JP2010181229A - Field through compensation apparatus, field through compensating antenna, radar apparatus and field through compensation value measurement method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and stably maintain a sufficiently small field through quantity over a wide temperature range in a field through compensation apparatus, a field through compensating antenna, a radar apparatus, and a field through compensation value measurement method. <P>SOLUTION: A system connected to a transmission system and a reception system and having a path for partially and directly transferring a transmission wave from the transmission system to the reception system includes: a parallel path parallel to the path, partially inputting the transmission wave to the reception system, and having a transfer characteristic for suppressing its level; a temperature measurement means for measuring a temperature of the parallel path; a storage means for previously storing a parameter including the quantity for compensating the transfer characteristic and mapped to the operational temperature of the parallel path so as to make an attenuation of the path to be a predetermined threshold value or above in a frequency band of the transmission wave; and a control means for compensating a deviation of the transfer characteristic by using the parameter mapped to the temperature measured by the temperature measurement means and stored in the storage means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a feedthrough compensation device that suppresses the level of a signal leaking from a transmission system to a reception system in a radio device such as a radar, and a feedthrough compensation antenna configured by adding an antenna to the feedthrough compensation device. Further, the present invention relates to a radar apparatus in which the feedthrough compensation device is applied to an antenna system, and a feedthrough compensation value measurement method for measuring parameters necessary for suppressing such a level.

  The FM-CW radar device can efficiently repeat ranging and positioning without setting the range width unnecessarily when the range in which the target position can change is known. It is used in radio altimeters and marine berthing speedometers.

FIG. 12 is a diagram illustrating a configuration example of a radar apparatus to which the FM-CW method is applied.
In the figure, the output of the distance measurement processing unit 51 is connected to the control input of the transmission unit 52, and the output of the transmission unit 52 is connected to the input of the directional coupler 53. A part of the transmission unit 52 is connected to a corresponding input of the distance measurement processing unit 51. The first and second outputs of the directional coupler 53 are connected to the feeding point of the transmission antenna 54T and the input of the anti-fixed phase shifter 55, respectively. The output of the phase shifter 55 is connected to the first input of the synthesizer 58 via an anti-fixed attenuator 56 and a delay circuit 57. The feeding point of the receiving antenna 54R is connected to the second input of the combiner 58, and the output of the combiner 58 is connected to the input of the receiving unit 59. The output of the receiving unit 59 is connected to the input of the distance measurement processing unit 51.

  Note that the transmission antenna 54T and the reception antenna 54R described above are formed as patch antennas with a predetermined shape, size, and arrangement on the same housing or printed circuit board 60, and the directional coupler 53, the phase shifter 55, and the attenuation. The unit 56, the delay circuit 57, and the combiner 58 are disposed on a common housing or printed circuit board 60 together with the transmission antenna 54T and the reception antenna 54R. In addition to the housing or printed circuit board 60, a transmitting antenna 54T, a receiving antenna 54R, a directional coupler 53, a phase shifter 55, an attenuator 56, and a delay circuit 57 are arranged on the housing or printed circuit board 60. The module composed of the synthesizer 58 is hereinafter referred to as an “antenna module” and indicated by a reference numeral “60M”.

In the radar apparatus having such a configuration, the transmission unit 50 repeatedly generates FM-CW waves whose frequencies linearly change in order of time series under the initiative of the distance measurement processing unit 51 to generate a transmission wave. The transmission wave is radiated from the transmission antenna 54T via the directional coupler 53, and after being reflected by a target such as the ground surface, arrives at the reception wave 54R as a reception wave.
The receiving unit 59 receives this received wave via the synthesizer 58. The distance measurement processing unit 51 generates a beat frequency fb between the transmission wave generated by the transmission unit 52 and the reception wave received in this way, and converts it to a distance to the target. Further, the distance measurement processing unit 51 keeps the frequency shift width (ΔF) of the transmission wave constant, and varies the time required for the frequency shift so that the beat frequency fb is constant, thereby the distance to the target. Identify as.

  In addition, a part of the transmission wave fed to the transmission antenna 54T is a propagation path (hereinafter referred to as a path) formed through a space (including a space where the printed circuit board 60 is interposed) between the transmission antenna 54T and the reception antenna 54R. , Simply referred to as a “path”). Hereinafter, the level of the transmission wave transmitted to the reception antenna 54R in this way is referred to as “field through amount”.

The component of the transmission wave transmitted to the receiving antenna 54R in this manner generally decreases the accuracy of the target distance measurement described above or causes malfunction.
In the radar apparatus to which the FM-CW method is applied, the phase shift amount of the phase shifter 55 and the attenuation amount of the attenuator 56 are adjusted to desired values in advance, and the delay time of the delay circuit 57 is the propagation delay time of the path. Is set to be equal to the interval from the directional coupler 53 to the input of the receiving unit 59 via the phase shifter 55, the attenuator 56, the delay circuit 57, and the combiner 58 (hereinafter referred to as “parallel path”). The transfer characteristic of the above path is offset by the transfer characteristic of.

  Therefore, even when the physical distance between the transmission antenna 54T and the reception antenna 54R is small, the isolation between the transmission antenna 54T and the reception antenna 54R is set high, and the distance measurement described above. High accuracy is maintained.

  As related prior art related to the present invention, as disclosed in Patent Document 1 described later, a receiving antenna, a transmitting antenna, an amplifier for receiving signal amplification, and a variable resistance attenuator for controlling transmission power As the equipment is miniaturized, a large radar cross section is realized, and the radar cross section can be varied, so that it can be operated as a different radar reference scatterer and is easy to operate. There is a calibration device.

JP-A-6-230108

  By the way, in the above-described conventional example, due to the restrictions listed below, the transmission characteristics of the parallel paths are hindered from being efficiently achieved, and with high accuracy to a desired value in a wide temperature range where the antenna module 60M should operate. It was difficult to maintain.

(1) The delay time of the attenuator 56 changes according to the attenuation amount set in the attenuator 56.
(2) The attenuation amount of the phase shifter 55 changes according to the phase shift amount set in the phase shifter 55.
(3) The electrical characteristics (relative permittivity and dielectric loss tangent) of the transmitting antenna 54T and the receiving antenna 54R also vary with temperature.

(4) There are variations in the temperature characteristics of the configuration of the transmission antenna 54T and the reception antenna 54R (relative permittivity, dielectric loss tangent, etc., depending on the antenna system) and the relative dielectric constant, dielectric loss tangent, due to the configuration of the parallel path .
(5) The temperature range over which the parallel path should work effectively is over 100 degrees.

  The present invention provides a feedthrough compensation device, a feedthrough compensation antenna, a radar device, and a radar device that can easily and stably maintain a field through amount at a sufficiently small value over a wide temperature range without greatly complicating the configuration. An object of the present invention is to provide a feedthrough compensation value measurement method.

In the feedthrough compensation device according to claim 1, the parallel path is connected to the transmission system and the reception system, and has a path that directly transmits a part of the transmission wave from the transmission system to the reception system. The transmission characteristic is provided in parallel with the path and suppresses a level at which a part of the transmission wave is input to the reception system. The temperature measuring means measures the temperature of the parallel path. The storage means corresponds to the temperature at which the parallel path can operate because the amount of attenuation of the path is equal to or greater than a predetermined threshold in the frequency band of the transmission wave, and the parameter including the amount that the transfer characteristic is to be compensated for. And stored in advance. The control means compensates for the deviation of the transfer characteristic using a parameter stored in the storage means in association with the temperature measured by the temperature measurement means.
That is, even if the temperature of the parallel path changes, the deviation in the transfer characteristics of the parallel path is compensated by using a parameter stored in advance in the storage unit corresponding to the temperature.

In the feedthrough compensating antenna according to the second aspect, the transmission antenna radiates a transmission wave output from the transmission system. The receiving antenna delivers the incoming received wave to the receiving system. A parallel path is provided in parallel with a path that directly transmits a part of the transmission wave from the transmission system to the reception system, and a transfer characteristic that suppresses a level at which a part of the transmission wave is input to the reception system. Have The temperature measuring means measures the temperature of the parallel path. The storage means corresponds to the temperature at which the parallel path can operate because the amount of attenuation of the path is equal to or greater than a predetermined threshold in the frequency band of the transmission wave, and the parameter including the amount that the transfer characteristic is to be compensated for. And stored in advance. The control means compensates for the deviation of the transfer characteristic using a parameter stored in the storage means in association with the temperature measured by the temperature measurement means.
That is, even if the temperature of the parallel path changes, the deviation of the transfer characteristics of the parallel path is compensated by using a parameter stored in advance in the storage unit corresponding to this temperature.

In the radar device according to a third aspect, the transmission system and the reception system are connected to the feedthrough compensation device according to the first aspect. The reception system performs ranging or positioning of a target that is a source of the reception wave based on a correlation between the transmission wave transmitted by the transmission system and the reception wave that has arrived at the reception system.
That is, the band of the received wave received by the receiving system is not limited, and the component of the transmitted wave transmitted from the transmitting system to the receiving system is stably and accurately suppressed over a wide range of temperatures.

In the radar device according to a fourth aspect, the transmission system and the reception system are connected to the feedthrough compensation antenna according to the second aspect. The reception system performs ranging or positioning of a target that is a source of the reception wave based on a correlation between the transmission wave transmitted by the transmission system and the reception wave that has arrived at the reception system.
That is, the band of the received wave received by the receiving system is not limited, and the component of the transmitted wave transmitted from the transmitting system to the receiving system is stably and accurately suppressed over a wide range of temperatures.

In the feedthrough compensation value measuring method according to claim 5, the temperature at which the feedthrough compensation device according to claim 1 operates is set in a stepwise manner and stored in advance in storage means provided in the feedthrough compensation device. The power parameter is measured.
In other words, in an electronic apparatus in which the feedthrough compensation device according to any one of claims 1 to 3 is mounted, in order to maintain high isolation between the transmission system and the reception system over a wide range of temperatures. The necessary parameters are pre-measured and incorporated using the feedthrough compensation device.

  In the present invention, the band of the reception wave received by the reception system is not limited, and the component of the transmission wave transmitted from the transmission system to the reception system via the path is transmitted from the transmission system via the parallel path. By being combined with the component of the transmitted wave transmitted in parallel, it is suppressed stably and accurately over a wide range of temperatures.

Further, the radar apparatus according to the present invention can stably perform ranging and positioning with high accuracy over a wide range of temperatures to be operated.
Furthermore, according to the present invention, the number of man-hours for parameter adjustment, which has been conventionally performed manually, can be greatly reduced.
Therefore, in the apparatus and system to which the present invention is applied, the performance and reliability are stably maintained high in various operating environments without significantly increasing the cost.

It is a figure which shows the 1st Embodiment of this invention. It is a figure which shows the structure of the measurement system which obtains the parameter used for the 1st Embodiment of this invention. It is an operation | movement flowchart of the 1st Embodiment of this invention. It is a figure explaining the operation | movement of the 1st Embodiment of this invention. It is a figure which shows the criterion of the optimal parameter used for the 1st Embodiment of this invention.

It is a figure which shows the parameter stored in a control table. It is a figure which shows the 2nd Embodiment of this invention. It is a figure which shows the structure of the measurement system which obtains the parameter used for embodiment of this invention. It is a figure which shows the parameter which should be programmed to the digital potentiometer with a temperature sensor. It is a figure (1) figure showing the composition provided with two or more temperature sensors. It is a figure (2) figure showing the composition provided with two or more temperature sensors. It is a figure which shows the structural example of the radar apparatus to which FM-CW system was applied.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First Embodiment]
FIG. 1 is a diagram showing a first embodiment of the present invention.
In FIG. 1, the same reference numerals as those shown in FIG. 12 are given to elements common to the above-described conventional example, and the description thereof is omitted here.

The difference in configuration between this embodiment and the conventional example shown in FIG. 12 is as follows.
(1) The antenna module 10M is provided instead of the antenna module 60M, and the antenna module 10M is provided with the housing or the printed circuit board 10 instead of the housing or the printed circuit board 60.

(2) In the case or the printed circuit board 10, the following elements are arranged in addition to the directional coupler 53, the transmission antenna 54T, the reception antenna 54R, the delay circuit 57, and the combiner 58 shown in FIG.
(2-1) Variable phase shifter 11 and variable attenuator 12 instead of phase shifter 55 and attenuator 56 shown in FIG.

(2-2) Control unit 13 having an output port connected to control inputs of these variable phase shifter 11 and variable attenuator 12, and having a non-volatile control table to be described later
(2-3) A temperature sensor 14 having an output connected to the input port of the control unit 13 and closely temperature-coupled to the variable phase shifter 11 and the variable attenuator 12

FIG. 2 is a diagram showing the configuration of a measurement system that obtains parameters used in the first embodiment of the present invention.
In FIG. 2, a radio wave absorber 21 is laid on all the inner walls of the thermostatic chamber 20, and the antenna module 10 </ b> M shown in FIG. 1 is disposed inside the thermostatic chamber 20. The following elements are arranged outside the thermostat 20.

(1) The network analyzer 22 connected to the directional coupler 53 and the combiner 58 in place of the transmitter 52 and the receiver 59 shown in FIG.
(2) A personal computer 23 connected to the control port of the network analyzer 22 and the control port of the control unit 13 described above.

FIG. 3 is an operation flowchart of the first embodiment of the present invention.
The operation of the first embodiment of the present invention will be described below with reference to FIGS.
The antenna module 10M disposed inside the thermostat 20 is an antenna module 10M that is incorporated in the radar apparatus as shown in FIG.

  The network analyzer 22 functions as the transmission unit 52 and the reception unit 59 shown in FIG. 1 under the initiative of the personal computer 23, and gives a transmission wave to the transmission antenna 54T via the directional coupler 53. Since the transmission wave radiated from the transmission antenna 54T is absorbed by the radio wave absorber 21 described above, the main component of the radio signal obtained at the feeding end of the reception antenna 54R is described above with the transmission antenna 54T. Component (hereinafter referred to as “feed-through wave”) transmitted through a path formed through a space (including a space where the printed circuit board 10 is interposed).

Each time the personal computer 23 is newly given the temperature in the thermostatic chamber 20 (here, it is assumed that the temperature is set in steps of 1 degree) and the temperature becomes a steady state, The following processing is performed.
(1) The variable phase shifter 11 and the variable attenuator 12 are connected to the variable phase shifter 11 and the variable attenuator 12 via the control unit 13 as shown in FIG. All of the combinations of the attenuation amount Loss are sequentially set (step S1 in FIG. 3).

(1-1) The following processing is performed for each combination of the phase shift amount φ and the attenuation amount Loss set in this way.
(1-1-1) By changing the frequency of the transmission wave stepwise through the network analyzer 22 over the entire possible band of the transmission wave frequency, the reception antenna 54R passes through the combiner 58. Level L of the composite wave (field-through wave and transmission wave input via the parallel path) obtained in this manner, and the width of the frequency band (hereinafter, Simply referred to as "bandwidth") W (step S2 in FIG. 3).

(1-1-2) By storing a record including the corresponding phase shift amount φ and attenuation amount Loss in the storage area on the main memory of the personal computer 23 in addition to the obtained level L and bandwidth W, The table 23t shown in FIG. 4 is sequentially generated (step S3 in FIG. 3).
(1-2) Of the records in the table 23t generated in this manner, “transmission wave (indicated by a solid line in FIG. 5) is included in the bandwidth W, as shown in FIG. ) Is included (hereinafter referred to as “specific record”) that includes “all of the frequency bands W0 that can be taken by” and has the lowest level L (step S4 in FIG. 3).

(1-3) The amount of phase shift included in the specific record as shown in FIG. 6 in the storage area of the nonvolatile memory built in the control unit 13 (hereinafter referred to as “control table 13t”). A combination of φ and the attenuation amount Loss and the corresponding temperature t is written (step S5 in FIG. 3).

When the contents of the control table 13t are determined by the above processing, the antenna module 10M is mounted on the radar device as shown in FIG.
In the radar apparatus shown in FIG. 1, the temperature sensor 14 is closely temperature-coupled to the variable phase shifter 11 and the variable attenuator 12, so that the temperature sensor 14 includes the variable phase shifter 11 and the variable attenuator 12. Always measure the temperature of the above path.

The control unit 13 sets the attenuation amount Loss and the phase shift amount φ stored in the control table 13t in the variable phase shifter 11 and the variable attenuator 12 in accordance with the path temperature thus measured.
That is, the component of the transmission wave transmitted from the transmission antenna 54T to the reception antenna 54R through the above-described path is changed from the directional coupler 14 to the variable phase shifter 11 and the variable attenuator even if the temperature varies widely. 12 and the transmission wave component transmitted through the parallel path to the synthesizer 58 via the delay circuit 57 and cancelled with high accuracy.

Therefore, according to the present embodiment, it is possible to reduce much of the man-hours conventionally required for adjusting the transfer characteristics of the parallel paths, and the ranging accuracy of the radar apparatus is stable over a wide temperature range, and Highly maintained.
In the present embodiment, the parameter stored in the control table 13t does not have to be the deviation of the transfer characteristic of the parallel path itself, and the variable phase shifter 11 and the attenuator are used to compress (cancel) the deviation. 12. Any signal may be used as long as it can be used to obtain a control signal to be supplied to the delay circuit 57.

  Further, according to the present invention, even when the variable phase shifter 11 and the variable attenuator 12 have a hysteresis with respect to the temperature, the table 23t and the control table 13t described above are separate tables corresponding to the increase and decrease of the temperature. Can be applied as well.

Furthermore, this embodiment is configured as follows when the response time with respect to the temperature change of the phase shift amount φ of the variable phase shifter 11 and the attenuation amount Loss of the variable attenuator 12 is so slow that it cannot be ignored. A similar effect can be achieved.
(1) Measure and record the temperature response characteristics of the variable phase shifter 11 and variable attenuator 12.
(2) The above-described table 23t is generated based on the steady values of the phase shift amount φ and the attenuation amount Loss obtained with respect to the temperature change.
(3) The phase shift amount φ and the attenuation amount Loss obtained from the control table 13t are corrected in order of time series by referring to the response characteristics according to the time elapsed from the most recent time when the temperature has changed. Applied.

[Second Embodiment]
FIG. 7 is a diagram showing a second embodiment of the present invention.
In the figure, the difference from the first embodiment shown in FIG. 1 is that a temperature potentiometer 31 is provided in place of the temperature sensor 14 and the control unit 13 (including the control table 13t). is there.
FIG. 8 is a diagram showing a configuration of a measurement system for obtaining parameters used in the embodiment of the present invention.

  In the figure, the difference from the measurement system shown in FIG. 2 is that a digital potentiometer 31 with a temperature sensor is provided in place of the temperature sensor 14 and the control unit 13 (including the control table 13t).

The operation of the second embodiment of the present invention will be described below with reference to FIGS.
The digital potentiometer 31 with temperature sensor has two ports and has the following functions.

  The temperature is tightly coupled to the parallel path described above, and the resistance value of each port is switched to a value corresponding to the temperature of the parallel path and output. Further, the resistance values of these ports are set according to a command given by the personal computer 23, and are programmed as values corresponding to the temperature at that time.

  Accordingly, in the digital potentiometer 31 with temperature sensor, after the resistance values at all temperatures are programmed by the personal computer 23, the potential of each port is a value suitable for the temperature of the parallel path (proportional to the resistance value of each port). Therefore, the amount of phase shift of the variable phase shifter 11 and the amount of attenuation of the variable attenuator 12 can be varied.

The personal computer 23 performs the following processing every time when the temperature in the thermostatic chamber 20 becomes a steady state and the temperature is newly given.
All combinations of the phase shift amount φ and the attenuation amount Loss that can be set in the variable phase shifter 11 and the variable attenuator 12 are obtained by varying the combination of the resistance values of the two ports of the digital potentiometer 31 with the temperature sensor. Are set sequentially.

(1) Based on the same procedure as in the first embodiment described above, the table 23t shown in FIG. 4 is generated, and the “specific record” is specified among the records in the table 23t.
(2) The resistance values corresponding to the phase shift amount φ and the attenuation amount Loss included in this specific record are programmed into the two ports as shown in FIG. 9 as two resistance values corresponding to the temperature at this time. To do.

  When two resistance values corresponding to all the temperatures are programmed in the digital potentiometer 31 with temperature sensor by the above processing, the antenna module 10M is mounted on the radar device as shown in FIG.

  In the radar apparatus shown in FIG. 7, the temperature sensor built in the potentiometer 31 with the temperature sensor constantly measures the temperature of the parallel path including the variable phase shifter 11 and the variable attenuator 12.

  Since the resistance values of the two ports of the potentiometer 31 with the temperature sensor are pre-programmed values corresponding to the temperature t thus measured, the phase shift amount φ of the variable phase shifter 11 and the attenuator The attenuation amount Loss of 12 is maintained at an optimum value at the temperature t of the parallel path.

  That is, the component of the transmission wave transmitted from the transmission antenna 54T to the reception antenna 54R through the above-described path is synthesized from the directional coupler 14 via the variable phase shifter 11, the variable attenuator 12, and the delay circuit 57. It is suppressed (cancelled) with high accuracy by the component of the transmission wave transmitted through the parallel path to the device 58.

  Therefore, in the present embodiment, the phase shift amount φ of the variable phase shifter 11 and the attenuation amount Loss of the variable attenuator 12 are obtained by the temperature sensor potentiometer 31 that replaces the temperature sensor 14 and the control unit 13 shown in FIG. The discrete analog quantity corresponding to the temperature of the parallel path is maintained at the optimum value, and the radar ranging accuracy is stably and highly maintained over a wide temperature range as in the first embodiment described above. Is done.

  In the present embodiment, the phase shift amount φ of the variable phase shifter 11 and the attenuation amount Loss of the variable attenuator 12 are set as resistance values of the potentiometer 31 with a temperature sensor that is optimal at the temperature of the parallel path. Yes.

However, the phase shift amount φ and the attenuation amount Loss may be set as values corresponding to the following analog amounts, for example.
(1) Capacitance, inductance, voltage value, current value
(2) Amplitude, level, phase shift, frequency of analog AC signal
(3) Pulse signal frequency, duty ratio, pulse width, rise time (fall time)

  Such an analog quantity may be given by any circuit or element other than the potentiometer 31 with a temperature sensor.

  In addition, each embodiment mentioned above is comprised on the assumption that the variable phase shifter 11 and the variable attenuator 12 are temperature-coupled closely to the temperature sensor 14 (potentiometer 31 with a temperature sensor).

  However, according to the present invention, the variable phase shifter 11, the variable attenuator 12, and the temperature sensor 14 are caused by restrictions on component arrangement on the housing or the printed circuit board 10 or thermal coupling with other components and other members. When the (potentiometer 31 with temperature sensor) has to operate at different temperatures, for example, as shown in FIGS. 10 and 11, the temperature sensor is individually connected to the variable phase shifter 11 and the variable attenuator 12. A temperature sensor that is thermally coupled closely may be provided, and a combination of temperatures measured by these temperature sensors may be referred to instead of the temperature in the first embodiment or the second embodiment.

  Further, in each of the above-described embodiments, the transfer characteristic of the parallel path that is variable according to the temperature is such that the maintenance of the isolation between the transmission antenna 54T and the reception antenna 54R is achieved with a desired accuracy. For example, as shown by the dotted lines in FIGS. 1, 2, 7, 8, 10, and 11, the delay amount is adjusted in accordance with the phase shift amount of the variable phase shifter 11 and the attenuation amount of the variable attenuator 12. The delay time of the circuit 57 may be included, or any combination of these phase shift amounts, attenuation amounts, and delay times may be used.

  Further, in each of the above-described embodiments, the setting of the temperature in the thermostat 20 and the time when the temperature reaches a steady value are both performed by the personal computer 23 leading and switching the temperature, And you may identify autonomously by monitoring the temperature given from the temperature sensor 14 via the control part 13. FIG.

  Further, in each of the above-described embodiments, the “frequency band W0 that the transmission wave can take” indicated by a broken line in FIG. 5 may be an occupied band that is determined according to the modulation method applied to the transmission wave. In addition, by setting to a band that covers the whole of a wide range of different frequency bands, adaptation to legal restrictions in the region where the electronic device to which the present invention is applied operates or standardization of the configuration may be realized. .

  Furthermore, the present invention is not limited to a radar to which the above-described FM-CW scheme is applied, as long as it is required to ensure high isolation between the transmission antenna 54T and the reception antenna 54R. The present invention is applicable to both applied radar and various electronic devices other than radar.

  Moreover, in each embodiment mentioned above, the range and value of the temperature set by the thermostat 20 may be set to what value.

  Furthermore, the present invention can be applied to ensure high isolation between the transmission system and the reception system even when the transmission antenna 54T and the reception antenna 54R are configured as a single antenna. is there.

  Further, in each of the above-described embodiments, the phase shift amount φ of the variable phase shifter 11 and the attenuation amount Loss of the variable attenuator 12 are set between the transmission antenna 54T and the reception antenna 54R by the measurement system shown in FIGS. The change according to the temperature of the characteristic is set to a value that can be absorbed together.

  However, if changes in the characteristics of both the transmitting antenna 54T and the receiving antenna 54R according to the temperature can be ignored, the “separate module” in which the transmitting antenna 54T and the receiving antenna 54R can be attached to and detached from the antenna module 10M described above. The measurement system shown in FIGS. 2 and 8 may be preliminarily provided with a common module corresponding to this separate module.

  Further, the present invention is not limited to the above-described embodiments, and various configurations of the embodiments are possible within the scope of the present invention, and any improvements may be made to all or some of the components.

  Hereinafter, the inventions disclosed in the present application will be organized and listed in a format according to the descriptions in the “Claims” and “Means for Solving the Problems” columns.

[Claim 1] In a system that is connected to a transmission system and a reception system and has a path that directly transmits a part of a transmission wave from the transmission system to the reception system, the system is arranged in parallel with the path and the transmission wave A side-by-side path having a transfer characteristic that partially suppresses a level input to the receiving system;
Temperature measuring means for measuring the temperature of the parallel paths;
Since the attenuation of the path in the frequency band of the transmission wave is equal to or greater than a predetermined threshold, a parameter including an amount for which the transfer characteristic is to be compensated is previously associated with a temperature at which the parallel path can operate. Stored storage means;
And a control means for compensating for a deviation in the transfer characteristic using a parameter stored in the storage means in association with the temperature measured by the temperature measurement means.
In the feedthrough compensation device having such a configuration, the parallel path is connected to the transmission system and the reception system, and has a path that directly transmits a part of the transmission wave from the transmission system to the reception system. The transmission characteristic is provided in parallel with a path and suppresses a level at which a part of the transmission wave is input to the reception system. The temperature measuring means measures the temperature of the parallel path. The storage means corresponds to the temperature at which the parallel path can operate because the amount of attenuation of the path is equal to or greater than a predetermined threshold in the frequency band of the transmission wave, and the parameter including the amount that the transfer characteristic is to be compensated for. And stored in advance. The control means compensates for the deviation of the transfer characteristic using a parameter stored in the storage means in association with the temperature measured by the temperature measurement means.
That is, even if the temperature of the parallel path changes, the deviation of the transfer characteristics of the parallel path is compensated by using a parameter stored in advance in the storage unit corresponding to this temperature.
Therefore, the band of the reception wave received by the reception system is not limited, and the component of the transmission wave transmitted from the transmission system to the reception system via the path is parallel from the transmission system via the parallel path. By being combined with the transmitted wave component transmitted in this manner, it is stably and accurately suppressed over a wide range of temperatures.

[Claim 2] In the feedthrough compensation apparatus according to claim 1,
The temperature measuring means includes
Measure the temperature of the parallel path as an analog quantity,
The storage means
Storing the parameter as an analog quantity;
The control means includes
A feedthrough compensation device, wherein the deviation of the transfer characteristic is compensated in an analog region.
In the feedthrough compensation device having such a configuration, in the feedthrough compensation device according to claim 1, the temperature measurement unit measures the temperature of the parallel paths as an analog quantity. The storage means stores the parameter as an analog quantity. The control means compensates for the deviation of the transfer characteristic in an analog region.
That is, the deviation of the transfer characteristics of the parallel paths caused by the temperature change is compensated by performing the same processing as that of the first aspect of the invention in the analog domain.
Therefore, the band of the reception wave received by the reception system is not limited, and the component of the transmission wave transmitted from the transmission system to the reception system via the path is parallel from the transmission system via the parallel path. By being combined with the transmitted wave component transmitted in this manner, it is stably and accurately suppressed over a wide range of temperatures.

[Claim 3] In the feedthrough compensation apparatus according to claim 1 or 2,
The temperature measuring means includes
Individually measuring the temperature of a plurality of elements arranged on the parallel path and realizing variable for each of a plurality of physical quantities indicating the transfer characteristics;
The storage means
Storing the parameters as combinations of individual physical quantities and temperatures of the plurality of elements, or deviations and temperatures of individual physical quantities of the plurality of elements;
The control means includes
The feedthrough compensation device, wherein a deviation of the transfer characteristic is compensated using a parameter stored in the storage unit in association with the temperature measured for each of the plurality of elements by the temperature measurement unit.
In the feedthrough compensation device having such a configuration, in the feedthrough compensation device according to claim 1 or 2, the temperature measurement unit is arranged on the parallel path and has a plurality of transfer characteristics. The temperature of a plurality of elements that can be varied for each physical quantity is individually measured. The storage means stores the parameters as combinations of individual physical quantities and temperatures of the plurality of elements, or deviations and temperatures of individual physical quantities of the plurality of elements. The control unit compensates for the deviation of the transfer characteristic using a parameter stored in the storage unit in association with the temperature measured for each of the plurality of elements by the temperature measurement unit.
That is, the deviation in the transfer characteristics of the parallel paths can be accurately compensated even when the temperature of the parallel paths is not uniform.
Therefore, the electronic device to which the present invention is applied is greatly restricted in terms of restrictions related to component arrangement, mounting, and thermal structure, and the operating environmental conditions are expanded.

[Claim 4] A transmission antenna that radiates a transmission wave output from the transmission system;
A receiving antenna that delivers incoming waves to the receiving system;
A side-by-side path having a transmission characteristic that suppresses a level at which a part of the transmission wave is input to the reception system, and is provided in parallel to a path that directly transmits a part of the transmission wave from the transmission system to the reception system When,
Temperature measuring means for measuring the temperature of the parallel paths;
Since the attenuation of the path in the frequency band of the transmission wave is equal to or greater than a predetermined threshold, a parameter including an amount for which the transfer characteristic is to be compensated is associated with a temperature at which the juxtaposed paths can operate in advance. Stored storage means;
And a control means for compensating for the deviation of the transfer characteristic using a parameter stored in the storage means in association with the temperature measured by the temperature measurement means. .
In the feedthrough compensation antenna having such a configuration, the transmission antenna radiates a transmission wave output from the transmission system. The receiving antenna delivers the incoming received wave to the receiving system. A parallel path is provided in parallel with a path that directly transmits a part of the transmission wave from the transmission system to the reception system, and a transfer characteristic that suppresses a level at which a part of the transmission wave is input to the reception system. Have The temperature measuring means measures the temperature of the parallel path. The storage means corresponds to the temperature at which the parallel path can operate because the amount of attenuation of the path is equal to or greater than a predetermined threshold in the frequency band of the transmission wave, and the parameter including the amount that the transfer characteristic is to be compensated for. And stored in advance. The control means compensates for the deviation of the transfer characteristic using a parameter stored in the storage means in association with the temperature measured by the temperature measurement means.
That is, even if the temperature of the parallel path changes, the deviation of the transfer characteristics of the parallel path is compensated by using a parameter stored in advance in the storage unit corresponding to this temperature.
Accordingly, the band of the received wave received via the receiving antenna is not limited, and the component of the transmitted wave transmitted from the transmitting antenna to the receiving antenna via the above path is transmitted from the transmitting antenna via the parallel path. By being combined with the components of the transmitted wave transmitted in parallel, the signal is stably and accurately suppressed over a wide range of temperatures.

[Claim 5] In the feedthrough compensation antenna according to claim 4,
The temperature measuring means includes
Measure the temperature of the parallel path as an analog quantity,
The storage means
Storing the parameter as an analog quantity;
The control means includes
A feedthrough compensation antenna, wherein the deviation of the transfer characteristic is compensated in an analog region.
In the feedthrough compensation antenna having such a configuration, in the feedthrough compensation antenna according to claim 4, the temperature measurement unit measures the temperature of the parallel paths as an analog quantity. The storage means stores the parameter as an analog quantity. The control means compensates for the deviation of the transfer characteristic in an analog region.
That is, the deviation in the transfer characteristics of the parallel paths caused by the temperature change is compensated by performing the same processing as that of the invention according to claim 4 in the analog domain.
Therefore, the band of the reception wave received by the reception system is not limited, and the component of the transmission wave transmitted from the transmission system to the reception system via the path is parallel from the transmission system via the parallel path. By being combined with the transmitted wave component transmitted in this manner, it is stably and accurately suppressed over a wide range of temperatures.

[Claim 6] In the feedthrough compensation antenna according to claim 4 or 5,
The temperature measuring means includes
Individually measuring the temperature of a plurality of elements arranged on the parallel path and realizing variable for each of a plurality of physical quantities indicating the transfer characteristics;
The storage means
Storing the parameters as combinations of individual physical quantities and temperatures of the plurality of elements, or deviations and temperatures of individual physical quantities of the plurality of elements;
The control means includes
A feedthrough compensation type antenna that compensates for a deviation in the transfer characteristic by using a parameter stored in the storage unit in association with the temperature measured for each of the plurality of elements by the temperature measurement unit. .
In the feedthrough compensation antenna having such a configuration, in the feedthrough compensation antenna according to claim 4 or 5, the temperature measurement unit is disposed on the parallel path and exhibits the transfer characteristic. The temperature of a plurality of elements that realizes variability for each of a plurality of physical quantities is individually measured. The storage means stores the parameters as combinations of individual physical quantities and temperatures of the plurality of elements, or deviations and temperatures of individual physical quantities of the plurality of elements. The control unit compensates for the deviation of the transfer characteristic using a parameter stored in the storage unit in association with the temperature measured for each of the plurality of elements by the temperature measurement unit.
That is, the deviation in the transfer characteristics of the parallel paths can be accurately compensated even when the temperature of the parallel paths is not uniform.
Therefore, in the electronic device to which the present invention is applied, the restrictions on the component arrangement, mounting, and thermal structure are greatly eliminated, and the operating environmental conditions are expanded.

[Claim 7] In the feedthrough compensation antenna according to any one of claims 4 to 6,
The transmitting antenna and the receiving antenna are
A feedthrough compensation type antenna characterized by being configured as an antenna for both transmission and reception.
In the feedthrough compensation antenna having such a configuration, in the feedthrough compensation antenna according to any one of claims 4 to 6, the transmission antenna and the reception antenna are configured as antennas for transmission and reception. The
That is, even when the transmission antenna and the reception antenna are shared antennas, the isolation between the transmission system and the reception system is stably maintained high over a wide range of temperatures.
Therefore, the electronic device to which the present invention is applied can achieve high performance under desired environmental conditions without being restricted by the configuration of the antenna system.

[Claim 8] The feedthrough compensation device according to any one of claims 1 to 3,
A transmission system and a reception system connected to the feedthrough compensation device;
The receiving system is
A radar apparatus that performs ranging or positioning of a target that is a source of the reception wave based on a correlation between a transmission wave transmitted by the transmission system and a reception wave that has arrived at the reception system.
In the radar apparatus having such a configuration, the transmission system and the reception system are connected to the feedthrough compensation apparatus according to any one of claims 1 to 3. The reception system performs ranging or positioning of a target that is a source of the reception wave based on a correlation between the transmission wave transmitted by the transmission system and the reception wave that has arrived at the reception system.
That is, the band of the received wave received by the receiving system is not limited, and the component of the transmitted wave transmitted from the transmitting system to the receiving system is stably and accurately suppressed over a wide range of temperatures.
Therefore, the radar apparatus according to the present invention can stably perform ranging and positioning with high accuracy over a wide range of temperatures to be operated.

[Claim 9] The feedthrough compensation antenna according to any one of claims 4 to 7, and
A transmission system and a reception system connected to the feedthrough compensation antenna;
The receiving system is
A radar apparatus that performs ranging or positioning of a target that is a source of the reception wave based on a correlation between a transmission wave transmitted by the transmission system and a reception wave that has arrived at the reception system.
In the radar apparatus having such a configuration, the transmission system and the reception system are connected to the feedthrough compensation antenna according to any one of claims 4 to 7. The reception system performs ranging or positioning of a target that is a source of the reception wave based on a correlation between the transmission wave transmitted by the transmission system and the reception wave that has arrived at the reception system.
That is, the band of the received wave received by the receiving system is not limited, and the component of the transmitted wave transmitted from the transmitting system to the receiving system is stably and accurately suppressed over a wide range of temperatures.
Therefore, the radar apparatus according to the present invention can stably perform ranging and positioning with high accuracy over a wide range of temperatures to be operated.

[Claim 10] The temperature at which the feedthrough compensator according to any one of claims 1 to 3 operates is set in stages.
A method for measuring a feedthrough compensation value, comprising: measuring a parameter to be stored in advance in a storage means provided in the feedthrough compensation device.
In the feedthrough compensation value measuring method having such a configuration, the temperature at which the feedthrough compensation device according to any one of claims 1 to 3 operates is set in a stepwise manner, and the feedthrough compensation device is provided. The parameter to be stored in advance in the storage means is measured.
In other words, in an electronic apparatus in which the feedthrough compensation device according to any one of claims 1 to 3 is mounted, in order to maintain high isolation between the transmission system and the reception system over a wide range of temperatures. The necessary parameters are pre-measured and incorporated using the feedthrough compensation device.
Therefore, it is possible to greatly reduce the number of man-hours for parameter adjustment, which has been conventionally performed manually, and to improve performance and reliability at low cost.

[Claim 11] A temperature at which the feedthrough compensation antenna according to any one of claims 4 to 7 operates is set in a stepwise manner.
A method for measuring a feedthrough compensation value, characterized in that a parameter to be stored in advance in a storage means provided in the feedthrough compensation antenna is measured.
In the feedthrough compensation value measuring method having such a configuration, the temperature at which the feedthrough compensation antenna according to any one of claims 4 to 7 operates is set in stages, and the feedthrough compensation antenna The parameters to be stored in advance in the storage means provided in the are measured.
That is, in an electronic device in which the feedthrough compensation antenna according to any one of claims 4 to 7 is mounted, isolation between the transmission system and the reception system is maintained high over a wide range of temperatures. The parameters required for this are pre-measured and incorporated using the feedthrough compensation device.
Therefore, it is possible to greatly reduce the number of man-hours for parameter adjustment, which has been conventionally performed manually, and to improve performance and reliability at low cost.

[Claim 12] The temperature at which the radar apparatus according to claim 8 or 9 is operated is set stepwise,
A feedthrough compensation value measuring method, wherein a parameter to be stored in advance in a storage means provided in the radar apparatus is measured.
In the feedthrough compensation value measuring method having such a configuration, the temperature at which the radar apparatus according to claim 8 or 9 is operated is set in a stepwise manner and should be stored in advance in a storage unit provided in the radar apparatus. Parameters are measured.
That is, in the radar device according to claim 8 or 9, the parameters necessary for maintaining high isolation between the transmission system and the reception system over a wide range of temperatures are set in advance using the radar device. Measured and incorporated.
Therefore, it is possible to significantly reduce the number of adjustment steps that have been conventionally performed manually for the parameter adjustment, and it is possible to improve performance and reliability at a low cost.

10, 60 Housing or printed circuit board 10M Antenna module 11 Variable phase shifter 12 Variable attenuator 13 Control unit 13t Control table 14 Temperature sensor 20 Thermostatic chamber 21 Radio wave absorber 22 Network analyzer 23 Personal computer 23t Table 31 Potentiometer 51 with temperature sensor Ranging processor 52 Transmitter 53 Directional coupler 54T Transmit antenna 54R Receive antenna 55 Phase shifter 56 Attenuator 57 Delay circuit 58 Synthesizer 59 Receiver

Claims (5)

In a system connected to a transmission system and a reception system and having a path for directly transmitting a part of a transmission wave from the transmission system to the reception system, the transmission wave is arranged in parallel with the path, and a part of the transmission wave is received by the reception system. A side-by-side path having a transfer characteristic for suppressing the level input to the system;
Temperature measuring means for measuring the temperature of the parallel paths;
Since the attenuation of the path in the frequency band of the transmission wave is equal to or greater than a predetermined threshold, a parameter including an amount for which the transfer characteristic is to be compensated is previously associated with a temperature at which the parallel path can operate. Stored storage means;
And a control means for compensating for a deviation in the transfer characteristic using a parameter stored in the storage means in association with the temperature measured by the temperature measurement means. A transmission antenna that radiates transmission waves output from the transmission system;
A receiving antenna that delivers incoming waves to the receiving system;
A side-by-side path having a transmission characteristic that suppresses a level at which a part of the transmission wave is input to the reception system, and is provided in parallel to a path that directly transmits a part of the transmission wave from the transmission system to the reception system When,
Temperature measuring means for measuring the temperature of the parallel paths;
Since the attenuation of the path in the frequency band of the transmission wave is equal to or greater than a predetermined threshold, a parameter including an amount for which the transfer characteristic is to be compensated is previously associated with a temperature at which the parallel path can operate. Stored storage means;
And a control means for compensating for the deviation of the transfer characteristic using a parameter stored in the storage means in association with the temperature measured by the temperature measurement means. . A feedthrough compensator according to claim 1;
A transmission system and a reception system connected to the feedthrough compensation device;
The receiving system is
A radar apparatus that performs ranging or positioning of a target that is a source of the reception wave based on a correlation between a transmission wave transmitted by the transmission system and a reception wave that has arrived at the reception system. A feedthrough compensated antenna according to claim 4;
A transmission system and a reception system connected to the feedthrough compensation antenna;
The receiving system is
A radar apparatus that performs ranging or positioning of a target that is a source of the reception wave based on a correlation between a transmission wave transmitted by the transmission system and a reception wave that has arrived at the reception system. The temperature at which the feedthrough compensation device according to claim 1 operates is set in stages,
A method for measuring a feedthrough compensation value, comprising: measuring a parameter to be stored in advance in a storage means provided in the feedthrough compensation device.