JPH0645272Y2 - Pass-through SWR measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is to connect between the output side of a transmitter such as a transceiver and the input side of an antenna to establish a matching state between the transmitter and the antenna. The present invention relates to a pass-through type SWR measuring device for measuring.

(Prior Art) Conventional SWR for measuring the matching state between transmitter and antenna
As measuring devices, SWR automatic measuring devices that require a single power source to automatically measure SWR or single SWR manual measuring devices that manually measure SWR are known. Each was independent, with a single function as a manual.

(Problems to be Solved by the Invention) In the conventional SWR measuring device described above, the automatic measurement and the manual measurement are independent of each other, and therefore, the matching state between the transmitter and the antenna is measured. In this case, depending on whether the measurement is performed at the output side of the transmitter or at the input side of the antenna, automatic measurement or manual measurement is selected due to problems with power supply. There is an inconvenient problem that it is necessary to prepare and use properly, and further there is a problem that it is uneconomical and lacks in practicality.

The present invention has been devised in view of the above-mentioned conventional problems, and a single SWR measuring device is provided with an automatic measuring function and a manual measuring function so that automatic and manual use can be performed as needed. It is an object of the present invention to provide a passage type SWR measuring device configured as described above.

(Means for Solving the Problem) The gist of the present invention is, as shown in the figure, a terminal for connecting the output side of the transmitter, a terminal for connecting the input side of the antenna, SWR measurement sensor unit having an output terminal and an output terminal for reflected wave power, a potentiometer with two uniaxial motors, and a control signal for driving the motor forward and backward in accordance with the output value of the traveling wave power A forward / reverse circuit having two comparators including one potentiometer connected to the output terminal of the traveling wave power, and an SWR measurement connected via the other potentiometer connected to the output terminal of the reflected wave power. Meter for
And a manual operation knob for moving both potentiometers in conjunction with each other.

(Operation) Therefore, switch the power supply of the forward / reverse rotation circuit including the motor to the switch
By opening and closing with, both automatic and manual measurement can be performed, and thus the above-mentioned problems can be achieved.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a passage type SWR measuring device, and 1 is a sensor part of the SWR measuring device, which is a schematic view of a known directional coupler. The sensor unit 1 has a terminal T ₁ that connects the output side of the transmitter TX, a terminal T ₂ that connects the input side of the antenna ANT, an output terminal F of the directional coupler for detecting the traveling wave power, and a reflected wave. Output terminal R of directional coupler for power detection
And are provided respectively. The output terminal F has a resistor R ₁
Is connected to one of the potentiometers VR ₁ described below via a meter circuit switcher S, and is also connected to the other potentiometer VR ₂ described below via a meter circuit switch S.

The output terminal R is connected to the other potentiometer VR ₂ through the adjusting resistor VR ₃ and the switch S, and the potentiometer VR ₂ can be manually operated in conjunction with the potentiometer VR _1. A knob 2 is provided. These potentiometers VR ₂ and VR ₁ have 1 axis 2
It is a continuous type and is operated in conjunction with the motor described below.

_On the output side of potentiometer VR ₂ , SWR measurement meter 3
Are connected.

Further, a resistor R ₂ having a resistance value equivalent to that of the above-mentioned meter 3 is connected in parallel to the output side of the potentiometer VR ₁ and two comparators 4 and 5 are connected. Then, one comparator 4 has a reference voltage VH, for example, 0.165V.
The comparator 5 is configured to output a low signal when a higher voltage is applied, and the other comparator 5 outputs a high signal when a voltage smaller than the reference voltage VL, for example, 0.155V is applied. Is configured.

Reference numeral 6 is an inverting buffer connected to the output side of the comparator 4, 7 is a buffer connected to the output side of the comparator 5, and transistors Tr ₁ and Tr ₂ are connected to the output sides of the buffers 6 and 7, respectively. the motor M is connected via a forward-reverse circuit 8 consisting Tr _3, Tr _4. Reference numeral 9 denotes a transmission detection comparator whose input side is connected to the output terminal F. The comparator 9 is configured to output a low signal when a reference voltage VS, for example, a voltage higher than 0.1 V is applied. ing. Reference numeral 10 is a buffer connected to the output side of the comparator 9. V is a power supply connection terminal for 12V, for example, and this terminal V is connected to the power supply circuit 11 of the motor M via the switch SW. The output side of the power supply circuit 11 is connected to the forward / reverse rotation circuit 8, and the power supply circuit 11 is configured to be turned on by the output signal of the comparator 9 via the buffer 10. In this way, the power supply circuit 11 is operated when a predetermined traveling wave power is detected. Otherwise, the forward / reverse rotation circuit 8 is not in the equilibrium state and the motor M is kept driven. This is because the inconvenience of becoming

Therefore, in the above configuration, first, the SW that does not supply power
R Manual measurement will be described.

First, connect the output side of the transmitter TX to the terminal T ₁ and the output side of the antenna ANT to the terminal T ₂ , respectively, and connect the meter circuit switch S
From the terminal R side to the F side. In this state, the transmitter
The TX is set to the transmitting state, and then the manual operation knob 2 is operated to adjust the pointer of the meter 3 to the full scale. Next, the switch S is returned from the terminal F side to the R side.
In this state, the motor M is driven based on the above-mentioned circuit operation according to the magnitude of the output signal by the traveling wave power, the 1-axis dual potentiometers VR ₁ , VR ₂ move, and the pointer of the meter 3 outputs by the reflected wave power. The value corresponding to the value is moved, and by observing the position of the pointer of this meter, the SWR
Is measured.

Next, the automatic measurement that requires power supply will be described. First, the switch SW is closed and a predetermined voltage is applied to the power supply circuit 11 from the outside.

Then, similarly to the above manual measurement, the output side terminal of the transmitter is connected to the terminal T ₁ of the SWR measuring device and the input side of the antenna is connected to T ₂ , respectively, and the meter circuit switch S is connected to the terminal R side as shown in the figure. Defeat it. Under this condition, SWR can be automatically measured. First, by putting the transmitter in the transmitting state, the output from the output terminal F is applied to the comparator 9 on the one hand, where the output value from the output terminal F is greater than the reference voltage VS value only. A low signal is output from 9 and this is the buffer 10
Is applied to the power supply circuit 11 via
Is switched from OFF to ON and a voltage is applied to the forward / reverse rotation circuit 8.

On the other hand, it is applied to the comparators 4 and 5 via the potentiometer VR ₁ respectively, and in the comparator 4, only when the applied signal value is larger than the reference voltage VH value with the voltage at which the meter 3 becomes full scale as the reference voltage. A lower signal is output, which becomes a high signal via the inversion buffer 6 and is applied to the forward / reverse rotation circuit 8 to switch the transistor Tr ₁ of the same circuit 8 from OFF to ON. However, a signal that is larger than the reference voltage VL value and is low from the comparator 5 is output and applied to the other forward / reverse rotation circuit 8 via the buffer 7, and the transistor Tr _{4 of the} same circuit 8 is output.
Is switched from OFF to ON and the motor M is driven in one direction. By this drive, the potentiometer VR ₁ ,
VR ₂ is changed together, the applied signal value becomes equal to the reference voltage, the motor M is stopped, and the pointer of the meter 3 is moved in one direction. Is measured.

When the output signal value from the sensor unit 1 is smaller than the reference voltage VL value, one comparator 4 outputs a high signal, which is applied to the forward / reverse circuit 8 via the inversion buffer 6. As a result, the transistor Tr ₂ is switched from OFF to ON, and a high signal is output from the comparator 5 as a matter of course, which is applied to the forward / reverse rotation circuit 8 via the buffer 7 and the transistor Tr ₃ is switched from OFF to ON.
It is switched to ON and the motor M is driven in the opposite direction from the previous time, and this drive drives potentiometers VR ₁ and VR with 1 axis and 2 stations.
₂ is changed together, the pointer of the meter 3 is moved in the opposite direction to the previous time, and by observing the pointer of the meter 3, SW
R measurement is performed. Although not shown in this embodiment, the traveling wave power value and the reflected wave power value can be separately displayed on the meter by a switching operation.

Further, in this embodiment, the SWR measuring meter 3 is switched between the terminal F side and the R side by the meter circuit switch S, so that the traveling wave power and the reflected power can be measured by one meter. However, the dedicated meters may be connected to the terminals F and R, respectively, and in this case, of course, the automatic measurement function can be obtained.

(Effect of Device) As described above, according to this device, the single SWR measuring device has the two functions of the automatic measurement and the manual measurement. Since it is large and has both automatic and manual measurement functions, it can be used manually or automatically depending on the SWR measurement near the output side of the transmitter and the SWR measurement near the input side of the antenna. Is.

[Brief description of drawings]

The drawing is a block diagram showing a passage type SWR measuring device of the present invention. 1 ... SWR measurement sensor, 2 ... manual operation knob,
3 …… SWR measurement meter, 8 …… forward / reverse circuit, S …… meter circuit selector, VR ₁ , VR ₂ …… 1 axis 2 stations potentiometer with motor.

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. An SWR measuring sensor unit having a terminal for connecting an output side of a transmitter, a terminal for connecting an input side of an antenna, an output terminal for traveling wave power, and an output terminal for reflected wave power; Two comparators including a potentiometer having two shafts and one potentiometer connected to the output terminal of the traveling wave power for outputting a control signal for driving the motor forward and backward according to the output value of the traveling wave power. A forward / reverse circuit having, an SWR measurement meter connected via the other potentiometer connected to the output terminal of the reflected wave power, and a manual operation knob for moving both potentiometers in conjunction with each other. Passage type characterized by
SWR measuring device.