JP5694240B2 - Tracking antenna device and transmission phase compensation method - Google Patents

Description

  The present invention relates to a tracking antenna device and a transmission phase compensation method in an earth station device for mobile satellite communication.

  Since satellite communication is the only broadband communication means provided on the ocean, reliability against failure of the earth station device for satellite communication on board is required. As a technique for realizing this at a low cost, a tracking antenna apparatus using a plurality of antennas has been studied (Non-patent Document 1). Here, the tracking antenna device has a function of mechanically controlling the directivity direction (elevation angle and azimuth angle) of the antenna by detecting the directivity direction estimation and the directivity direction error amount from various sensor information and signals received from the other party of communication. I have.

FIG. 5 shows a configuration example of a conventional tracking antenna apparatus using a plurality of antennas.
In FIG. 5, the tracking antenna device includes N (N is an integer of 2 or more) transmission / reception devices 50-1 to 50 -N, a phase control device 60, and a modem device 70.

FIG. 6 shows a configuration example of a conventional transmission / reception device 50-k (k = 1 to N).
In FIG. 6, the transmission / reception device 50-k includes an antenna unit 51, a frequency up-converter (UC) 52, and a frequency down-converter (DC) 53. The UC 52 and the DC 53 include a local oscillator that outputs a local signal LO _k having a frequency f _LO and a frequency converter. The frequency converter of the UC 52 mixes the transmission IF signal T _{IF-k of} the frequency f _IF input from the modulation / demodulation device 70 via the phase control device 60 and the local signal LO _k and up-converts the frequency f _RF (= f _IF + f _LO ) transmission RF signal T _RF-k is output to antenna unit 51. The frequency converter of the DC 53 mixes the received RF signal R _{RF-k of} the frequency f _RF received by the antenna unit 51 and the local signal LO _k and receives the down-converted frequency f _IF (= f _RF −f _LO ). The IF signal R _IF-k is output to the modem device 70 via the phase control device 60.

  In such a tracking antenna device, the transmission RF signal from each transmission / reception device 50-k is controlled to be transmitted in a predetermined phase (for example, in-phase) to the satellite station, thereby improving the reliability and the pointing accuracy. , EIRP (effective radiation power) and G / T (reception performance) are improved.

  However, in order to control each transmission RF signal to be transmitted at a predetermined phase (for example, in-phase), phase fluctuations generated by the UC 52 and amplifier (not shown in FIG. 6) of each transmission / reception device 50-k, It is necessary to compensate for the path length variation between. For the former UC52 and amplifier phase fluctuation compensation, a transmission RF signal output from the UC52 is converted into a low-frequency FB (feedback) signal using a multiplied wave of the transmission IF signal or a low-frequency reference signal. Thus, there has been proposed a method of feeding back to the phase control device 60 and compensating for the phase fluctuation generated in each transmission / reception device 50-k (Non-Patent Documents 2 and 3).

  In addition, the latter variation in path length is caused by the direction of the arrival of the satellite because the direction and distance of the satellite changes from moment to moment when the tracking antenna device is placed in a moving or shaking environment such as on a ship as shown in FIG. Has been proposed to compensate for path length variations (Non-Patent Document 4).

  In order to realize these methods, it is first necessary to compensate the initial phase characteristics of each transmitting / receiving device. As an initial phase characteristic compensation method, the element electric field vector rotation method (REV method: Rotating Element Electric Field Vector Method) is used to shift the phase of each transmitting / receiving device, and the return of the own signal via the satellite is maximized. There is a method of performing compensation so as to satisfy (Non-Patent Document 5). Also, a method for compensating for non-uniform components of amplitude and phase by controlling the transmission RF signals output from the antennas of the respective transmitting and receiving apparatuses to be orthogonal using a synchronous orthogonal code and performing inverse FFT conversion on the received signal. (Non-Patent Document 6).

Susaki, Suzuki, Yamashita, Kobayashi, "Study on a tracking antenna for a shipboard earth station using multiple antennas", 2010 IEICE Society Conference, B-3-19, 2010 Susaki, Suzuki, Kobayashi, "Method for compensating phase variation of shipboard earth station distributed array antenna and experimental verification", IEICE Technical Report SAT2011-3, pp.11-16, May 2011 Susaki, Suzuki, Hirose, Sugiyama, “Examination of compensation for phase variation in receiving system of shipboard earth station distributed array antenna”, 2012 IEICE General Conference B-3-5 Susaki, Suzuki, Kobayashi, “Examination of compensation method for path length variation in shipboard environment of ESV distributed array antenna”, IEICE Technical Report SAT2011-9, pp.7-12, July 2011 Mano, Katagi, "Element Amplitude Phase Measurement Method for Phased Array Antenna-Element Electric Field Vector Rotation Method", IEICE Transactions B, Vol.J65-B, No.5, pp.555-560, 1982 May Odo, Miura, "Transmission Array Antenna Calibration Using Synchronous Orthogonal Codes", IEICE Techniques A / P99-121, RCS99-118, October 1999

The local oscillators included in the UC 52 and the DC 53 of each transmission / reception device 50-k shown in FIG. 6 oscillate at the same frequency (13.05 GHz in the Ku band) by a common reference signal (for example, 10 MHz reference signal). However, since the frequency difference between the frequency f _{LO of the} local signal output from the local oscillator and the reference signal is more than 1000 times, a slight phase shift Δθ _k (t) due to frequency division between the local oscillators is accumulated. The relative phase varies with time. FIG. 8 shows an example of time variation of the relative phase difference of the transmission signal generated between the transmitting and receiving apparatuses. FIG. 9 shows an example of time variation of the relative phase difference between two received signals generated between the transmitting and receiving apparatuses. When such a relative phase difference occurs, problems such as a decrease in gain and a shift in the directivity direction occur, and it is necessary to compensate for these phase fluctuations that occur over time.

  Since these phase shifts have different values every time each transmitting / receiving apparatus is activated, it is necessary to perform initial phase correction of the transmission signal using means such as the REV method. However, since the REV method sees the change in the reception level of the satellite return signal of the local station signal, a delay of 250 ms occurs until the correction is reflected in the reception level, and each phase is increased as the number of transmission / reception devices increases. It takes time to adjust and monitor. In addition, in order to perform calibration with high accuracy when using a synchronous orthogonal code, it is necessary to know the satellite direction in advance, which is not suitable for the system to be applied.

  Furthermore, since the transmission system and the reception system operate independently, it is necessary to generate FB signals for each of them, and there is a problem that the configuration of the transmission / reception apparatus becomes complicated.

  In addition, as shown in FIG. 7, when the phase relationship of transmission / reception signals in each transmission / reception device changes due to movement or shaking of the ship, the arrival direction is estimated, and phase fluctuation compensation accompanying path length fluctuation is required. Become.

  It is an object of the present invention to provide a tracking antenna apparatus and a transmission phase compensation method that can simultaneously compensate for phase fluctuations and path length fluctuations between a plurality of transmission / reception apparatuses.

  A first invention is a tracking antenna device in which a transmission IF signal is input from a phase control device to a plurality of transmission / reception devices, and a transmission RF signal obtained by frequency-converting the transmission IF signal by each transmission / reception device is transmitted from an antenna unit at a predetermined phase. The plurality of transmission / reception devices receive the first reception RF signal and the second reception RF signal of different frequencies simultaneously transmitted from the same device, and frequency-convert each reception RF signal using the transmission RF signal as a local signal. The first frequency conversion signal and the second frequency conversion signal are sent to the phase control device, and the phase control device receives the first frequency conversion input from the reference transmission / reception device and the control target transmission / reception device, respectively. A first arrival direction estimating means for expanding a signal into eigenvalues and estimating a first arrival direction in a transmission / reception device to be controlled; and a transmission / reception device to be controlled A first arrival direction estimating means for expanding eigenvalues of the first frequency conversion signal and the second frequency conversion signal input from the input and estimating a second arrival direction in the transmission / reception apparatus to be controlled; Transmission phase setting means for setting the phase of the transmission IF signal transmitted to the transmission / reception apparatus to be controlled in a direction in which the difference from the second arrival direction becomes smaller.

  A second invention is a tracking antenna device in which a transmission RF signal is input from a phase control device to a plurality of transmission / reception devices, and each transmission / reception device transmits a transmission RF signal from an antenna unit at a predetermined phase. The first reception RF signal and the second reception RF signal of different frequencies transmitted simultaneously from the same device are received, each reception RF signal is frequency-converted using the transmission RF signal as a local signal, and the first frequency conversion signal is converted. And a second frequency conversion signal that is sent to the phase control device, the phase control device frequency-converting the transmission IF signal to a transmission RF signal and sending it to each transmission / reception device, and a reference transmission / reception device The first frequency conversion signal input from each of the apparatus and the transmission / reception apparatus to be controlled is expanded into eigenvalues, and the first arrival direction in the transmission / reception apparatus to be controlled is determined. Eigenvalue expansion is performed on the first arrival direction estimation means to be determined and the first frequency conversion signal and the second frequency conversion signal input from the transmission / reception apparatus to be controlled, and the second arrival direction in the transmission / reception apparatus to be controlled is estimated Second arrival direction estimation means for performing transmission phase setting means for setting a phase of a transmission RF signal to be transmitted to a transmission / reception apparatus to be controlled in a direction in which a difference between the first arrival direction and the second arrival direction is reduced. With.

  According to a third aspect of the present invention, there is provided a tracking antenna device that inputs transmission IF signals from a phase control device to a plurality of transmission / reception devices, and transmits transmission RF signals obtained by frequency conversion of the transmission IF signals by the transmission / reception devices from an antenna unit at a predetermined phase. In the transmission phase control method, the plurality of transmission / reception devices receive the first reception RF signal and the second reception RF signal of different frequencies simultaneously transmitted from the same device, and each reception RF is made the transmission RF signal as a local signal. The signal is frequency-converted and sent to the phase control device as a first frequency conversion signal and a second frequency conversion signal. The phase control device receives a first input from a reference transmission / reception device and a control target transmission / reception device, respectively. First frequency expansion of the frequency conversion signal, estimation of the first arrival direction in the transmission / reception apparatus to be controlled, and input from the transmission / reception apparatus to be controlled The eigenvalue expansion is performed on the number conversion signal and the second frequency conversion signal, the second arrival direction in the transmission / reception apparatus to be controlled is estimated, and the difference between the first arrival direction and the second arrival direction is reduced. Sets the phase of the transmission IF signal to be transmitted to the transmission / reception device to be controlled.

  A fourth aspect of the invention relates to a transmission phase control method for a tracking antenna device in which a transmission RF signal is input from a phase control device to a plurality of transmission / reception devices, and each transmission / reception device transmits a transmission RF signal at a predetermined phase from an antenna unit. The plurality of transmission / reception devices receive the first reception RF signal and the second reception RF signal of different frequencies simultaneously transmitted from the same device, frequency-convert each reception RF signal using the transmission RF signal as a local signal, The frequency control signal is sent to the phase control device as a frequency conversion signal of 1 and a second frequency conversion signal, and the phase control device converts the frequency of the transmission IF signal to a transmission RF signal and sends it to each transmission / reception device. The first frequency conversion signal input from each control target transmission / reception device is eigenvalue-expanded, the first arrival direction in the control target transmission / reception device is estimated, and control is performed. The first frequency conversion signal and the second frequency conversion signal input from the elephant transmission / reception apparatus are expanded to eigenvalues, the second arrival direction in the transmission / reception apparatus to be controlled is estimated, and the first arrival direction and the second arrival direction are estimated. The phase of the transmission RF signal transmitted to the transmission / reception device to be controlled is set in the direction in which the difference from the direction becomes smaller.

  The present invention expands eigenvalues of first frequency conversion signals respectively input from a reference transmission / reception device and a control target transmission / reception device, and estimates a first arrival direction including a phase error in the control target transmission / reception device. Further, the first and second frequency conversion signals input from the transmission / reception apparatus to be controlled are expanded to eigenvalues, and the second arrival direction not including the phase error in the transmission / reception apparatus to be controlled is estimated. By setting the phase of the transmission IF signal (or transmission RF signal) transmitted to the transmission / reception apparatus to be controlled in a direction in which the difference between the first arrival direction and the second arrival direction becomes smaller, the transmission / reception apparatus to be controlled It is possible to simultaneously compensate for phase variation and path length variation with the same device.

It is a figure which shows the structure of Example 1 of the tracking antenna apparatus of this invention. It is a figure which shows the simulation result of the arrival direction estimation using 1 received signal received by two antennas. It is a figure which shows the simulation result of the arrival direction estimation using 2 received signals of a different frequency received by one antenna. It is a figure which shows the structure of Example 2 of the tracking antenna apparatus of this invention. It is a figure which shows the structural example of the conventional tracking antenna apparatus which uses a some antenna. It is a figure which shows the structural example of the conventional transmission / reception apparatus 50-k. It is a figure which shows the example of a path | route length fluctuation | variation by a movement and shaking. It is a figure which shows the time variation example of the relative phase difference of the transmission signal which arises between transmission / reception apparatuses. It is a figure which shows the example of a time fluctuation | variation of the relative phase difference of the two received signals produced between transmission / reception apparatuses.

FIG. 1 shows a configuration of a tracking antenna device according to a first embodiment of the present invention.
In FIG. 1, the tracking antenna device of the present embodiment is configured by a transmission / reception device 10-k (k = 1 to N, N is an integer of 2 or more), a phase control device 20 and a modulation / demodulation device (not shown in FIG. 1). .

The transmission / reception device 10-k includes an antenna unit 11, a frequency up-converter (UC) 12, a frequency converter 13, and amplifiers 14 and 15. The antenna unit 11 receives received RF signals S _r1 and S _r2 having different frequencies f _r1 and f _r2 from the satellite and inputs them to the frequency converter 13 via the amplifier 15. One is a communication line and the other is a control line. The transmission IF signal inputted through the phase control device 20 is frequency-converted to a transmission RF signal S _tk frequency f _t in UC12, frequency converter with transmitted from the antenna unit 11 to the satellite via the amplifier 14 13, the transmission RF signal S _tk is used as a local signal for frequency conversion of the reception RF signals S _r1-k and S _r2-k . The transmission RF signal S _tk of each transmission / reception device 10-k includes a phase error due to the phase variation of the UC 12, and the reception RF signals S _r1-k and S _r2-k include the phase variation of the UC 12 and the path to the satellite. Includes phase error due to long variation.

The phase control device 20 includes a transmission phase setting unit 21, a baseband conversion unit 22 including a wavelength separation filter that separates the frequencies f _r1 and f _r2 , an arrival direction estimation unit 23, and an error comparison unit 24. The transmission IF signal input to the phase control device 20 is transmitted to the UC 12 of each transmission / reception device 10-k via the transmission phase setting unit 21. The reception IF signal output from each transmission / reception device 10-k is input to the baseband conversion unit 23 of the phase control device 20, and processing for canceling the transmission modulation component is performed using the transmission IF signal.

(Direction of arrival estimation using one received signal received by two antennas)
A procedure for calculating the direction-of-arrival estimated value using the same received RF signals S _r1-1 (t) and S _r1-k (t) received by the transmitting and receiving apparatuses 10-1 and 10-k will be described.

The received RF signal S _r1-k (t) of the frequency f _r1 received at the time t by the transmitting / receiving device 10-k has a distance from an arbitrary reference point as d _k , a wavelength as λ _r1 , and an arrival direction angle as θa. sometimes,
S _r1−k (t) = expj [2πf _r1 t + (2πd _k / λ _r1 ) sinθa (t)] (1)
It is expressed.

The received RF signal S _r1-k (t) is input to the frequency converter 13 and frequency-converted using the transmission RF signal S _tk (t) as a local signal. The transmission RF signal S _tk (t) has an initial phase value of UC12 of φ _uc-k (t).
S _tk (t) = expj [2πf _r1 t + φ _uc-k (t)] (2)
The received IF signal S _r1c-k (t) after frequency conversion is based on the phase of S _r1c-1 (t).
S _r1c-k (t) = expj [2π (f _r1 −f _t ) t + (2πd _k / λ _r1 ) sin θa (t) −φ _uc−k (t)] (3)
It becomes.

The baseband received signal S _r1b-k (t) generated by inputting the received IF signal S _r1c-k (t) to the baseband conversion unit 22 of the phase control device 20 is the _Sr1c-1 (t) With reference to phase
S _r1b-k (t) = expj [(2πd _k / λ _r1 ) sin θa (t)] expj [−φ _uc-k (t)] (4)
It becomes.

Here, when the transmission / reception device 10-1 is used as a reference and d ₁ = 0 and φ _uc-1 (t) = 0, the base converted from the reception RF signal S _r1-1 (t) of the transmission / reception device 10-1 is used. The band received signal S _r1b-1 (t) is
S _r1b-1 (t) = expj [0] expj [0] = 1 (5)
It becomes.

The arrival direction estimation unit 23 receives the baseband received signal S _r1b-1 (t) obtained from the received RF signals S _r1-1 (t) and S _r1-k (t) of the transmission / reception devices 10-1 and 10-k. , S _r1b-k (t) is expanded into eigenvalues, and the direction-of-arrival estimated value θpe (t) calculated using the MUSIC (MUltiple Signal Classification) method or the minimum norm method is
θpe (t) = arc [sin θa (t) + (λ _r1 / 2πd _k ) φ _uc-k (t)] (6)
It becomes. The reception IF signals S _r1c-1 (t) and S _r1c-k (t) may be expanded to eigenvalues.

  FIG. 2 shows a simulation result of direction-of-arrival estimation using one received signal received by two antennas. Here, an example of a spectrum response obtained by performing an arrival direction simulation under the conditions of Table 1 is shown, but the arrival direction including an error obtained from one received signal received by two antennas is estimated to be about 40.2 degrees.

(Direction of arrival estimation using two received signals of different frequencies received by one antenna)
A procedure for calculating the direction-of-arrival estimated value using received RF signals S _r1-k (t) and S _r2-k (t) of different frequencies received by the transmitting / receiving apparatus 10-k will be described.

The reception IF signal S _r1c-k (t) corresponding to the reception RF signal S _r1-k (t) is expressed by the following equation (3). Similarly, the received IF signal S _r2c-k (t) corresponding to the received RF signal S _r2-k (t) is based on the phase of S _r2c-1 (t).
S _r2c−k (t) = expj [2π (f _r2 −f _t ) t + (2πd _k / λ _r2 ) sin θa (t) −φ _uc−k (t)] (7)
It becomes.

The baseband received signal S _r2b-k (t) generated by inputting the received IF signal S _r2c-k (t) to the baseband conversion unit 22 of the phase control device 20 is the _Sr2c-1 (t) With reference to phase
S _r2b-k (t) = expj [(2πd _k / λ _r2 ) sin θa (t)] expj [−φ _uc-k (t)] (8)
It becomes.

The arrival direction estimation unit 23 obtains the baseband received signal S _r1b-k (t of the equation (4) obtained from the received RF signals S _r1-k (t) and S _r2-k (t) of the transmission / reception device 10-k. ) And (8), the correct arrival direction θa (t) can be obtained by performing eigenvalue expansion on the baseband received signal S _r2b-k (t) and estimating the arrival direction. Incidentally, it may be configured to expand eigenvalues (3) received IF signal S _R1c-k of formula (t) and (7) the reception of formula IF signal S _r2c-k (t).

  FIG. 3 shows a simulation result of direction-of-arrival estimation using two received signals of different frequencies received by one antenna. Here, a spectrum response example is shown in which the direction of arrival simulation is performed under the conditions of Table 1. However, the direction of arrival obtained from two received signals received by one antenna cancels the error component, and the direction of arrival is exactly 40 degrees. It is estimated to be.

  The error comparison unit 24 of the phase control device 20 compares the correct arrival direction θa (t) obtained by the arrival direction estimation unit 23 with the arrival direction θpe (t) including the error, and the arrival direction θpe ( The phase of the transmission IF signal transmitted to the transmission / reception device 10-k is adjusted by controlling the transmission phase setting unit 21 so that the error component of the second term of t) becomes small. Thereby, the phase variation of the UC 12 of the transmission / reception device 10-k and the path length variation with the satellite can be compensated simultaneously.

FIG. 4 shows a configuration of a tracking antenna apparatus according to a second embodiment of the present invention.
In FIG. 4, the tracking antenna device of the present embodiment is configured by a transmission / reception device 10-k (k = 1 to N, N is an integer of 2 or more), a phase control device 20 and a modulation / demodulation device (omitted in FIG. 4). .

The difference from the first embodiment is that the function of the UC 12 of the transmission / reception device 10-k is moved to the phase control device 20. The phase control device 20 includes a frequency converter 16-k corresponding to the transmission / reception device 10-k, and transmits / receives a transmission RF signal S _tk (t) frequency-converted using a local signal output from the common local oscillator 17. Send to device 10-k. The transmission / reception device 10-k transmits the input transmission RF signal S _tk (t) from the antenna unit 11 to the satellite via the amplifier 14 and also inputs the transmission RF signal S _tk as a local signal. Used for frequency conversion of received RF signals S _r1 and S _r2 .

  In this configuration, since the local oscillator 17 common to each transmission / reception device 10-k is used, the phase fluctuation generated in the UC 12 of each transmission / reception device 10-k is avoided as in the first embodiment. However, there is a possibility that phase fluctuation due to the influence of temperature or the like may occur in the path (cable) from the phase control device 20 to each transmission / reception device 10-k. Therefore, the path phase fluctuation and the path length fluctuation with the satellite as in the first embodiment can be compensated simultaneously.

10, 50 Transceiver 11, 51 Antenna unit 12, 52 Frequency up-converter (UC)
DESCRIPTION OF SYMBOLS 13 Frequency converter 14,15 Amplifier 20,60 Phase control apparatus 21 Transmission phase setting part 22 Baseband conversion part 23 Arrival direction estimation part 24 Error comparison part 53 Frequency down-converter (DC)
70 modem

Claims (4)

In a tracking antenna device that transmits a transmission IF signal from a phase control device to a plurality of transmission / reception devices, and transmits a transmission RF signal obtained by frequency-converting the transmission IF signal in each transmission / reception device from an antenna unit at a predetermined phase,
The plurality of transmission / reception devices receive a first reception RF signal and a second reception RF signal of different frequencies simultaneously transmitted from the same device, and frequency-convert each reception RF signal using the transmission RF signal as a local signal. , The first frequency conversion signal and the second frequency conversion signal are sent to the phase control device,
The phase control device includes:
First arrival direction estimation means for expanding eigenvalues of the first frequency conversion signals respectively input from a reference transmission / reception device and a control target transmission / reception device, and estimating a first arrival direction in the control target transmission / reception device; ,
Second arrival direction estimation for estimating a second arrival direction in the transmission / reception device to be controlled by expanding eigenvalues of the first frequency conversion signal and the second frequency conversion signal input from the transmission / reception device to be controlled Means,
Transmission phase setting means for setting a phase of the transmission IF signal to be transmitted to the transmission / reception device to be controlled in a direction in which a difference between the first arrival direction and the second arrival direction is reduced. A characteristic tracking antenna device. In a tracking antenna device that inputs a transmission RF signal from a phase control device to a plurality of transmission / reception devices, and transmits the transmission RF signal from the antenna unit at a predetermined phase by each transmission / reception device,
The plurality of transmission / reception devices receive a first reception RF signal and a second reception RF signal of different frequencies simultaneously transmitted from the same device, and frequency-convert each reception RF signal using the transmission RF signal as a local signal. , The first frequency conversion signal and the second frequency conversion signal are sent to the phase control device,
The phase control device includes:
A frequency conversion means for frequency-converting a transmission IF signal to the transmission RF signal,
First arrival direction estimation means for expanding eigenvalues of the first frequency conversion signals respectively input from a reference transmission / reception device and a control target transmission / reception device, and estimating a first arrival direction in the control target transmission / reception device; ,
Second arrival direction estimation for estimating a second arrival direction in the transmission / reception device to be controlled by expanding eigenvalues of the first frequency conversion signal and the second frequency conversion signal input from the transmission / reception device to be controlled Means,
Transmission phase setting means for setting a phase of the transmission RF signal transmitted to the transmission / reception device to be controlled in a direction in which a difference between the first arrival direction and the second arrival direction is reduced. A characteristic tracking antenna device. In a transmission phase control method for a tracking antenna apparatus, wherein a transmission IF signal is input from a phase control apparatus to a plurality of transmission / reception apparatuses, and a transmission RF signal obtained by frequency-converting the transmission IF signal by each transmission / reception apparatus is transmitted from an antenna unit at a predetermined phase. ,
The plurality of transmission / reception devices receive a first reception RF signal and a second reception RF signal of different frequencies simultaneously transmitted from the same device, and frequency-convert each reception RF signal using the transmission RF signal as a local signal. , And send to the phase control device as a first frequency conversion signal and a second frequency conversion signal,
The phase control device includes:
Eigenvalue expansion of the first frequency conversion signal input from each of the reference transmission / reception device and the control-target transmission / reception device, and the first arrival direction in the control-target transmission / reception device is estimated;
Eigenvalue expansion of the first frequency conversion signal and the second frequency conversion signal input from the transmission / reception apparatus to be controlled, and estimating a second arrival direction in the transmission / reception apparatus to be controlled;
The phase of the transmission IF signal transmitted to the transmission / reception device to be controlled is set in a direction in which the difference between the first arrival direction and the second arrival direction is reduced. Phase control method. In a transmission phase control method for a tracking antenna device, a transmission RF signal is input from a phase control device to a plurality of transmission / reception devices, and each transmission / reception device transmits a transmission RF signal from an antenna unit at a predetermined phase.
The plurality of transmission / reception devices receive a first reception RF signal and a second reception RF signal of different frequencies simultaneously transmitted from the same device, and frequency-convert each reception RF signal using the transmission RF signal as a local signal. , And send to the phase control device as a first frequency conversion signal and a second frequency conversion signal,
The phase control device includes:
The transmission IF signal is frequency-converted to the transmission RF signal and sent to each transmitting / receiving device,
Eigenvalue expansion of the first frequency conversion signal input from each of the reference transmission / reception device and the control-target transmission / reception device, and the first arrival direction in the control-target transmission / reception device is estimated;
Eigenvalue expansion of the first frequency conversion signal and the second frequency conversion signal input from the transmission / reception apparatus to be controlled, and estimating a second arrival direction in the transmission / reception apparatus to be controlled;
The phase of the transmission RF signal transmitted to the transmission / reception device to be controlled is set in a direction in which the difference between the first arrival direction and the second arrival direction becomes smaller. Phase control method.

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