these into analog signals and outputs them to the respective amplitude variable circuits 62. Further, in the CPU arithmetic circuit 81, a predetermined ON / O signal is sent to each phase variable circuit 63 with respect to the ON / OFF signal setting circuit 83 in which the table shown in [Table 2] is stored.
A command is given to output the FF control voltage. ON / O
The FF signal setting circuit 83 outputs an ON / OFF control voltage to each phase variable circuit 63 based on a command from the CPU arithmetic circuit 81. In addition, in FIG. 9, only one is simply O.
Although the N / OFF signal setting circuit 83 is shown in the figure, actually, the ON / OFF switching is performed by the number corresponding to the number of the phase variable circuits 63.
A signal setting circuit 63 is provided, and this number is N
For individual (1, 2, ..., N), each ON / O
A command is given from the CPU arithmetic circuit 81 to the FF signal setting circuit 83, and based on this command, each ON / OFF signal setting circuit 63 causes each phase variable circuit 62 to turn ON / OF.
The F control voltages V-1, V-1, ..., VN are output, respectively.

Further, the roadside antenna device 41 stores an amplitude correction table 56 corresponding to each amplitude variable circuit 62 in order to correct the variation in the amplitude control characteristic of each amplitude variable circuit 62, and the CPU arithmetic circuit 81. By correcting the control voltage V2 output to each amplitude variable circuit 62 based on the amplitude correction table 56, the variation in the amplitude control characteristic of each amplitude variable circuit 62 is corrected.

As described above, according to the roadside antenna device (variable beam antenna device) 41 of the second embodiment, since the beam is variable, it is possible to easily form an arbitrary beam (communication area). . Therefore, it is possible to flexibly cope with any installation environment (communication area). Further, it is possible to reduce the cost of developing and manufacturing the antenna and shorten the construction period, and it is also possible to improve the communication reliability by forming the communication area according to the road width. Further, the amplitude varying circuit 62 can easily control the amplitude with a simple configuration, and the phase varying circuit 62 can easily control the phase with a simple configuration. Further, since the amplitude correction table 56 is provided, the accuracy of amplitude control is improved, so that the accuracy of beam pattern (communication region) formation is improved.

In the above description, the amplitude variable circuit 62 and the phase variable circuit 63 are provided to control both the amplitude and the phase, but the present invention is not necessarily limited to this, and the amplitude variable circuit 62 or the phase variable circuit 63 is not limited to this. It is also possible to provide only one of the above and control only one of the amplitude and the phase. When only the amplitude is changed, the size of the communication area 85 can be changed as shown in FIG. 10A, and when only the phase is changed, the position of the communication area 85 can be changed as shown in FIG. 10B. Can be changed. When the amplitude and the phase are changed, the size and position of the communication area 85 can be changed, so that it is possible to cope with a wider variety of installation environments.

Further, in the roadside antenna device 21 of the first embodiment, 10 dB to 15 dB when frequency conversion is performed by the mixer.
An amplifier is required for each antenna element to generate dB attenuation, and a bandpass filter is required for each antenna element to remove unnecessary frequencies.
Since a low frequency band oscillator and an intermediate frequency band oscillator are required, and because the power direction of the amplifier is one direction, a transmission amplifier and a reception amplifier are required for each antenna element, so the device configuration is comparatively small. Although the roadside antenna device 41 according to the second embodiment does not require an amplifier or a bandpass filter for each antenna element, the oscillator is only a high frequency band oscillator because the roadside antenna device 41 according to the second embodiment is complicated and costly. The device configuration can be simplified and the cost can be reduced.

<Third Embodiment> FIG. 11 is a control characteristic diagram of an amplitude variable circuit of a roadside antenna device. FIG. 12 is a configuration diagram of a roadside antenna device (variable beam antenna device) according to the third embodiment of the present invention.

As shown in FIG. 11, when the control voltage V2 is changed to change the amplitude value as shown by the solid line in FIG. 11, for example, the phase value as shown by the dotted line in FIG. Will also change. Therefore, the accuracy of phase control is reduced.

Therefore, as shown in FIG. 12, in the roadside antenna device 41 of the third embodiment, the phase correction table 9 is used.
1 is stored. Then, the amplitude / phase control circuit 55
In the CPU arithmetic circuit 81 (see FIG. 9), the ON / OFF signal setting circuit 8 is generated based on the phase correction table 91.
3 (see FIG. 9) to variable amplitude / phase antenna feeding circuit 5
ON / output to each phase variable circuit 63 (see FIG. 4) of 0 /
By adjusting the OFF control voltage, the amount of phase that changes adversely when the amplitude is changed in each amplitude variable circuit 62 is also corrected. For example, when the desired phase value is φ1, and the phase amount φ2 is corrected (cancelled) when the phase is shifted by φ2 in the amplitude control by the amplitude variable circuit 62, the phase amount in the phase variable circuit 63 is φ1. The ON / OFF control voltage is adjusted to be −φ2, and the combination of the transmission lines 72, 73, and 74 in the phase variable circuit 63 is set. The other configurations are similar to those of the roadside antenna device according to the second embodiment, and the description thereof is omitted here.

Therefore, according to the roadside antenna device (variable beam antenna device) 41 of the third embodiment, the accuracy of phase control is improved, and thus the accuracy of beam pattern (communication area) formation is improved. In the above, the phase variable circuit 63
Although phase correction is also performed in the above, the present invention is not limited to this, and although not shown, the phase variable circuit 6
3, a phase correction circuit having the same configuration as the phase variable circuit 63 is provided, for example, between the amplitude variable circuit 62 and the phase variable circuit 63, and this phase correction circuit is based on the phase correction table 91. The phase may be corrected by controlling 55. However, since the phase variable circuit and the phase correction circuit have the same configuration, it is desirable to have both of them in terms of cost.

<Fourth Embodiment> FIG. 13 is a diagram showing the arrangement of equipment for a variable amplitude / phase antenna feeding circuit when a transmission path length / phase correction table is not provided, and FIG. 14 is a roadside antenna device (variable) according to the fourth embodiment. FIG. 15 is a device layout diagram of an amplitude / phase variable antenna feeding circuit when the transmission path length / phase correction table is provided.

In FIG. 13, when the length of the transmission line 101 from the distributor / combiner 61 to the amplitude variable circuit 62 is different,
A phase difference occurs in each transmission line 101. Therefore, in order to make this phase difference uniform, it is necessary to arrange the devices as shown in FIG. 13 and make the lengths of the respective transmission lines 101 uniform. However, in this case, the arrangement of the devices is limited, which leads to an increase in the size of the device.

Therefore, in the roadside antenna device according to the fourth embodiment, as shown in FIG. 14, the transmission path length phase correction table 102 is provided in order to correct the phase difference due to the difference in the transmission path length.
Is equipped with. Then, the CP of the amplitude / phase control circuit 55
In the U arithmetic circuit 81, this transmission path length phase correction table 1
02 based on the ON / OFF signal setting circuit 83, each phase variable circuit 6 of the amplitude / phase variable antenna feeding circuit 50.
By adjusting the ON / OFF control voltage output to 3 (see FIG. 4), the phase difference due to the difference in transmission path length is also corrected. The other configurations are similar to those of the roadside antenna device according to the second embodiment, and the description thereof is omitted here.

Therefore, according to the roadside antenna device of the fourth embodiment, even if there is a difference in the length of the transmission line 101 as shown in FIG. 15, the phase difference due to the difference in the transmission line length is changed. Since the correction can be performed by the circuit 63, the degree of freedom in arranging the devices is increased, and the size of the device can be reduced. Although the phase variable circuit 63 also corrects the phase difference due to the difference in the transmission path length in the above description, the present invention is not limited to this, and the illustration is omitted.
In addition to the phase variable circuit 63, a phase correction circuit having the same configuration as the phase variable circuit 63 is provided, for example, between the amplitude variable circuit 62 and the phase variable circuit 63, and this phase correction circuit is used for the transmission path length phase correction table 102. Alternatively, the amplitude / phase control circuit 55 may control the phase difference to correct the phase difference. However, since the phase variable circuit and the phase correction circuit have the same configuration, it is desirable to have both of them in terms of cost.

<Fifth Embodiment> FIG. 16 is a block diagram of an amplitude variable circuit of a roadside antenna apparatus (variable beam antenna apparatus) according to a fifth embodiment of the present invention, and FIG. 17 is an amplitude / phase control of the roadside antenna apparatus. It is a block diagram of a circuit.

In the fifth embodiment, as the amplitude variable circuit 62 of the amplitude / phase variable antenna feeding circuit 50 (see FIG. 4), instead of the amplitude variable circuit 62 shown in FIG. 5, the amplitude variable circuit 62 shown in FIG. Equipped with. As shown in FIG.
The amplitude variable circuit 62 according to the fifth embodiment includes a plurality of (three in the illustrated example) attenuators 112, 113, 11 having different attenuation amounts.
4 to the connection changeover switches 118a, 118b, 119
a, 119b, 120a, 120b, the transmission line 1
It is configured to be connected in parallel with 11. Attenuator 11
As 2, 113 and 114, a π type or T type fixed attenuator as shown in FIG. 16 can be used. That is, by connecting a plurality of the fixed attenuators as shown in FIG. 16, the amplitude / phase control circuit 62 serving as a variable attenuator is configured.

Connection changeover switches 118a, 118b, 1
When 19a, 119b, 120a, 120b are turned on, the connection is switched to the attenuators 112, 113, 114 side, and the connection changeover switches 118a, 118b, 119a,
When 119b, 120a and 120b are turned off, the attenuators 112, 113 and 114 are disconnected. Attenuator 11
2, the attenuation amount is doubled in the attenuator 113,
In the attenuator 114, the connection changeover switches 118a, 118b, 119a, 119b, 120 are set to 4 times.
It is possible to control the amplitude in eight steps according to the states of a and 120b.

When such an amplitude variable circuit 62 is provided, the amplitude / phase control circuit 55 is constructed as shown in FIG. 17, and the connection changeover switches 118a, 118b, 119 are formed.
The ON / OFF control of a, 119b, 120a, 120b can be performed. That is, the amplitude / phase control circuit 55 shown in FIG. 17 includes an ON / OFF signal setting circuit 121 instead of the digital / analog conversion circuit 82 of the amplitude / phase control circuit 55 shown in FIG. O
The N / OFF signal setting circuit 121 stores a table of switch states as shown in [Table 2]. And
In the CPU arithmetic circuit 81, the ON / OFF signal setting circuit 1
21 to each of the amplitude variable circuits 62 to a predetermined ON / OF
A command is given to output the F control voltage. ON / OF
The F signal setting circuit 121 outputs an ON / OFF control voltage (digital) to each phase variable circuit 62 based on a command from the CPU arithmetic circuit 81.

The line of each attenuator 112, 113, 114 has a phase compensator 115, 11 in series with them.
6, 117 are respectively connected. The phase compensators 115, 116, 117 of this are attenuators 112, 113,
It is provided to match the phase of the 114 side and the phase of the transmission line 111 (or resistance) with an attenuation of 0 dB. Note that the phase compensators 115, 116, 117 are the transmission lines 111.
It may be provided on the side. The other configurations are similar to those of the roadside antenna device according to the second embodiment, and the description thereof is omitted here.

Therefore, according to the roadside antenna device (variable beam antenna device) of the fifth embodiment, an expensive diode or the like is not used in the amplitude variable circuit 62, and therefore, compared with the amplitude variable circuit 62 of the second embodiment. As a result, the cost of the device can be reduced.

<Sixth Embodiment> FIG. 18 is a block diagram of an amplitude / phase variable antenna feeding circuit when an amplitude variable circuit and a phase variable circuit are provided for each antenna element, and FIG. 19 is a sixth embodiment of the present invention. 5 is a configuration diagram of an amplitude / phase variable antenna feeding circuit of the roadside antenna apparatus (variable beam antenna apparatus) according to FIG.

In the second to fifth embodiments described above, the amplitude variable circuit 62 and the phase variable circuit 63 are provided for each antenna element 51a as shown in FIG. 18. However, depending on the beam pattern, the plurality of antenna elements 51a may have the same amplitude and phase. It may be phase. Therefore, in the sixth embodiment, the variable amplitude / phase antenna feeding circuit 50 is configured as shown in FIG.

That is, the antenna element 51a is divided into a plurality of blocks 132, a distributor / combiner 131 is provided on the output side of the phase variable circuit 63, and a distributor / combiner is provided for a plurality of antenna elements 51a belonging to the same block 132. 1
31 supplies electric power (microwave) having the same amplitude and phase. The other configurations are similar to those of the roadside antenna device according to the second embodiment, and the description thereof is omitted here.

Therefore, according to the amplitude / phase variable antenna feeding circuit 50 of the roadside antenna apparatus of the sixth embodiment, the amplitude variable circuit 62 and the phase variable circuit 63 can be reduced, so that the apparatus can be downsized and reduced. Cost can be reduced.

<Embodiment 7> FIG. 20 is a block diagram of a roadside antenna apparatus (variable beam antenna apparatus) according to Embodiment 7 of the present invention.

As shown in FIG. 20, in the roadside antenna device 41 of the seventh embodiment, a radio wave reflection plate (metal plate) 143 is detachably attached to the front surface of the antenna element 51a, and a phase comparator is provided. 141 and an analog / digital converter 142.

When detecting the phase of the radio wave radiated from the antenna element 51a, the radio wave reflector 143 is mounted in front of the antenna element 51a, and the radio wave reflector 143 is attached.
Then, the radio wave radiated from the antenna element 51a is reflected and received by the same antenna element 51a. In the phase comparator 141, at this time, the received radio wave obtained from the antenna element 51 a via the variable amplitude / phase antenna feeding circuit 50, the bandpass filter 52 and the receiving amplifier 53, and the high frequency output from the high frequency band oscillator 46. To detect the phase of the received radio wave and output it to the analog / digital converter 142.

In the analog / digital converter 142,
The phase value detected by the phase comparator 141 is converted into a digital signal, and the CPU arithmetic circuit 81 of the amplitude / phase control circuit 55 is converted.
(See FIG. 9). Such phase detection processing is performed on each antenna element 51a. CPU arithmetic circuit 81
Then, the phase correction table is created by obtaining the phase correction amount based on the required phase value and the detected phase value that are input in advance. The other configurations are similar to those of the roadside antenna device according to the second embodiment, and the description thereof is omitted here.

Therefore, according to the roadside antenna device (variable beam antenna device) 41 of the seventh embodiment, the phase of the actual radio wave transmitted from the antenna element 51a is detected and the phase correction table is created. A good phase correction table can be obtained.

[0071]

As described above in detail with the embodiments of the invention, the low frequency band oscillator, the intermediate frequency band oscillator and the low frequency band amplitude controller of the first invention are provided, and the low frequency band The amplitude is controlled by the low frequency band amplitude controller in the low frequency band output from the oscillator, and the frequency is converted to the high frequency band by multiplying this low frequency band and the intermediate frequency band output from the intermediate frequency band oscillator. And is configured to feed power to the antenna element of the array antenna.

The variable beam antenna apparatus of the second invention has a low frequency band oscillator, an intermediate frequency band oscillator and a low frequency band phase controller, and the low frequency band output from the low frequency band oscillator is used for the low frequency band oscillator. The phase is controlled by the frequency band phase controller, and the low frequency band and the intermediate frequency band output from the intermediate frequency band oscillator are multiplied to convert the frequency to the high frequency band and feed the antenna element of the array antenna. It is characterized in that it is configured as follows.

The variable beam antenna apparatus according to the third invention comprises a low frequency band oscillator, an intermediate frequency band oscillator, and a low frequency band amplitude / phase controller, and outputs in the low frequency band output from the low frequency band oscillator. The amplitude and phase are controlled by the low frequency band amplitude / phase controller, and the low frequency band and the intermediate frequency band output from the intermediate frequency band oscillator are multiplied to convert the frequency to the high frequency band, and the array antenna It is characterized in that it is configured to feed power to the antenna element.

Therefore, according to the variable beam antenna apparatus of the first, second or third invention, the beam is variable, so that an arbitrary beam (communication area) can be easily formed. Therefore, it is possible to flexibly cope with any installation environment (communication area). Particularly, in the third invention, since the amplitude and the phase are controlled, it is possible to cope with a wider variety of installation environments. Further, it is possible to reduce the cost of developing and manufacturing the antenna and shorten the construction period, and it is also possible to improve the communication reliability by forming the communication area according to the road width.

The variable beam antenna apparatus of the fourth invention comprises a distributor / combiner and a plurality of amplitude variable circuits for changing the amplitude of the electric power distributed by the distributor / combiner and feeding the antenna elements of the array antenna. It is characterized in that it has an amplitude variable antenna feeding circuit having the same and an amplitude control circuit for controlling the amplitude variable circuit.

The variable beam antenna apparatus of the fifth invention comprises a distributor / combiner and a plurality of phase variable circuits for changing the phase of the power distributed by the distributor / combiner to feed the antenna elements of the array antenna. And a phase control circuit for controlling the phase variable circuit.

The variable beam antenna apparatus according to the sixth aspect of the invention comprises a distributor / combiner and a plurality of variable amplitude units for supplying power to the antenna elements of the array antenna by changing the amplitude and phase of the power distributed by the distributor / combiner. An amplitude / phase variable antenna power feeding circuit including a circuit and a phase variable circuit,
An amplitude / phase control circuit for controlling the amplitude variable circuit and the phase variable circuit is provided.

Therefore, according to the variable beam antenna apparatus of the fourth, fifth or sixth invention, the beam is variable, so that an arbitrary beam (communication area) can be easily formed. Therefore, it is possible to flexibly cope with any installation environment (communication area). Particularly, in the sixth invention, since the amplitude and the phase are controlled, it is possible to cope with a wider variety of installation environments. Further, it is possible to reduce the cost of developing and manufacturing the antenna and shorten the construction period, and it is also possible to improve the communication reliability by forming the communication area according to the road width. Moreover, as compared with the variable beam antenna apparatus of the first, second and third inventions, the apparatus configuration is simplified and the cost can be reduced.

A variable beam antenna apparatus according to a seventh aspect of the invention is the variable beam antenna apparatus according to the fourth or sixth aspect of the invention, which has an amplitude correction table for correcting variations in the amplitude control characteristics of the amplitude variable circuit, In the amplitude control circuit or the amplitude / phase control circuit, by controlling the amplitude variable circuit based on the amplitude correction table,
Variations in the amplitude control characteristics of the amplitude variable circuit are corrected.

Therefore, according to the variable beam antenna apparatus of the seventh invention, since the amplitude correction table is provided, the accuracy of the amplitude control is improved, so that the accuracy of the beam pattern (communication area) formation is improved.

The variable beam antenna apparatus according to the eighth invention is the variable beam antenna apparatus according to the fourth, sixth or seventh invention, wherein a phase amount that adversely changes when the amplitude is changed by the amplitude changing circuit is set. A phase correction table for correction is provided, and the amplitude control circuit or the amplitude / phase control circuit corrects the phase amount by controlling the phase variable circuit or the phase correction circuit based on the phase correction table. It is characterized by doing.

Therefore, according to the variable beam antenna device of the eighth invention, the accuracy of phase control is improved, and the accuracy of beam pattern (communication area) formation is improved.

The variable beam antenna apparatus according to the ninth aspect of the invention is the variable beam antenna apparatus according to the fourth, fifth, sixth, seventh or eighth aspect for correcting the phase difference due to the difference in transmission path length. A transmission path length phase correction table is provided, and the amplitude control circuit, the phase control circuit, or the amplitude / phase control circuit controls the phase variable circuit or the phase correction circuit based on the transmission path length phase correction table. Is used to correct the phase difference.

Therefore, according to the variable beam antenna device of the ninth invention, the phase difference due to the difference in the transmission path length can be corrected by the phase variable circuit or the phase correction circuit.
The degree of freedom in arranging the devices is increased, and the size of the device can be reduced.

The variable beam antenna apparatus according to the tenth invention is the variable beam antenna apparatus according to the fourth, sixth, seventh or eighth invention, wherein the amplitude variable circuit has a diode. The amplitude of the electric power passing through the diode is controlled by controlling the current flowing through the diode by the control voltage from the amplitude control circuit or the amplitude / phase control circuit.

Therefore, according to the variable beam antenna device of the tenth invention, the amplitude variable circuit can easily control the amplitude with a simple structure.

The variable beam antenna apparatus according to the eleventh invention is the variable beam antenna apparatus according to the fifth, sixth, seventh or eighth invention, wherein the phase varying circuit is for varying a plurality of phase values having different lengths. The transmission line is connected to the main transmission line in parallel via a connection changeover switch.

Therefore, according to the variable beam antenna apparatus of the eleventh aspect of the invention, the phase variable circuit can easily control the phase with a simple structure.

The variable beam antenna apparatus according to the twelfth invention is the variable beam antenna apparatus according to the fourth, sixth, seventh or eighth invention, wherein the amplitude variable circuit comprises a plurality of attenuators having different attenuation amounts, It is characterized in that it is connected in parallel with the transmission line via a connection changeover switch.

Therefore, according to the variable beam antenna device of the twelfth aspect of the present invention, since the expensive diode or the like is not used in the amplitude variable circuit, the cost of the device can be reduced.

The variable beam antenna apparatus according to the thirteenth invention is the fourth, fifth, sixth, seventh, eighth, ninth, tenth,
In the variable beam antenna device according to the eleventh or twelfth aspect of the invention, the antenna element of the array antenna is divided into a plurality of blocks, and the amplitude variable circuit or the phase variable circuit is divided by a distributor / combiner for the antenna elements belonging to the same block. It is characterized in that it is configured to supply power of the same amplitude or phase or the same amplitude and phase controlled by the amplitude variable circuit and the phase variable circuit.

Therefore, according to the variable beam antenna apparatus of the thirteenth invention, the amplitude variable circuit and the phase variable circuit can be reduced, so that the apparatus can be downsized and the cost can be reduced.

The variable beam antenna device of the fourteenth invention is the variable beam antenna device of the fifth or sixth invention, in which a radio wave reflector is mounted in front of the antenna element, and the radio wave reflector radiates from the antenna element. The reflected radio wave is received by the same antenna element, the received radio wave is compared with the high frequency output from the high frequency band oscillator, the phase of the received radio wave is detected, and the phase is corrected based on this detected phase value. It is characterized by creating a table.

Therefore, according to the variable beam antenna device of the fourteenth invention, the phase of the actual radio wave transmitted from the antenna element is detected and the phase correction table is created.
An accurate phase correction table can be obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a roadside antenna device (variable beam antenna device) according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a frequency conversion method in the variable beam antenna device.

FIG. 3 is a configuration diagram of a roadside antenna device (variable beam antenna device) according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of an amplitude / phase variable antenna feeding circuit provided in the roadside antenna device.

FIG. 5 is a configuration diagram of an amplitude variable circuit provided in the amplitude / phase variable antenna feeding circuit.

FIG. 6 is a control characteristic diagram of the amplitude variable circuit.

FIG. 7 is a configuration diagram of a phase variable circuit provided in the amplitude / phase variable antenna feeding circuit.

FIG. 8 is a control characteristic diagram of the phase variable circuit.

FIG. 9 is a configuration diagram of an amplitude / phase control circuit provided in the roadside antenna device.

FIG. 10 is an explanatory diagram showing changes in the communication area due to changes in amplitude and phase.

FIG. 11 is a control characteristic diagram of the amplitude variable circuit of the roadside antenna device.

FIG. 12 is a configuration diagram of a roadside antenna device (variable beam antenna device) according to a third embodiment of the present invention.

FIG. 13 is a device layout diagram of an amplitude / phase variable antenna feeding circuit when a transmission path length / phase correction table is not provided.

FIG. 14 is a main part configuration diagram of a roadside antenna device (variable beam antenna device) according to a fourth embodiment.

FIG. 15 is a device layout diagram of an amplitude / phase variable antenna feeding circuit when the transmission path length / phase correction table is provided.

FIG. 16 is a configuration diagram of an amplitude variable circuit of a roadside antenna device (variable beam antenna device) according to a fifth embodiment of the present invention.

FIG. 17 is a configuration diagram of an amplitude / phase control circuit of the roadside antenna device.

FIG. 18 is a configuration diagram of an amplitude / phase variable antenna feeding circuit when an amplitude variable circuit and a phase variable circuit are provided for each antenna element.

FIG. 19 is a configuration diagram of an amplitude / phase variable antenna feeding circuit of a roadside antenna device (variable beam antenna device) according to a sixth embodiment of the present invention.

FIG. 20 is a configuration diagram of a roadside antenna device (variable beam antenna device) according to a seventh embodiment of the present invention.

FIG. 21 is a configuration diagram of a roadside antenna device in a conventional ETC system.

FIG. 22 is a configuration diagram of an antenna feeding circuit in the roadside antenna device.

FIG. 23 is an explanatory diagram showing a difference in communication area due to a difference in the number of lanes.

[Explanation of symbols]

21 Roadside Antenna Device (Variable Beam Antenna Device) 22 Antenna Control Board 23 Control Board Rack 24 Communication Control Circuit 25 Intermediate Frequency Band Oscillator 26 Modulator 27 Distributor 28 Array Antenna 29 Mixer 30 Low Frequency Band Oscillator 31 Low Frequency Band Amplitude / Phase Controller 32 Transmission amplifier 33 Changeover switch 34 Bandpass filter 35 Reception amplifier 36 Mixer 37 Combiner 38 Demodulator 41 Roadside antenna device 42 Control board rack 43 Antenna control board 44 Communication control circuit 45 Modulation circuit 47 Transmission amplifier 48 Bandpass filter 49 Antenna switching circuit 50 Amplitude / phase variable antenna feeding circuit 51 Array antenna 51a Antenna element 52 Band pass filter 53 Reception amplifier 54 Demodulation circuit 55 Amplitude / phase control circuit 56 Amplitude correction table 61 Distributor / combiner 62 Amplitude variable circuit 63 Phase variable circuit 64, 65 Terminal 67, 68 Input / output terminal 71 Main transmission path 72, 73, 74 Transmission path 75a, 75b, 76a, 76b, 77a, 77b Connection changeover switch 81 CPU arithmetic circuit 82 Digital / analog Conversion circuit 83 ON / OFF signal setting circuit 85 Communication area 91 Phase correction table 101 Transmission path 102 Transmission path length phase correction table 111 Transmission paths 112, 113, 114 Attenuators 115, 116, 117 Phase compensators 118a, 118b, 119a, 119b Connection changeover switches 120a and 120b Connection changeover switch 121 ON / OFF signal setting circuit 132 Block 141 Phase comparator 142 Analog / digital converter 143 Radio wave reflection plate

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masayuki Yasui             1-1 1-1 Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo             No. Mitsubishi Heavy Industries, Ltd.Kobe Shipyard F term (reference) 5J021 AA03 AA11 CA06 DB01 DB05                       EA06 FA06 FA12 FA17 FA31                       FA32 GA02 HA06 HA10 JA07                 5K067 AA21 AA42 BB21 EE02 EE10                       FF02 HH23 KK02 KK03 KK15

Claims (14)

[Claims] 1. A low frequency band oscillator, an intermediate frequency band oscillator, and a low frequency band amplitude controller, the amplitude being controlled by the low frequency band amplitude controller in the low frequency band output from the low frequency band oscillator. A variable frequency conversion circuit that multiplies the low frequency band and the intermediate frequency band output from the intermediate frequency band oscillator to convert the frequency to a high frequency band and feeds the antenna element of the array antenna. Beam antenna device. 2. A low frequency band oscillator, an intermediate frequency band oscillator, and a low frequency band phase controller, wherein a phase is controlled by the low frequency band phase controller in a low frequency band output from the low frequency band oscillator. A variable frequency conversion circuit that multiplies the low frequency band and the intermediate frequency band output from the intermediate frequency band oscillator to convert the frequency to a high frequency band and feeds the antenna element of the array antenna. Beam antenna device. 3. A low frequency band oscillator, an intermediate frequency band oscillator, and a low frequency band amplitude / phase controller, wherein a low frequency band output from said low frequency band oscillator is controlled by said low frequency band amplitude / phase controller. Amplitude and phase control, frequency conversion to a high frequency band by multiplying this low frequency band and the intermediate frequency band output from the intermediate frequency band oscillator,
A variable beam antenna device, which is configured to feed power to an antenna element of an array antenna. 4. An amplitude variable antenna feeding circuit comprising a distributor / combiner and a plurality of amplitude variable circuits for supplying the antenna elements of the array antenna by changing the amplitude of the power distributed by the distributor / combiner. And a variable amplitude control circuit for controlling the variable amplitude circuit. 5. A phase variable antenna feed circuit comprising a distributor / combiner and a plurality of phase variable circuits for changing the phase of the power distributed by the distributor / combiner to supply power to the antenna element of the array antenna. And a phase control circuit for controlling the phase variable circuit. 6. A distributor / combiner, and a plurality of amplitude variable circuits and phase variable circuits for changing the amplitude and phase of the power distributed by the distributor / combiner to feed the antenna elements of the array antenna. A variable beam antenna apparatus comprising: an amplitude / phase variable antenna feeding circuit, and an amplitude / phase control circuit for controlling the amplitude variable circuit and the phase variable circuit. 7. The variable beam antenna apparatus according to claim 4 or 6, further comprising an amplitude correction table for correcting variations in amplitude control characteristics of the amplitude variable circuit, the amplitude control circuit or the amplitude / phase. A variable beam antenna apparatus, wherein a control circuit controls the amplitude variable circuit based on the amplitude correction table, thereby correcting variations in amplitude control characteristics of the amplitude variable circuit. 8. The variable beam antenna apparatus according to claim 4, further comprising a phase correction table for correcting a phase amount that adversely changes when the amplitude is changed by the amplitude changing circuit. The variable beam antenna device, wherein the amplitude control circuit or the amplitude / phase control circuit corrects the phase amount by controlling the phase variable circuit or the phase correction circuit based on the phase correction table. . 9. The variable beam antenna device according to claim 4, 5, 6, 7 or 8, further comprising a transmission path length phase correction table for correcting a phase difference due to a difference in transmission path length, The control circuit, the phase control circuit, or the amplitude / phase control circuit corrects the phase difference by controlling the phase variable circuit or the phase correction circuit based on the transmission path length phase correction table. Variable beam antenna device. 10. The variable beam antenna device according to claim 4, 6, 7 or 8, wherein the amplitude variable circuit has a diode, and a current flowing through the diode is supplied to the amplitude control circuit or the amplitude control circuit. A variable beam antenna device characterized in that the amplitude of electric power passing through the diode is controlled by controlling by a control voltage from an amplitude / phase control circuit. 11. The variable beam antenna apparatus according to claim 5, 6, 7, 8 or 9, wherein the phase variable circuit includes a plurality of phase value variable transmission lines having different lengths and a connection changeover switch. A variable beam antenna device, characterized in that the variable beam antenna is connected in parallel to the main transmission line via the transmission line. 12. The variable beam antenna device according to claim 4, 6, 7 or 8, wherein the amplitude variable circuit includes a plurality of attenuators having different attenuation amounts,
A variable beam antenna device characterized in that it is connected in parallel with a transmission line via a connection changeover switch. 13. The method according to claim 4, 5, 6, 7, 8, 9, 1.
In the variable beam antenna device according to 0, 11 or 12, the antenna elements of the array antenna are divided into a plurality of blocks, and the antenna elements belonging to the same block are distributed / distributed.
A variable characterized by being configured to supply power of the same amplitude or phase or the same amplitude and phase controlled by the amplitude variable circuit or the phase variable circuit or the amplitude variable circuit and the phase variable circuit by a combiner. Beam antenna device. 14. The variable beam antenna device according to claim 5, wherein a radio wave reflection plate is mounted in front of the antenna element, and the radio wave radiated from the antenna element is reflected by this radio wave reflection plate to obtain the same antenna element. It is characterized in that the phase of the received radio wave is detected by comparing the received radio wave with the high frequency output from the high frequency band oscillator, and a phase correction table is created based on the detected phase value. Variable beam antenna device.