JP5659955B2 - Signal transmission device, radar device, signal transmission method, and radar detection method - Google Patents

Description

  The present invention relates to a signal transmission device, a radar device, a signal transmission method, and a radar detection method, and in particular, a signal transmission device, a radar device, and a signal transmission method for switching and transmitting a pulse signal and a continuous wave (CW) signal. And a radar detection method.

  A radar device generally detects the presence of a target by irradiating a space with radio waves and receives a reflected signal from the target, and observes its position, movement state, and the like. In the radar apparatus, the radio wave is irradiated from the antenna to the space, is reflected by hitting the target, is received by the antenna again, and is output as a radar reception signal to the receiver or the like. The radar reception signal is frequency-converted by the receiver and then A / D converted, and the digital reception signal is subjected to various signal processing and data processing.

  There are various classification methods for the radar apparatus, and one of them is classification as a pulse radar apparatus and a continuous wave (CW) radar apparatus. The pulse radar device performs transmission and reception alternately, and the transmission signal is a pulse signal. The pulse radar device does not receive the pulse signal during transmission, and does not transmit the pulse signal during reception. . On the other hand, the CW radar apparatus is a radar apparatus that transmits a CW signal, and performs reception even during transmission.

  The pulse radar device and the CW radar device have advantages and disadvantages, respectively, and are selectively used depending on the application. For example, a CW radar apparatus has a limitation in reception sensitivity due to leakage of a transmission signal to a receiver, and is not suitable for long-distance observation. On the other hand, since the pulse radar apparatus does not have this problem, the pulse radar apparatus is generally used for long-distance observation.

  In addition, the pulse radar device has an advantage of high distance resolution, but there is a problem that a short-range target cannot be detected because it is not received during transmission. On the other hand, although the CW radar apparatus has a low distance resolution, it can detect a target at a short distance and has an advantage of high accuracy in observing the Doppler frequency.

  In surveillance radars, etc., it is required for radar equipment depending on the situation, such as when it is desired to detect a long-distance target and a short-distance target at the same time, or to observe the target speed, that is, the Doppler frequency with high accuracy. Functional performance may change. In this case, a radar device having functions of both a pulse radar device and a CW radar device is effective.

  A radar apparatus having functions of both a pulse radar apparatus and a CW radar apparatus is disclosed in Patent Document 1. FIG. 10 shows a block diagram of the radar apparatus of Patent Document 1. In FIG. 10, the radar apparatus of Patent Document 1 includes an antenna 980A having antenna elements 981 to 98m and an antenna 980B having antenna elements 98 (m + 1) to 98n.

  In the radar apparatus of Patent Document 1, when the switching controller 910 outputs a mode selection signal for designating the pulse radar mode, the transmission / reception switching unit 920 uses the transmission block forming unit 940 to transmit the transmission signal from the transmitter 930 to the antenna. Output to both 980A and antenna 980B. Also, reception signals from both the antenna 980A and the antenna 980B are received by the reception block forming unit 950, and the received signals are combined by the power combiner 960, and then output to the receiver 970.

  On the other hand, when the switching controller 910 outputs a mode selection signal designating the CW radar mode, the transmission / reception switch 920 controls the antenna 980A and the antenna 980B to be dedicated to transmission or reception, respectively. For example, antenna 980A is used exclusively for transmission, and antenna 980B is used exclusively for reception.

JP-A-6-249944

  However, the technique of Patent Document 1 cannot be applied to a radar apparatus using a transmitter with a limited transmission duty. The transmission duty is a ratio of transmission time to radar operation time (total of transmission time and reception time). In the case of CW radar operation, the transmission duty is 1, but in the case of a transmitter based on pulse radar operation, the transmission duty is often limited to a value smaller than 1. When a transmitter whose transmission duty is restricted to a value smaller than 1 is used, a CW signal cannot be transmitted.

  In view of the above problems, the object of the present invention is to switch between pulse radar operation and CW radar operation even when a transmitter that cannot transmit a CW signal due to restrictions on transmission duty or the like is used. It is an object to provide a signal transmission device, a radar device, a signal transmission method, and a radar detection method.

  In order to achieve the above object, a signal transmission apparatus according to the present invention receives an operation mode designating means for outputting a mode designating signal designating either a pulse mode or a CW mode, and a mode designating signal designating a pulse mode. When the mode designation signal for designating the CW mode is inputted, the timing signal output means for outputting the timing signal and the mode designation signal for designating the pulse mode are all inputted. When a mode designation signal for designating the CW mode is input to the signal generation means, a timing control means for inputting the output timing signals to the signal generation means one by one, and a mode designation signal for designating the pulse mode are input. If a pulse signal having a pulse width t is input, a mode specifying signal specifying the CW mode is input. The CW signal with comprising the n number of signal generation means for generating and outputting each timing signal is input, a signal transmitting means for transmitting a signal output from the signal generating means to the external space, the.

  In order to achieve the above object, a radar apparatus according to the present invention includes the above-described signal transmission apparatus, a signal reception unit that receives a signal returned from a signal transmitted from the signal transmission apparatus as a reception signal, and A signal receiving device including target data generating means for generating and outputting target data from the received signal received based on the mode designation signal and the timing signal.

  In order to achieve the above object, a signal transmission method according to the present invention is a signal transmission method using a signal transmission device provided with n signal generation means, and designates either a pulse mode or a CW mode. When the mode designation signal is output and the mode designation signal for designating the pulse mode is inputted, the timing signal is outputted at the cycle T, and when the mode designation signal for designating the CW mode is inputted, the timing signal is outputted at the cycle a. When the mode designation signal to be designated is input, the output timing signals are sequentially inputted to the signal generation means one by one when all the signal generation means are inputted, and when the mode designation signal to designate the CW mode is inputted, one by one. When a mode designation signal for designating a pulse mode is input to the signal generation means, a pulse signal having a pulse width t is inputted, and a mode designation signal for designating a CW mode is inputted. The CW signal for the period a when you, then output the generated for each timing signal is input, transmits the signal output from the signal generating means to the external space.

  In order to achieve the above object, a radar detection method according to the present invention is a radar detection method using a radar apparatus provided with n signal generation means, and a mode for designating either a pulse mode or a CW mode. Outputs the specified signal and outputs the timing signal at the cycle T when the mode specifying signal specifying the pulse mode is input, and at the cycle a when the mode specifying signal specifying the CW mode is input, and specifies the pulse mode When the mode designation signal to be input is input, the output timing signals are sequentially input to the signal generation means one by one when all the signal generation means are input, and when the mode specification signal specifying the CW mode is input, When a mode designation signal for designating a pulse mode is input to the signal generation means, a pulse signal having a pulse width t is inputted, and a mode designation signal for designating a CW mode is inputted. When the timing signal is input, the CW signal is generated and output every time the timing signal is input, the signal output from the signal generating means is irradiated to the external space, and the irradiated signal is reflected and returned. The received signal is received as a received signal, and target data is generated from the received signal and output based on the mode designation signal and the timing signal.

  With the above configuration, the signal transmission device, the radar device, the signal transmission method, and the radar detection method according to the present invention use signal generation means that cannot transmit a CW signal due to limitations on transmission duty and the like. Even in this case, the pulse radar operation and the CW radar operation can be switched.

It is an example of the block block diagram of the transmitter 10 which concerns on the 1st Embodiment of this invention. .., 5n output from the timing control unit 40 according to the first embodiment of the present invention to the signal generation units 51, 52,..., 5n, an example of the timing signal in (a) pulse mode and (b) CW mode. FIG. 4 shows an example of signals output from the signal generation means 51, 52, 53, 54 and the signal transmission means 60 according to the first embodiment of the present invention in (a) pulse mode and (b) CW mode. FIG. From the signal transmission means 60 according to the first embodiment of the present invention and the signal transmission means 61, 62,..., 6n according to the modification of the first embodiment, (a) in pulse mode, (b) CW mode It is a figure which shows an example of the signal output at the time.

It is an example of the block block diagram of the radar apparatus 100 which concerns on the 2nd Embodiment of this invention. It is an example of the operation | movement flowchart until radio wave irradiation of the radar apparatus 100 which concerns on the 2nd Embodiment of this invention. It is an example of the operation | movement flowchart from the electromagnetic wave reception to target data output of the radar apparatus 100 which concerns on the 2nd Embodiment of this invention. It is an example of the block block diagram of the radar apparatus 100B which concerns on the modification of the 2nd Embodiment of this invention. It is an example of the block block diagram of the radar apparatus 100C which concerns on another modification of the 2nd Embodiment of this invention. It is a block block diagram of the radar apparatus which concerns on patent document 1.

(First embodiment)
A transmission apparatus according to the first embodiment of the present invention will be described. FIG. 1 shows an example of a block configuration diagram of a transmission apparatus 10 according to the present embodiment. 1, the transmission apparatus 10 includes an operation mode designation unit 20, a timing signal output unit 30, a timing control unit 40, n signal generation units 51, 52,..., 5n and a signal transmission unit 60.

  The operation mode designating unit 20 generates a mode designating signal for designating either the pulse mode or the CW mode, and outputs it to the timing signal output unit 30, the timing control unit 40, and the signal generation units 51, 52,. .

  The timing signal output means 30 outputs a timing signal having a period T to the timing control means 40 when a mode designation signal for designating a pulse mode is inputted from the operation mode designation means 20 and a mode designation signal for designating the CW mode is inputted. In this case, the timing signal having the period a is output to the timing control means 40.

  The timing control means 40 inputs the timing signal output from the timing signal output means 30 to the signal generation means 51, 52,..., 5n according to the mode specification signal input from the operation mode specification means 20.

  Timing when the timing control unit 40 according to the present embodiment inputs the timing signal to the signal generation units 51, 52,..., 5n will be described with reference to FIG. FIG. 2A is an example of a timing signal input to each signal generation unit in the pulse mode, and FIG. 2B is an example of a timing signal input to each signal generation unit in the CW mode.

  In FIG. 2A, in the pulse mode, the timing control means 40 inputs the timing signal of the period T output from the timing signal output means 30 to all signal generation means. On the other hand, in FIG. 2B, in the CW mode, the timing control unit 40 sequentially outputs the timing signals of the period a output from the timing signal output unit 30 one by one to the signal generation units 51, 52,. To input. Here, in the pulse mode, the timing control unit 40 generates a pulse signal having a pulse width t every time a timing signal is input and outputs the pulse signal to the signal transmission unit 60. On the other hand, in the CW mode, every time a timing signal is input, a CW signal is generated for the period a and output to the signal transmission means 60. In this embodiment, the pulse width t and the number n of signal generation means are set so that t / T and 1 / n are smaller than the duty constraint values of the signal generation means 51, 52,.

  The signal transmission means 60 combines the signals output from the signal generation means 51, 52,..., 5n and transmits them to the external space. In the present embodiment, in the CW mode, the signal transmission unit 60 matches the phase so that the phase of each CW signal output from the signal generation units 51, 52,..., 5n does not become discontinuous, Synthesize and send to external space.

  The operation of the transmission device 10 will be described with a specific example. Hereinafter, the case where the transmission apparatus 10 includes four signal generation units having a duty constraint value of 30% will be described with reference to FIG. FIG. 3 shows an example of signals output from the signal generation means 51, 52, 53, and 54 in (a) pulse mode and (b) CW mode, and transmission transmitted from the signal transmission means 60 to the external space. It is an example of a signal.

  As shown in FIG. 3A, in the pulse mode, the signal generating means 51, 52, 53, 54 outputs a pulse signal having a pulse width t to the signal transmitting means 60 every period T, and the signal transmitting means 60 A composite signal (pulse signal) of four pulse signals is transmitted to the external space every period T. The power of the combined signal is four times the power of the pulse signal output from each signal generating means 51, 52, 53, 54. After the operation time t, a pause time that is four times the operation time is set, so the transmission duty (t / T) is 20%, which satisfies the transmission duty constraint value of 30%.

  On the other hand, as shown in FIG. 3B, in the CW mode, the signal generating means 51, 52, 53, and 54 output the CW signal of period a with a time a shift. Since the output of the CW signal from the signal generating means 52 is started simultaneously with the end of the output of the CW signal from the signal generating means 51, a continuous wave (CW) signal is sent from the signal transmitting means 60 to the external space. Sent. The transmission power at each time of the generated CW signal is equivalent to a single signal generating means and is smaller than that in the pulse mode. On the other hand, since the pause time of (n−1) · a is set after the operation time a, the transmission duty (1 / n) is 25%, and the constraint value 30% of the transmission duty of the signal generation means is reduced. Satisfied.

  As described above, the transmission device 10 according to the present embodiment includes a plurality of signal generation units 51, 52,..., 5n, and in the pulse mode, all the signal generation units 51, .., 5n, and in the case of the CW mode, the timing signals of period a are sequentially input to the signal generating means 51, 52,. The signal generators 51, 52,..., 5n synthesize the signals output each time a timing signal is input and transmit the synthesized signals to the external space.

  As a result, the transmission apparatus 10 according to the present embodiment switches the pulse mode and the CW mode even when signal generation means that cannot generate a CW signal due to restrictions on transmission duty or the like is used. Alternatively, the CW signal can be transmitted to the external space.

(Modification of the first embodiment)
A modification of the first embodiment will be described. The transmitting apparatus 10B according to the present embodiment replaces the signal transmitting means 60 of FIG. 1 described in the first embodiment with n signal transmitting means 61 in the subsequent stage of the signal generating means 51, 52,. 62n are arranged. In the transmission device 10B, the signal transmission units 61, 62,..., 6n irradiate the external space with the signals output from the corresponding signal generation units 51, 52,.

  FIG. 4 shows transmissions transmitted from the signal transmission means 60 (first embodiment) and the signal transmission means 61, 62,..., 6n (this embodiment) in the (a) pulse mode and (b) CW mode. An example of a signal is shown.

  4, in the pulse mode, although the frequency of use of each signal transmission means is equal, the transmission power of each signal emitted from the signal transmission means 61, 62,..., 6n according to this embodiment is the same as that of the first embodiment. It is smaller than the transmission power of the signal emitted from the signal transmission means 60 according to the above. On the other hand, in the CW mode, although the transmission power per unit time of each signal transmission unit is equal, the frequency of use of the signal transmission units 61, 62,..., 6n according to this embodiment is the signal transmission according to the first embodiment. The frequency of use of the means 60 is lower.

  The radar apparatus 100B according to the present embodiment has a demerit that each signal transmission unit has low transmission power or frequency of use and is inefficient. On the other hand, the signal transmission means according to the present embodiment has low transmission power and does not need to perform processing for synthesizing transmission signals from the signal generation means 51, 52,. It has the merit that a signal generation means can be applied.

(Second Embodiment)
A second embodiment will be described. An example of a block diagram of the radar apparatus 100 according to this embodiment is shown in FIG. 5, the radar apparatus 100 according to the present embodiment includes a mode control signal generator 110, a timing signal generator 120, transmission antennas 130-1 to 130-L, and a signal processor 140.

  The mode control signal generator 110 generates a mode control signal corresponding to the acquired mode selection signal by acquiring a mode selection signal for selecting either one of the pulse radar operation and the CW radar operation from the outside. , Output to the timing signal generator 120, the transmission antennas 130-1 to 130 -L and the signal processor 140.

  When the mode control signal for pulse radar operation is input from the mode control signal generator 110, the timing signal generator 120 outputs a timing signal having a period T to the transmission antennas 130-1 to 130-L and the signal processor 140. On the other hand, when a mode control signal for CW radar operation is input from the mode control signal generator 110, the timing signal generator 120 outputs a timing signal of period a to the transmission antennas 130-1 to 130 -L and the signal processor 140. To do.

  The transmission antennas 130-1 to 130-L include transmission modules 131-1 to 131-N, phase correctors 132-1 to 132-N, a selection synthesizer 133, a distributor 134, and antenna elements 135-1 to 135-M. In the case of pulse radar operation, a pulse signal is generated and irradiated to the external space, and in the case of CW radar operation, a CW signal is generated and irradiated to the external space.

  In the case of pulse radar operation, the transmission antenna 130-1 inputs the timing signal of the period T input from the timing signal generator 120 to all the transmission modules 131-1 to 131-N. On the other hand, in the case of CW radar operation, the timing signals having the period a input from the timing signal generator 120 are sequentially input to the transmission modules 131-1 to 131-N one by one.

  In the pulse radar operation, the transmission modules 131-1 to 131-N generate and output a pulse signal having a pulse width t every time a timing signal is input. Note that “duty constraint value ≧ t / T”. On the other hand, in the case of CW radar operation, every time a timing signal is input, a CW signal is generated and output for period a. In the present embodiment, the duty constraint value of the transmission module and the number N of transmission modules have a relationship of “duty constraint value ≧ 1 / N”.

  The phase correctors 132-1 to 132-N are arranged at the subsequent stage of the transmission modules 131-1 to 131-N, respectively, and correct the phase of the CW signal output from the transmission modules 131-1 to 131-N.

  The selective combiner 133 combines the signals output from the phase correctors 132-1 to 132-N and outputs the combined signals to the distributor 134. The distributor 134 equally distributes the combined signals to the antenna elements 135-1 to 135-1. Output to 135-M. The antenna elements 135-1 to 135-M radiate the distribution signal output from the distributor 134 to the external space as radio waves.

  Here, in FIG. 5, the detailed block configuration diagram is shown only for the transmission antenna 130-1, but the other transmission antennas 130-2 to 130 -L are configured similarly. The transmission antennas 130-1 to 130-L operate in the same operation mode and timing.

  In FIG. 5, the signal processor 140 includes a reception antenna 141, a receiver 142, a switch 143, a pulse radar processor 144, a CW radar processor 145, and a selector 146, receives radio waves, and analyzes the received radio waves. By doing so, the target data is output.

  The reception antenna 141 receives the radio waves that are transmitted from the transmission antennas 130-1 to 130 -L and reflected from the target or the like and returned to the receiver 142.

  The receiver 142 performs reception processing such as frequency conversion on the radio wave received by the reception antenna 141 using the mode control signal input from the mode control signal generator 110 and the timing signal input from the timing signal generator 120 to receive the radio wave. The signal is output to the switch 143 as a signal.

  The switch 143 switches the reception signal output from the receiver 142 to the pulse radar processor 144 or the CW radar processor 145 according to the operation mode, and outputs it.

  The pulse radar processor 144 performs signal processing and data processing corresponding to the pulse radar operation on the input received signal, and outputs the result to the selector 146. The CW radar processor 145 performs signal processing and data processing corresponding to the CW radar operation on the input received signal, and outputs the signal to the selector 146. The selector 146 selects a processing result according to the operation mode and outputs it as target data.

  Next, the operation of the radar apparatus 100 according to this embodiment will be described. FIG. 6 shows an example of an operation flowchart until the radar apparatus 100 according to the present embodiment emits radio waves, and FIG. 7 shows an example of an operation flowchart until radio waves are received and target data is output.

  In FIG. 6, the radar apparatus 100 according to the present embodiment performs the following operation by acquiring a mode selection signal for selecting either one of the pulse radar operation and the CW radar operation from the outside (S101). .

  When the mode control signal generator 110 obtains a pulse radar operation mode selection signal (pulse radar operation in S102), the mode control signal generator 110 generates a mode control signal for the pulse radar operation, and generates a timing signal generator 120 and a transmission antenna 130-1. To 130-L and the signal processor 140 (S103), the timing signal generator 120 outputs a timing signal of period T to the transmission antennas 130-1 to 130-L and the signal processor 140 (S104).

  The timing signals of period T input to the transmission antennas 130-1 to 130-L are input to all the transmission modules 131-1 to 131-N (S105), and the transmission modules 131-1 to 131-N receive the timing signals. Is input and is output to the selection synthesizer 133 (S106).

  On the other hand, when the mode control signal generator 110 acquires the mode control signal for the CW radar operation (CW radar operation in S102), the mode control signal generator 110 generates the mode control signal for the CW radar operation, and generates the timing signal generator 120 and the transmission antenna 130. -1 to 130-L and the signal processor 140 (S107), the timing signal generator 120 outputs the timing signal of period a to the transmission antennas 130-1 to 130-L and the signal processor 140 (S108). ).

  The timing signals of the period a input to the transmission antennas 130-1 to 130-L are sequentially input to the transmission modules 131-1 to 131-N one by one (S109), and the transmission modules 131-1 to 131-N Each time a timing signal is input, a CW signal is generated and output for period a (S110). Each of the output CW signals is corrected in phase by the phase correctors 132-1 to 132-N, and then output to the selection synthesizer 133 (S111).

  The selective combiner 133 combines the signals output from the transmission modules 131-1 to 131-N and outputs the combined signals to the distributor 134 (S112), and the distributor 134 equally distributes the input combined signal to the antenna element 135. Output to -1 to 135-M (S113). The antenna elements 135-1 to 135-M radiate the distribution signal input from the distributor 134 to the external space as radio waves (S114).

  On the other hand, in FIG. 7, the reception antenna 141 of the radar apparatus 100 according to the present embodiment receives radio waves incident from the external space and outputs them to the receiver 142 (S201). The receiver 142 receives the radio wave output from the reception antenna 141 based on the mode control signal and the timing signal, and outputs the received signal to the switch 143 (S202).

  In the case of a pulse radar operation (pulse radar operation in S203), the switch 143 outputs the processing signal output from the receiver 142 to the pulse radar processor 144, and the pulse radar processor 144 converts the input received signal into the received signal. On the other hand, signal processing and data processing corresponding to the pulse radar operation are performed and output to the selector 146 (S204).

  On the other hand, in the case of CW radar operation (CW radar operation in S203), the switch 143 outputs the processing signal output from the receiver 142 to the CW radar processor 145, and the CW radar processor 145 converts the input received signal into the received signal. On the other hand, signal processing and data processing corresponding to the CW radar operation are performed and output to the selector 146 (S205).

  The selector 146 selects the signals input from the pulse radar processor 144 and the CW radar processor 145 according to the operation mode, and outputs them as target data (S206).

  As described above, the radar apparatus 100 according to the present embodiment is configured to synthesize and radiate outputs from a plurality of transmission modules. The radar apparatus 100 controls the transmission timing of each transmission module in accordance with the operation mode, and each transmission module operates with a predetermined transmission duty or less even during CW radar operation. Therefore, even when a transmission module that cannot transmit CW signals due to restrictions on transmission duty or the like is used, the pulse radar operation and the CW radar operation can be switched to operate.

  Further, the signal output from the transmission module is synthesized using the selection synthesizer 133, and then equally distributed in accordance with the number of antenna elements using the distributor 134, so that the number of antenna elements is determined by the radar apparatus. Can be set optimally according to the purpose of use.

(Modification of the second embodiment)
A modification of the second embodiment will be described. An example of a block diagram of the radar apparatus 100B according to this embodiment is shown in FIG. In this embodiment, instead of inputting a mode selection signal from the outside, the radar apparatus 100B automatically switches between the pulse radar operation and the CW radar operation.

  The radar apparatus 100B according to the present embodiment illustrated in FIG. 8 is obtained by changing the signal processor 140 to the signal processor 140B in the radar apparatus 100 according to the second embodiment illustrated in FIG. Specifically, the selector 146 is replaced with a data combiner 147 and a beam controller 148 is added.

  The radar apparatus 100B according to the present embodiment normally performs a pulse radar operation. The beam controller 148 monitors the output from the pulse radar processor 144, and when target data is included in the output from the pulse radar processor 144, a mode for switching from pulse radar operation to CW radar operation. A selection signal is generated and output to the mode control signal generator 110.

  The data combiner 147 combines the target Doppler frequency obtained by the CW radar operation with the data obtained by the pulse radar operation and outputs it as target data.

  The radar apparatus 100B according to the present embodiment can automatically switch between the pulse radar operation and the CW radar operation, and acquire mutual effective data. The radar apparatus 100B can achieve both the distance resolution and long-range detection capability of pulse radar operation and the Doppler frequency measurement accuracy and short-range detection capability of CW radar operation.

  Another modification of the second embodiment will be described. An example of a block configuration diagram of the radar apparatus 100C according to the present embodiment is shown in FIG. In the present embodiment, the same number of transmission modules, phase correctors, and antenna elements are arranged and correspond one-on-one. The radar apparatus 100C according to the present embodiment illustrated in FIG. 9 is obtained by changing the transmission antenna 130 to the transmission antenna 130C in the radar apparatus 100 according to the second embodiment illustrated in FIG. Specifically, the selection synthesizer 133 and the distributor 134 are deleted, and the same number of transmission antennas 135C-1 to 135C-N as the transmission modules and phase correctors are placed after the phase correctors 132-1 to 132-N. Arranged.

  In the radar apparatus 100C, in the pulse radar operation, each antenna element 135-1 to 135-N outputs a signal corresponding to a single transmission module, and the combined transmission power of the radio wave is a single transmission module. N times. On the other hand, in the CW radar operation, the transmission modules 131-1 to 131-N are sequentially switched to output CW signals, but the antenna elements 135-1 to 135-N have a one-to-one correspondence with the transmission modules. Therefore, the antenna elements 135-1 to 135-N to be transmitted are also sequentially switched, and as a result, the CW signal is emitted from the radar apparatus 100C.

  The radar apparatus 100C according to the present embodiment has a demerit that the number of radio waves emitted from each antenna element is reduced and the antenna gain is low in the CW radar operation. On the other hand, there is no need for a selective synthesizer or distributor, and there is an advantage that the structure of the transmission antenna can be simplified.

10, 10B transmission device 20 operation mode designation means 30 timing signal output means 40 timing control means 51, 52, ..., 5n signal generation means 60, 61, 62, ..., 6n signal transmission means 100, 100B, 100C Radar apparatus 110 mode Control signal generator 120 Timing signal generator 130, 130C Transmission antenna 131 Transmission module 132 Phase corrector 133 Selective combiner 134 Divider 135, 135C Antenna element 140, 140B Signal processor 141 Reception antenna 142 Receiver 143 Switch 144 Pulse Radar processor 145 CW radar processor 146 Selector 147 Data combiner 148 Beam controller

Claims (10)

An operation mode designating means for outputting a mode designating signal designating either the pulse mode or the CW mode;
A timing signal output means for outputting a timing signal at a period T when a mode designation signal designating a pulse mode is inputted, and at a period a when a mode designation signal designating a CW mode is inputted;
When the mode designation signal for designating the pulse mode is inputted, all the signal generation means are inputted. When the mode designation signal for designating the CW mode is inputted, the outputted timing signals are sequentially given to the signal production means one by one. Timing control means for input;
A pulse signal having a pulse width t is generated when a mode specifying signal specifying a pulse mode is input, and a CW signal is generated for a period a when a mode specifying signal specifying a CW mode is input, every time the timing signal is input. N signal generating means for outputting
Signal transmitting means for transmitting the signal output from the signal generating means to an external space;
A signal transmission device comprising: The signal transmitting apparatus according to claim 1, wherein 1 / n and t / T are smaller than a duty constraint value of the signal generation unit. 3. The signal transmission device according to claim 1, further comprising a phase matching unit that is arranged in a preceding stage of the signal transmission unit and outputs the CW signal output from the n signal generation units after matching the phases thereof. The signal transmission device according to claim 3 , further comprising a combining unit that is arranged in a preceding stage of the signal transmitting unit and combines and outputs the signals output from the phase matching unit .

2 or more of the signal transmission means,
The signal transmission apparatus according to claim 4, further comprising a distribution unit that distributes the signal output from the combining unit to the two or more signal transmission units. N signal transmission means are provided;
The signal transmitting means outputs the signal output from the corresponding signal generating means to an external space;
The signal transmission device according to claim 1. The signal transmission device according to any one of claims 1 to 6,
Signal receiving means for receiving a signal returned from the signal transmitted from the signal transmitting device as a received signal, and generating target data from the received signal based on the mode designation signal and the timing signal A signal receiving device comprising target data generating means for outputting,
A radar apparatus comprising: The signal transmitting device obtains the target data from the signal receiving device;
The radar apparatus according to claim 7, wherein the operation mode designating unit generates and outputs the mode designating signal based on the acquired target data. A signal transmission method using a signal transmission device provided with n signal generation means,
Outputs a mode designation signal that designates either pulse mode or CW mode,
The timing signal is output with a period T when a mode specifying signal specifying a pulse mode is input, and with a period a when a mode specifying signal specifying a CW mode is input,
When a mode designation signal designating a pulse mode is inputted, all the signal generation means are inputted, and when a mode designation signal designating a CW mode is inputted, one by one to the signal generation means sequentially, the outputted timing signal Enter
When a mode designation signal designating a pulse mode is inputted to the n signal generating means, a pulse signal having a pulse width t is inputted, and when a mode designation signal designating a CW mode is inputted, a CW signal is outputted for a period a. Generate and output each time the timing signal is input,
Transmitting the signal output from the signal generating means to an external space;
Signal transmission method. A radar detection method using a radar apparatus provided with n signal generation means,
Outputs a mode designation signal that designates either pulse mode or CW mode,
The timing signal is output with a period T when a mode specifying signal specifying a pulse mode is input, and with a period a when a mode specifying signal specifying a CW mode is input,
When a mode designation signal designating a pulse mode is inputted, all the signal generation means are inputted, and when a mode designation signal designating a CW mode is inputted, one by one to the signal generation means sequentially, the outputted timing signal Enter
When a mode designation signal designating a pulse mode is inputted to the n signal generating means, a pulse signal having a pulse width t is inputted, and when a mode designation signal designating a CW mode is inputted, a CW signal is outputted for a period a. Generate and output each time the timing signal is input,
Irradiate the signal output from the signal generating means to the external space,
Receiving the signal reflected back from the irradiated signal as a received signal;
Based on the mode designation signal and the timing signal, target data is generated from the received reception signal and output.
Radar detection method.

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