JP5936935B2 - Wireless device - Google Patents

Description

  The present invention relates to a technique for confirming a path abnormality in a high-frequency line in a wireless device.

  In order to establish signal transmission / reception in the high-frequency line, it is necessary to check the normality of the route, including confirmation of the fitting of the coaxial connector and confirmation that the coaxial cable is not broken.

  In addition, due to the occurrence of problems such as poor fitting of the coaxial connector or disconnection in the cable, the line impedance of the high-frequency line deviates from a certain value, and signal reflection occurs, resulting in the operation of the device that sent the signal to the line. Inconvenience may occur.

  Therefore, in order to avoid the above inconvenience, it is necessary to check the normality of the route, including confirmation of fitting of the coaxial connector and confirmation that the coaxial cable is free of defects such as disconnection.

  For example, [Patent Document 1] below discloses the following technique for confirming the connection state between a wireless device and an antenna. That is, a technique in which a coupling unit is provided between a radio device and an antenna, a test signal is transmitted from the transmission unit of the radio device, the test signal is turned back by the coupler, and applied to the reception unit of the radio device It is. If there is no problem in the connection state between the wireless device and the antenna, the receiving unit receives the test signal. If there is a problem, the receiving unit fails to receive the signal.

  In addition, although not intended for the connector fitting confirmation itself, the following techniques can be applied to the connector fitting confirmation.

  That is, in [Patent Document 2] below, only the DC resistance value is lowered by utilizing the fact that the resistance value of the diode connected between the inner and outer conductors of the coaxial connector changes depending on the bias current value. A technique is disclosed that automatically terminates and terminates termination by controlling the bias current of a diode when a signal line is in a connected state or unconnected state by detaching a mating connector.

  Although the technique of the above-mentioned patent document 2 is originally intended to appropriately perform termination processing, it is possible to confirm the fitting of the connector by detecting the resistance value of the diode.

  By the way, the current main communication system employs an FDD (Frequency Division Duplex) system in which a transmission frequency and a reception frequency are different. For example, both GSM (Global System for Mobile Communications) and UMTS (Universal Mobile Telecommunication Systems), which is an extension of GSM (registered trademark), adopt the FDD method.

  Therefore, in the FDD transmission / reception apparatus, the frequency of the signal transmitted by its own transmission unit is different from the frequency that can be detected by its own reception unit, that is, the reception frequency. Even if the signal transmitted by the unit is received, it cannot be detected.

JP 2009-272968 A (November 19, 2009) JP-A-6-268468 (September 22, 1994)

  However, the conventional configuration has the following problems.

  First, the technique disclosed in Patent Document 1 cannot be applied to an FDD transmission / reception apparatus employed by the current main communication system.

  The technique of Patent Document 1 confirms the connection state between the radio apparatus and the antenna by turning back the test signal transmitted by the transmission section using a coupler and providing the signal to the reception section of the radio apparatus.

  However, in the FDD transmission / reception apparatus, even if the test signal transmitted by itself is received, the test signal cannot be detected because the transmission frequency and the reception frequency are different.

  The technique disclosed in Patent Document 2 can be applied to the coaxial connector fitting determination, but cannot check the normality of the route other than the high-frequency line fitting confirmation including, for example, cutting of the coaxial cable.

  Moreover, although the technique currently disclosed by patent document 2 can be applied to the fitting determination of a connector as above-mentioned, the fitting determination is inadequate in the following points.

  In other words, even if the connector is not properly fitted, as long as the jack and plug of the connector are in contact with each other, the direct current resistance value does not change significantly. As a result, the voltage applied to the diode also changes greatly. Does not occur.

  Therefore, the technique disclosed in Patent Document 2 is insufficient for appropriately performing the connector fitting confirmation.

  The present invention has been made in view of the above-described problems, and its main purpose is to confirm the fitting of the coaxial connector and the problem such as disconnection of the coaxial cable with respect to the high-frequency line in the radio apparatus adopting the FDD method. It is an object of the present invention to provide a wireless device capable of easily confirming the normality of a route including confirmation that there is no communication.

In order to solve the above-described problems, a wireless device according to the present invention includes a main board including a transmission / reception circuit, and a sub-board that is connected to the main board via a coaxial cable and transmits / receives a signal to / from the transmission / reception circuit. A wireless device comprising:
(1) The sub-board is
(A) From the connector connected to the coaxial cable, one end is connected to a high-frequency line extending on the opposite side of the coaxial cable, and is closed based on a direct current fed from the main board via the coaxial cable, A high frequency switch that opens when no direct current is supplied, and
(B) a terminal resistor connected to the other end of the high-frequency switch and grounded,
(2) The main board is
(C) the transceiver circuit;
(D) It is characterized by including a direct current power source for supplying direct current to the high frequency switch of the sub-board via the coaxial cable.

  According to the above configuration, if there is no problem in the DC connection between the main board and the sub board, the DC current supplied by the DC power supply of the main board is the terminal resistance of one end of the sub board that is grounded. Close the high-frequency switch connected to the other end.

  Here, if there is no path abnormality of the high-frequency line between the main board and the sub board, the load impedance of the transmission circuit of the main board can be managed by the termination resistance of the sub board.

  Therefore, when there is no problem in DC connection between the main board and the sub board and there is no path abnormality as a high-frequency line, when the transmission circuit outputs a transmission wave, the current flowing through the transmission / reception circuit is , The current is within the range assumed in advance.

  As a result, it is possible to confirm the abnormality of the high-frequency line using only the current flowing in the transmission / reception circuit at the time of transmission, that is, without the reception operation of the reception circuit. Normality confirmation can be easily performed.

  Further, according to the above configuration, as described above, it is possible to easily confirm an abnormality in DC connection between the main board including the transmission / reception circuit and the sub board.

  Further, in a wireless device, it is common to supply a direct current to a substrate including a transmission / reception circuit. Therefore, the present invention is substantially based on an existing wireless device, and one end is grounded and the other end is This can be realized by adding only a terminating resistor connected to the high frequency line of the sub-board via a high-frequency switch to the sub-board. That is, the present invention can be realized extremely easily and at low cost using an existing wireless device.

  In the output device according to the present invention, the transmission / reception circuit preferably includes a power amplifier.

  According to the above configuration, in the wireless device, the path abnormality of the high-frequency line between the main board and the sub board including the transmission / reception circuit can be determined using the current flowing through the power amplifier when the transmission wave is output.

  In a transmission / reception circuit of a wireless device, a current flowing through a power amplifier is extremely sensitive to changes in load impedance.

  This is because the power amplifier is first a component that handles a larger amount of power than the other components of the transmission / reception circuit, and secondly, it is directly connected to the high-frequency line.

  To explain the first reason in more detail, the power amplifier amplifies the transmission signal to an output necessary for transmitting it from the antenna and flying it far away. Flows more than. Therefore, since the current flowing through the power amplifier is large, the amount of change in the current flowing through the power amplifier due to the change in the load impedance is also large.

  Further, the second reason will be described in more detail. The power amplifier exists in the final stage of transmission except for the Tx / Rx switch. Therefore, for example, when the coaxial cable is not sufficiently fitted, the influence is directly connected to the load impedance for the power amplifier. In other words, since the power amplifier is directly connected to an element that fluctuates the load, it is sensitive to a change in load impedance.

  For the above two reasons, in the transmission / reception circuit of the wireless device, the current flowing through the power amplifier in the transmission / reception circuit is more sensitive to changes in load impedance than the current flowing through other circuit components in the transmission / reception circuit. Is expensive.

  Therefore, by using the current flowing through the power amplifier at the time of transmission wave output, it is possible to realize a highly accurate determination of the path abnormality of the high-frequency line between the main board and the sub board including the transmission / reception circuit.

  In addition, since power amplifiers used for transmission are common in transmission / reception circuits of wireless devices, high-frequency line path anomalies can be realized with high accuracy without adding power amplifiers as new circuit components. And the cost can be reduced.

In the output device according to the present invention,
(3) a current value acquisition unit that measures a current flowing through the transmission / reception circuit when the transmission / reception circuit outputs a transmission wave;
(4) When the high-frequency switch is closed and there is no path abnormality in the high-frequency line between the main board and the sub-board, the range of the specified current flowing through the transmission / reception circuit when the transmission wave is output is stored. A storage unit;
(5) It is preferable that the apparatus further includes a determination unit that determines whether or not the current measured by the current value acquisition unit is within the range of the specified current.

  According to the above configuration, first, the current value acquisition unit measures a current flowing through the transmission / reception circuit when the transmission / reception circuit outputs a transmission wave, and then the determination unit is stored in the storage unit. Using the specified current range, it is determined whether or not the current measured by the current value acquisition unit is within the specified current range.

  Here, as described above, the current measured by the current value acquisition unit when there is a path abnormality including a poor fitting of the coaxial connector and a disconnection of the coaxial cable for the high-frequency line between the main board and the sub board. Is out of the range of the specified current.

  Therefore, the determination unit determines whether the current measured by the current value acquisition unit is within the range of the specified current using the range of the specified current stored in the storage unit. The normality of the path of the high-frequency line between the main board and the sub board can be determined.

  That is, the wireless device according to the present invention includes a main board including a transmission / reception circuit and a sub board that transmits / receives signals to / from the transmission / reception circuit via the coaxial cable without using any external device. The normality of a path | route can be determined about the high frequency track | line between.

  In addition, in a wireless device, it is common to measure the current flowing through a transmission / reception circuit when a transmission wave is output. Therefore, the above configuration substantially adds the determination unit and the storage unit to the main board. It can be realized only by doing. That is, the above configuration can be realized very easily and at low cost using an existing wireless device.

  Furthermore, the user can easily confirm the abnormality of the route of the high-frequency line by referring to the determination result of the determination unit.

  In the output device according to the present invention, when the power amplifier outputs a transmission wave, a current value acquisition unit that measures a current flowing through the power amplifier, and the high-frequency switch are closed, and the main board and the auxiliary circuit are closed. When there is no path abnormality in the high-frequency line between the circuit board and the substrate, the storage unit storing the range of the specified current flowing through the power amplifier when the transmission wave is output, and the current measured by the current value acquisition unit are the specified current. It is preferable to further include a determination unit that determines whether or not the range is in the range.

  According to the above configuration, the determination unit utilizes the property of the power amplifier that is extremely sensitive to changes in load impedance, and the current measured by the current value acquisition unit is stored in the storage unit. It can be determined with high accuracy whether or not the current is within the specified current range.

  Therefore, the wireless device according to the present invention provides a path for a high-frequency line between a main board including a transmission / reception circuit and a sub-board that transmits and receives signals to and from the transmission / reception circuit via a coaxial cable. Normality can be determined with high accuracy.

  Further, the user can easily confirm the abnormality of the route of the high-frequency line by referring to a highly accurate determination result using the power amplifier.

  A radio apparatus according to the present invention is a radio apparatus including a main board including a transmission / reception circuit and a sub-board connected to the main board via a coaxial cable and transmitting / receiving signals to / from the transmission / reception circuit. One end of the board is connected to a high-frequency line extending from the connector connected to the coaxial cable to the opposite side of the coaxial cable, and the board is closed based on a direct current fed from the main board via the coaxial cable. A high-frequency switch that opens when a direct current is not supplied and a termination resistor that is connected to the other end of the high-frequency switch and is grounded. The main board is connected to the sub-board via the transmission / reception circuit and the coaxial cable. And a direct current power source for supplying direct current to the high frequency switch.

  Thereby, there exists an effect that the path | route abnormality of the high frequency track | line in the radio | wireless apparatus which employ | adopts FDD system can be determined.

It is a block diagram which shows the outline | summary of the radio | wireless apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows the functional structure of the control part of the said radio | wireless apparatus. It is a flowchart of the process in the radio | wireless apparatus which concerns on this invention. It is a block diagram which shows the outline | summary of the radio | wireless apparatus examined in advance when developing the radio | wireless apparatus which concerns on this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is a block diagram illustrating an outline of a hardware configuration of a wireless device 1 according to an embodiment of the present invention, FIG. 2 is a block diagram illustrating a functional configuration of a control unit 210 of the wireless device 1, and FIG. 4 is a flowchart of processing in the device 1.

  FIG. 4 is a block diagram showing an outline of the wireless device examined in advance when the wireless device 1 is developed.

(1) Configuration of Radio Device As shown in FIG. 1, the radio device 1 includes a main board 20 including an RF (Radio Frequency) circuit 230 as a transmission / reception circuit that performs FDD transmission / reception, and is coaxial with the main board 20. An antenna power supply board 40 (sub board) connected via the cable 30 and an antenna unit 50 connected to the antenna power supply board 40 are included.

  The antenna unit 50 includes an antenna body 520 and a spring contact 510 for connecting to the spring 460 of the antenna power supply substrate 40.

  The antenna power supply substrate 40 includes a connector 410 for connecting to the coaxial cable 30, a choke coil 420, a DC cut capacitor 430, a radio frequency (hereinafter abbreviated as “RF”) switch 440, and a termination resistor 441. And a spring 460 for connection with the spring contact 510.

  A DC cut capacitor 430 is connected to the high frequency line formed between the spring 460 and the connector 410, and one end of the RF switch 440 is connected between the DC cut capacitor 430 and the spring 460. .

  The other end of the RF switch 440 is grounded via a termination resistor 441.

  One end of the choke coil 420 is connected between the DC cut capacitor 430 and the connector 410.

  The choke coil 420 is arranged so that the opening and closing of the RF switch 440 is controlled based on the direct current passing through the choke coil 420. When the direct current flowing through the choke coil 420 is supplied to the RF switch 440, The RF switch 440 is closed.

  The RF switch 440 is, for example, a MEMS (Micro Electro Mechanical Systems) switch.

  The main board 20 includes a control unit 210, a storage unit 220, the RF circuit 230, an RF inspection connector 240, a DC cut capacitor 250, a choke coil 261, a DC power supply 260, and the coaxial cable 30. And a connector 270 for connection.

  Between the connector 270 and the RF circuit 230, an RF inspection connector 240 having one end is connected.

  A DC power supply 260 is connected between the other end of the RF inspection connector 240 and the connector 270 via a choke coil 261.

  A DC cut capacitor 250 is connected between the other end of the choke coil 261 that is not one end connected to the DC power supply 260 and one end that is not the ground point of the RF inspection connector 240.

  The RF circuit 230 includes a power amplifier (hereinafter abbreviated as “PA”) 231, a reception (Rx) circuit 232, and a Tx / Rx switch 233 used for transmission. The PA 231 and the reception (Rx) circuit 232 are connected to the Tx / Rx switch 233 in parallel, and the Tx / Rx switch 233 is connected to the RF inspection connector 240.

  Here, if there is no path abnormality in the high-frequency line between the main board 20 and the antenna power supply board 40 connected to the main board 20 via the coaxial cable 30, if the RF switch 440 is closed, the PA 231 The load impedance can be managed by the termination resistor 441.

  When the load impedance of the PA 231 can be managed by the termination resistor 441, the current flowing through the PA 231 when the transmission wave is output is a current that can be theoretically assumed in advance by the circuit designer, that is, a specified current.

  The storage unit 220 stores the specified current, and the control unit 210 measures the current that actually flows through the PA 231 when the transmission wave is output, and uses the specified current stored in the storage unit 220 to perform the measurement. It is determined whether or not the acquired current is a current assumed in advance.

  In addition, since the current flowing through the PA 231 at the time of transmission wave output is affected by at least the types of the connectors 270 and 410, the coaxial cable 30, and the PA 231, the specified current used for the determination is a specified current within a certain range. There may be.

  The certainty of the determination can be adjusted by setting the width of the range.

  Control unit 210 is further functionally connected to input unit 2, output unit 3, PA 231, and DC power supply 260.

  The control unit 210 receives the determination start instruction from the user via the input unit 2 and notifies the user of the determination result via the output unit 3.

  In this embodiment, the input unit 2 is a personal computer, and the output unit 3 is a screen of the personal computer.

  Control unit 210 instructs PA 231 and DC power supply 260 to start and stop transmission wave output and start and stop DC current feeding, respectively.

  The PA 231 executes start and stop of transmission wave output based on the above instruction from the control unit 210. Similarly, the DC power supply 260 supplies DC current based on the above instruction from the control unit 210. Execute start and stop.

  FIG. 2 is a block diagram illustrating a functional configuration of the control unit 210 of the wireless device 1.

  Control unit 210 includes a DC power supply management unit 211, a transmission wave output management unit 212, a current value acquisition unit 213, and a determination unit 214.

  Details of the functions of the above-described units included in the control unit 210 will be described later.

  As described above, the RF switch 440 of the antenna power supply board 40 is supplied with a direct current from the DC power supply 260 of the main board 20 if there is no problem in the DC connection between the main board 20 and the antenna power supply board 40. ,close up.

  Here, if there is no path abnormality of the high-frequency line between the main board 20 and the antenna power supply board 40, the load impedance of the PA 231 of the main board 20 can be managed by the termination resistor 441 of the antenna power supply board 40.

  Therefore, when there is no problem in DC connection between the main board 20 and the antenna power supply board 40 and there is no path abnormality as a high-frequency line, the current flowing through the PA 231 when the PA 231 outputs a transmission wave is: The current is in a range that is assumed in advance.

  The storage unit 220 stores the specified current of the PA 231 when the transmission wave is output when the RF switch 440 is closed and there is no path abnormality of the high-frequency line.

  Further, the control unit 210 determines whether or not the current flowing through the PA 231 at the time of transmission wave output is within an assumed range, using the specified current stored in the storage unit 220.

  Therefore, it is possible to check the abnormality of the high-frequency line using only the current flowing through the PA 231 during transmission, that is, without the reception operation of the transmission / reception circuit 230. In the FDD wireless device 1, the normal path of the high-frequency line It is possible to easily check the sex.

  In addition, as described above, it is possible to easily confirm the abnormality of the direct connection between the main board 20 including the transmission / reception circuit 230 and the antenna power supply circuit 40.

  By the way, in a wireless device, it is common to have a configuration for instructing a transmission / reception circuit to output a transmission wave and measuring a current flowing through the transmission / reception circuit at the time of transmission. It is common.

  Therefore, the wireless device 1 can be realized substantially by simply adding the RF switch 440 and the termination resistor 441 to the antenna power supply board based on the existing wireless device. That is, the wireless device 1 can be realized extremely easily and at low cost using an existing wireless device.

(2) Operation of Wireless Device Next, the operation of the wireless device 1 having the above configuration will be described. FIG. 3 is a flowchart showing the operation of the wireless device 1.

  When the control unit 210 receives a route normality confirmation instruction from the user via the input unit 2, first, as step 1 (hereinafter abbreviated as S 1), the DC power supply management unit 211 of the control unit 210 The DC power supply 260 is instructed to supply DC current.

  The DC power supply 260 starts to supply DC current based on the instruction (S2).

  Next, the transmission wave output management unit 212 of the control unit 210 instructs the PA 231 of the RF circuit 230 to output a transmission wave (S3).

  The PA 231 starts outputting the transmission wave based on the above instruction (S4).

  The current value acquisition unit 213 of the control unit 210 measures the current flowing through the PA 231 when the transmission wave is output (S5), and notifies the determination unit 214 of the acquired current value.

  When there is no problem with the DC connection between the main board 20 and the antenna power supply board 40 connected to the main board 20 via the coaxial cable 30, the DC current from the DC power supply 260 is The RF switch 440 is closed.

  When the RF switch 440 is closed and there is no path abnormality in the high-frequency line between the main board 20 and the antenna power supply board 40 connected to the main board 20 via the coaxial cable 30, the load impedance of the PA 231 Can be managed by the terminating resistor 441 of the antenna power supply substrate 40.

  On the other hand, when there is a problem with the DC connection between the main board 20 and the antenna power supply board 40 connected to the main board 20 via the coaxial cable 30, the RF switch 440 remains off.

  Therefore, when there is a problem with the DC connection, the load impedance of the PA 231 cannot be managed by the termination resistor 441 of the antenna power supply substrate 40, and the value of the current flowing through the PA 231 when the transmission wave is output is in a previously assumed range. Deviate from.

  In addition, although there is no problem with the DC connection, when a high-frequency line path abnormality occurs, the load impedance of the PA 231 cannot be managed by the termination resistor 441 in the same manner as described above. The value of the current flowing through the PA 231 deviates from a previously assumed range.

  For example, as long as the jack and the plug of the connector are in contact with each other, the direct current is connected to the main board 20 and the antenna feeding board 40 connected to the main board 20 via the coaxial cable 30 even if the fitting is poor. Can flow between. However, in the case of poor fitting, the value of the current flowing through the PA 231 when the transmission wave is output is out of the previously assumed range.

  That is, when there is no problem in DC connection between the main board 20 and the antenna power supply board 40 connected to the main board 20 via the coaxial cable 30, and there is no path abnormality as a high-frequency line. Only when the transmission wave is output, the value of the current flowing through the PA 231 is within a previously assumed range.

  Therefore, the main board 20 and the main board 20 are connected to each other via the coaxial cable 30 by determining whether or not the value of the current flowing through the PA 231 when the transmission wave is output is within a previously assumed range. The normality of the DC connection and the normality of the path as the high-frequency line can be confirmed with the antenna power supply substrate 40 that is being operated.

  Whether the determination unit 214 of the control unit 210 uses the value of the load current of the PA 231 stored in the storage unit 220 and the current value notified from the current acquisition unit 213 falls within a previously assumed range. It is determined whether or not (S6).

  When the current value notified from the current acquisition unit 213 is within the range assumed in advance (Yes in S6), the determination unit 214 determines “no path abnormality” (S7).

  When the current value notified from the current acquisition unit 213 is not within the range assumed in advance (No in S6), the determination unit 214 determines that “path abnormality is present” (S8).

  Thereafter, the control unit 210 instructs the DC power supply 260 to stop supplying power, and instructs the PA 231 to stop outputting the transmission wave (S9). Based on the instruction, the DC power supply 260 stops supplying power, and the PA 231 The transmission wave output is stopped (S10).

  The control unit 210 notifies the user of the determination result via the output unit 3 (S11).

(3) Reference Example FIG. 4 is a block diagram showing an outline of a reference wireless device 5 examined in advance when developing a wireless device according to the present invention.

  First, the configuration of the reference wireless device 5 will be described.

  As shown in FIG. 4, the wireless device 5 includes a main board 60 including an RF circuit 630 that performs FDD transmission / reception, an antenna feed board 80 connected to the main board 60 via a coaxial cable 70, and an antenna feed board 80. And an antenna unit 90 connected to the.

  The antenna unit 90 includes an antenna body 920 and a spring contact 910 for connecting to the spring 860 of the antenna power supply substrate 80.

  The antenna power supply board 80 includes a connector 810 for connecting to the coaxial cable 70, a choke coil 820, and a spring 860 for connecting to the spring contact 910.

  One end of the choke coil 820 is connected between the spring 860 and the connector 810, and the other end is grounded.

  The main board 60 includes a control unit 610, a storage unit 620, an RF circuit 630, an RF inspection connector 640, a DC cut capacitor 650, a choke coil 661, a resistor 662, a DC power source 660, and a coaxial cable. 70 includes a connector 670 for connection to the PC 70, and a general purpose input / output (GPIO) 680.

  An RF inspection connector 640 having one end is connected between the connector 670 and the RF circuit 630, and a DC cut capacitor is connected between the other end of the RF inspection connector 640 and the connector 670. 650 is connected.

  One end of the choke coil 661 is connected between the DC cut capacitor 650 and the connector 670.

  One end of a resistor 662 and a general-purpose input / output 680 are connected in parallel to the other end of the choke coil 661, and the other end of the resistor 662 is connected to a DC power source 660.

  The RF circuit 630 includes a PA 631 used for transmission, a reception (Rx) circuit 632, and a Tx / Rx switch 633. The PA 631 and the reception (Rx) circuit 632 are connected to the Tx / Rx switch 633 in parallel, and the Tx / Rx switch 633 is connected to the RF inspection connector 640.

  Here, when there is no problem in the DC connection between the main board 60 and the antenna power supply board 80 connected to the main board 60 via the coaxial cable 70, one end of the DC current supplied from the DC power supply 660 is grounded. The voltage is divided by the choke coil 820.

  Therefore, when there is no problem in the DC connection, the DC voltage detected by the general-purpose input / output is a voltage that can be assumed in advance, that is, a specified voltage.

  The storage unit 620 stores the specified voltage, and the control unit 610 uses the specified voltage stored in the storage unit 620 to actually use the general-purpose input / output 680 while the DC power supply 660 supplies power. It is determined whether or not the detected DC voltage matches the specified voltage.

  Note that the controller 610 instructs the DC power supply 660 to start supplying DC current before the determination, and the DC power supply 660 starts supplying DC current based on the instruction.

  The control unit 610 performs the direct current power supply start instruction to the direct current power source 660 and the subsequent determination based on the connection confirmation start instruction from the user acquired through the input unit 6, and the determination result is obtained. The user is notified through the output unit 7.

  According to the above configuration, the DC connection between the main board 60 and the antenna power supply board 80 connected to the main board 60 via the coaxial cable 70 can be confirmed without using the RF circuit 630.

  That is, whether or not one of the two boards includes a transmission / reception circuit when the two boards are connected via the coaxial cable 70 using a DC power source, a general-purpose input / output, and a choke coil. Regardless, the DC connection between the two substrates can be determined.

  However, the control unit 660 only determines whether or not the DC voltage division is generated as expected, that is, the main board 60 and the antenna power supply connected to the main board 60 via the coaxial cable 70. It is only possible to determine the normality of the DC connection with the substrate 80.

  Therefore, the normality of the path of the high-frequency line between the main board 60 and the antenna power supply board 80 connected to the main board 60 via the coaxial cable 70 cannot be confirmed.

  On the other hand, the wireless device 1 has only normal DC connection between the main board 20 including the transmission / reception circuit 230 and the antenna power supply board 40 connected to the main board 20 via the coaxial cable 30. In addition, the normality of the route of the high-frequency line can also be determined.

  So far, the present invention has been described on the assumption that the antenna power supply substrate 40 is connected to the main substrate 20 including the RF circuit 230 via the coaxial cable 30. However, in the present invention, the connection to the main board 20 including the transmission / reception circuit via the coaxial cable 30 is not limited to the antenna power supply board 40.

  In the present invention, the sub-board connected to the main board including the transmission / reception circuit via the coaxial cable is connected to the high-frequency line extending from the connector connected to the coaxial cable to the opposite side of the coaxial cable. Any substrate including a termination resistor connected via a high-frequency switch and having the other end grounded may be used.

  According to the present invention, if the sub-board includes an RF switch that is fed from the main board and is closed by a direct current, and a termination resistor having one end connected to the RF switch and the other end grounded, By using the current flowing in the transmission circuit of the main board at the time of output, it is possible to determine the path abnormality of the high-frequency line between the sub board and the main board.

  Therefore, the RF switch 440 having one end connected to the terminating resistor 441 and the other end connected between the connector 410 and the spring 460 is also limited to the connection between the connector 410 and the spring 460 of the antenna power supply substrate 40. I don't mean.

  For wireless device 1, control unit 210 determines the current flowing through PA 231 when the transmission wave is output.

  However, in the present invention, as the current used to determine the path abnormality of the high-frequency line of the wireless device, the current flowing through the RF circuit 230 when the transmission wave is output, that is, the current flowing through the transmission / reception circuit when the transmission wave is output may be used.

  This is because the transmission / reception circuit changes the load impedance due to a path abnormality in the high-frequency line of the wireless device, and the change in the load impedance can be determined by the current flowing through the transmission / reception circuit when the transmission wave is output.

  However, when determining the change in the load impedance, it is particularly desirable to use the PA 231 of the RF circuit 230 as the transmission / reception circuit, particularly from the following points.

  That is, the PA 231 is first a component that handles a larger amount of power than the other components of the RF circuit 230, and secondly, it is directly connected to the high-frequency line.

  The first reason will be described in more detail. The PA 231 amplifies a transmission signal to an output necessary for transmitting the signal from the antenna unit 50 and flying it far away. Flows more than elements. Therefore, the amount of change in the current flowing through the PA 231 due to the change in the load impedance is large because the current flowing through the PA 231 is large.

  Explaining the second reason in more detail, the PA 231 exists in the final stage of transmission except for the Tx / Rx switch 233. Therefore, for example, when the connector 270 or 410 is not sufficiently fitted to the coaxial cable 30, the influence is directly connected to the load impedance for the PA 231. That is, since PA 231 is directly connected to a load fluctuation element, it is sensitive to a change in load impedance.

  For the two reasons described above, in the RF circuit 230 of the wireless device 1, the current flowing through the PA 231 is more sensitive to changes in load impedance than the current flowing through other circuit components in the RF circuit 230.

  Therefore, it is desirable to use the PA 231 of the RF circuit 230 when determining the change in the load impedance.

  Furthermore, although the output unit 3 is a screen of a personal computer outside the wireless device 1, the output unit 3 may be a light emitting element. In this case, the user is notified of the presence or absence of a path abnormality by lighting the light emitting element. Also good. Further, the output unit 3 may be a speaker. In that case, the user may be notified of the presence or absence of a path abnormality by voice.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  The present invention can be used for all wireless devices including at least a high-frequency line.

1 Radio equipment 20 Main board 30 Coaxial cable 40 Antenna power supply board (sub board)
410 Connector 213 Current value acquisition unit 214 Judgment unit 220 Storage unit 230 RF circuit (transmission / reception circuit)
231 PA (Power Amplifier)
260 DC power supply 270 connector 440 RF switch (high frequency switch)
441 Terminating resistor

Claims (2)

A main board including a transceiver circuit;
A wireless device that is connected to the main board via a coaxial cable and includes a sub-board that performs transmission and reception of signals and the transmission / reception circuit,
The sub-board is
One end of the connector connected to the coaxial cable is connected to a high-frequency line extending on the opposite side of the coaxial cable and is closed based on a direct current fed from the main board via the coaxial cable. A high-frequency switch that opens when it is not powered,
A terminal resistor connected to the other end of the high-frequency switch and grounded;
The main board is
The transceiver circuit;
A direct current power source for supplying direct current to the high frequency switch of the sub-board via the coaxial cable ;
A current value acquisition unit for measuring a current flowing in the transmission / reception circuit when the transmission / reception circuit outputs a transmission wave;
A storage unit storing a range of a specified current flowing in the transmission / reception circuit when a transmission wave is output when the high-frequency switch is closed and there is no path abnormality in the high-frequency line between the main board and the sub-board. ,
And a determination unit that determines whether or not the current measured by the current value acquisition unit is within the range of the specified current . A main board including a transceiver circuit;
A wireless device that is connected to the main board via a coaxial cable and includes a sub-board that performs transmission and reception of signals and the transmission / reception circuit,
The sub-board is
One end of the connector connected to the coaxial cable is connected to a high-frequency line extending on the opposite side of the coaxial cable and is closed based on a direct current fed from the main board via the coaxial cable. A high-frequency switch that opens when it is not powered,
Connected to the other end of the high-frequency switch,
With
The main board is
The transceiver circuit;
A DC power supply for supplying DC current to the high frequency switch of the sub-board via the coaxial cable;
With
The transmission and reception circuit is seen including a power amplifier,
When the power amplifier outputs a transmission wave, a current value acquisition unit that measures a current flowing through the power amplifier;
A storage unit that stores a range of a specified current that flows to the power amplifier when a transmission wave is output when there is no path abnormality in the high-frequency line between the main board and the sub-board with the high-frequency switch closed. ,
A determination unit that determines whether or not the current measured by the current value acquisition unit is within the range of the specified current;
A wireless device further comprising:

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