JP2003075488A - Network analyzer, measurement method by the same, and component-sorting apparatus having the network analyzer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform measurement to a device having a small number of ports by a multi-port network analyzer. SOLUTION: The network analyzer comprises a single signal source O, a signal distribution means PS for distributing a signal from the signal source into a plurality of portions for supply, output ports 1-4 for connecting each of a plurality of ports at a plurality of measurement targets X1 and X2, signal path-switching means S1-S4 for switching between a state where a signal that is distributed by a signal distribution means is inputted and the inputted signal is selected and supplied to one corresponding output port among output ports and a state where a characteristic signal obtained from the measurement targets via the output port is transmitted to terminators T1-T4, and reception means D1-D4 that are inclined between the signal path-switching means and the output port to receive a characteristic signal obtained from the measurement target.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network analyzer having four or more measurement ports, a measuring method using the network analyzer, and a component selection device having the network analyzer.

[0002]

2. Description of the Related Art Conventionally, as a multi-port network analyzer having four or more measurement ports, characteristic measurement is performed on a measurement target such as a device having four or more ports. The one configured as shown is known.

As shown in this figure, for example, 4
When measuring a 2-port device X with a 4-port network analyzer including one data sampler D1 to D4, only two of the four data samplers D1 to D4 (D1 and D2 in FIG. 7) are used for measurement. The remaining two data samplers D3 and D4 were unused. This corresponds to using the 4-port network analyzer as a 2-port network analyzer.

[0004]

By the way, the 4-port network analyzer is more expensive than the 2-port network analyzer. Therefore, the measurement efficiency is low when the device originally used for the 4-port device is used only for the measurement of one 2-port device. In addition, it is assumed that the four data samplers in this conventional 4-port network analyzer are divided into two sets, and the measurement of the 2-port device is performed in each set, and even if these two 2-port devices are simultaneously connected to the signal source. Since the impedance of the signal source and the impedance of the parallel connection circuit of these two devices are mismatched, accurate characteristic measurement cannot be performed.

However, on the user side, there is a need for a multi-port network analyzer capable of measuring the 4-port device, and it is simply shown in FIG.
A 4-port device cannot be measured only by preparing a 2-port network analyzer as shown in (4).

It is an object of the present invention to enable a multi-port net analyzer to efficiently perform a measurement on a device having a small number of ports such as a 2-port device, while measuring a device having four or more ports. Another object of the present invention is to provide a network analyzer capable of performing the above, a measuring method using the network analyzer, and a component selection device including the network analyzer.

[0007]

A network analyzer according to claim 1 of the present invention comprises a single signal source, and signal distribution means for distributing and supplying a signal from the signal source to a plurality of signals.
An output port capable of separately connecting a plurality of ports in a measurement target and a signal distributed by the signal distribution means are input, and the input signal is selected for a corresponding one of the output ports. Between the signal path switching means and the output port, the signal path switching means being switchable between a state in which the characteristic signal obtained from the measurement target is transmitted to the terminator through the output port And receiving means for receiving a characteristic signal obtained from the measurement target.

According to the configuration of claim 1 of the present invention, the signal obtained by distributing the signal from the single signal source by the signal distribution means is output to each of the one or more ports to be measured as output ports. Supply it to the measurement target in the connected state,
By measuring the characteristics obtained as a result, it is possible to increase the number that can be measured at the same time as compared to the conventional case where only one target with a small number of ports can be measured at a time, which improves measurement efficiency. Become. In addition, since a signal for characteristic measurement can be supplied to each measurement object via the signal distribution unit, mutual characteristic signals are less likely to affect each other, so that the characteristic measurement for each measurement object can be performed. It can be done accurately.

A network analyzer according to a second aspect of the present invention is the network analyzer according to the first aspect, wherein each signal distributed by the signal distribution means is applied to a plurality of measurement targets connected to the output port. A state in which the signal from the corresponding signal source is supplied to the selected one of a plurality of corresponding output ports through the corresponding signal path switching means, and the signal from the signal source is distributed by the signal distribution means. It is characterized in that the switching means is provided so as to be freely switched to the state of being supplied to each of the signal path switching means.

According to the configuration of claim 2 of the present invention, when the former state is set by the switching means, it becomes possible to simultaneously measure the characteristics of a plurality of measurement targets having a small number of ports, while the latter state is set. Then, it is possible to measure the characteristics of the measurement target with a large number of ports with each port connected to the output port. Therefore, when measuring the characteristics of a measurement target with a small number of ports and the characteristics of a measurement target with a large number of ports. It can be used properly depending on when the measurement is performed.

A network analyzer according to a third aspect of the present invention is the network analyzer according to the first or second aspect, wherein the signal path switching means is provided between the signal distribution means and the signal path switching means. It is characterized in that an insulator for suppressing the transmission of the reflected signal to the distribution means is interposed.

According to the third aspect of the present invention, the adverse effect that the reflected signal to the signal distribution means side is superimposed on the supply signal to the measurement object can be suppressed by the insulator.
In the characteristic measurement of a plurality of measurement objects, the characteristic measurement with higher accuracy can be performed.

The network analyzer according to claim 4 of the present invention is the network analyzer according to any one of claims 1 to 3, wherein the measurement target connected to the output port is a device having a balanced port, Means for converting a balanced port as an unbalanced port is interposed between the corresponding port and the output port.

According to the configuration of claim 4 of the present invention, even in a device having a plurality of balanced ports, an output port is provided through a means for converting a balanced port into an unbalanced port, for example, a 180 ° hybrid or a balun. By connecting to the output port, it is possible to convert to a measurement target that has the same number of unbalanced ports as the number of balanced ports and connect it to the output port, and it becomes possible to measure the characteristics of multiple devices at the same time. Can be improved.

According to a fifth aspect of the present invention, there is provided a parts selection device,
It is a component selection device provided with the network analyzer in any one of Claim 1 to 4, Comprising: The measurement port is provided with multiple measurement stations provided with the probe connected to the said output port, and contactable to the port of a measurement object. Sorting means configured to be switchable between a state in which the measurement target conveyed to the station is measured at the same time and a state in which only the measurement target in a specific measurement station is measured, and a component to be the measurement target is selected based on the measurement result. It is characterized by having.

According to the structure of claim 5 of the present invention, when parts are selected, when the objects to be selected as the parts to be measured have a small number of ports, a plurality of parts are simultaneously measured by a plurality of measuring stations. If you measure and have a large number of ports to be measured, you can enable the characteristic measurement for each port at a specific measurement station.In each case, you can measure the characteristics accurately and efficiently,
Based on the result, for example, good products and defective products can be favorably selected.

According to a sixth aspect of the present invention, there is provided a network analyzer measuring method, wherein each supply port of a signal distributing means for distributing and supplying a signal from a single signal source into a plurality of signals,
Select one of the plurality of ports to be measured between the output ports to which a plurality of ports in the subject to be measured can be separately connected, and supply the signal from the supply port to the selected port. With a signal path switching means and a receiving means for receiving a characteristic signal obtained from the measurement object by the supplied signal, and a plurality of ports of the measurement object are connected to the corresponding output ports. It is characterized in that the characteristics of a plurality of the measuring objects are simultaneously measured by connecting them.

According to the configuration of claim 6 of the present invention, a signal obtained by distributing a signal from a single signal source by the signal distribution means is connected to each output port of a plurality of measurement targets. By supplying to multiple measurement targets and measuring the resulting characteristics at the same time, compared to the conventional case where only one measurement target with a small number of ports could be measured at a time, the number of measurements that can be measured simultaneously Efficiency will be improved. Further, since the characteristic measurement signal is supplied to each measurement target through the signal distribution means, mutual characteristic signals are less likely to affect each other, so that the characteristic measurement for each measurement target is accurate. You can do it well.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention, and FIG. 1 is a circuit diagram showing a main part of a 4-port network analyzer for measuring two 2-port devices. FIG. 2 is a circuit diagram showing a main part of a 4-port network analyzer that measures one 4-port device.

FIG. 1 shows a main part according to the present invention in a multiport network analyzer for measuring the characteristics of a device such as a SAW filter.

As shown in FIG. 1, this multiport network analyzer includes output ports (connector sections) 1 to 4 of a 4-port network analyzer having four data samplers D1 to D4 as receiving means in addition to the reference sampler R. Is equipped with. A power splitter PS as a signal distribution means is connected to a single signal source O of this network analyzer. As a result, the signal from the signal source O is output from the output terminals A and B as two supply ports of the power splitter PS, respectively. Each of the output ports 1 to 4 is connected to a switch S1 to S4 as a signal path switching unit composed of a device such as a relay or a multiplexer, and one of two fixed terminals of each of the switches S1 to S4 is connected. Is a terminator T
1 to T4, and the other is connected to the output terminal A or the output terminal B of the power splitter PS.

Between the movable contacts of the switches S1 to S4 and the output ports 1, 2, 3 and 4, a direction for obtaining a reflection signal or a transmission signal obtained by measurement as a characteristic signal is provided. The sex couplers H1 to H4 are provided respectively. Each of the directional couplers H1 to H4 has a receiver R1 to R4.
Are connected to the data samplers D1 to D4 by the directional couplers H1 to H4 and the receivers R1 to R4.
4 are configured respectively. In addition, receivers R1 to R
The characteristic signal received in 4 will be used for signal analysis in the network analyzer main body (not shown).

Further, circulators C1 and C2 as an example of an insulator are connected between the switches S1 to S4 and the output terminals A and B of the power splitter PS,
A non-reflective terminator is connected to the third terminals of the circulators C1 and C2.

A switching means 10 is provided for switching between a state in which the output terminal B of the power splitter PS and the output ports 3 and 4 are connected and a state in which the output terminal B is disconnected and opened. Further, switching means 11 is provided for switching between a state where the fixed contact terminals of the switches S1 and S2 and the fixed contact terminals of the switches S3 and S4 are connected and a state where they are cut and opened. These switching means 1
For 0 and 11, for example, a jumper wire may be inserted / removed into / from the connection / disconnection portion so as to switch between a disconnection state and a connection state, and the switches S1 to S4.
Means for performing switching may be provided. These switching means 10 and 11 are indicated by switch symbols in the figure.

Regarding the measurement method using the 4-port network analyzer having the above-mentioned configuration, the characteristics of a measurement target having two ports are measured and the characteristics of a measurement target having four ports are measured respectively. Explained.

First, with reference to FIG. 1, description will be given of a case where the characteristic measurement of a measuring object having two ports is performed.

The switching means 10 is left open and the switching means 11 is connected. And
After performing normal calibration such as full 2-port correction in advance, connect each port of one measurement target X1 equipped with two ports to the corresponding output ports 1 and 2, and connect each port of the measurement target X2 of the same type. Are connected to the corresponding output ports 3 and 4. In this case, the switches S1 and S2 are set in advance so that the output port 1 and the signal source O side are connected and the output port 2 and the terminator T2 are connected, and the output port 3 and the signal source O side are connected. The switches S3 and S4 are set so that and are connected, and the output port 4 and the terminator T4 are connected.

Then, the signal from the signal source O is distributed so as to be output from the output terminals A and B via the power splitter PS, respectively. At this time, the signal from the output terminal A is supplied to the output port 1, and the reflected signal reflected by the measurement target X1 by the supply of the signal is received by the receiver R1 through the output port 1 and the directional coupler H1. On the other hand, the transmission signal transmitted through the measurement target X1 by the supplied signal and obtained through the output port 2 is received by the receiver R2 through the directional coupler H2. The same applies to the measurement target X2 in which the output ports 3 and 4 are connected to the respective ports. That is, the signal from the output terminal B is supplied to the output port 3, and the reflected signal obtained by reflecting the supplied signal on the measurement target X2 is received by the receiver R3 through the output port 3 and the directional coupler H3. On the other hand, the transmission signal transmitted through the measurement target X2 by the supplied signal and obtained through the output port 4 is received by the receiver R4 through the directional coupler H4.

Next, in the switch S1, the connection state between the output port 1 and the output terminal A is switched to the connection state between the output port 1 and the terminator T1, and in the switch S2,
The connection state between the output port 2 and the terminator T2 is switched to the connection state between the output port 2 and the output terminal A, and the switch S3
At, in the connection state between the output port 3 and the output terminal B,
The connection state between the output port 3 and the terminator T3 is switched, and the switch S4 switches the connection state between the output port 4 and the terminator T4 to the connection state between the output port 4 and the output terminal B. Then, in this state, the signal from the signal source O is output through the power splitter PS to its output terminals A and B.
Are supplied to the output ports 2 and 4, respectively. The reflected signal reflected by the measurement target due to the supply of the signal from the output terminal A is received by the receiver R2 through the output port 2 and the directional coupler H2. On the other hand, the transmission signal transmitted through the measurement target by the supplied signal and obtained through the output port 1 is received by the receiver R1 through the directional coupler H1. The same applies to a measurement target in which each port is connected to the output ports 3 and 4. That is, the output terminal B
The reflected signal reflected by the measurement target due to the supply of the signal from the receiver is received by the receiver R4 through the output port 4 and the directional coupler H4. On the other hand, the transmission signal transmitted through the measurement target by the supplied signal and obtained through the output port 3 is received by the receiver R3 through the directional coupler H3.

The measurement process of these measurement objects is completed by the above-mentioned two measurements, and based on the reception result, the network analyzer measures, for example, the amplitude characteristic and the phase characteristic of each measurement object.

The combination of the output ports 1 and 2 as one set and the output ports 3 and 4 as another set is arbitrary. For example, the output ports 1 and 3 as one set and the output ports 2 and 4 as a set. May be combined and measured as a different set.

With the above configuration, when measuring a 2-port device with a 4-port multi-port network analyzer, two 2-port devices can be measured at the same time, so that only one device can be measured at a time. Compared with, the processing capacity is improved to be doubled.

In this case, the signal output from the power splitter PS is transmitted to the measurement target side by the circulators C1 and C2 and the terminator connected thereto, but the reflected wave from the measurement target is the power splitter PS. Since energy is converted to heat by the terminator without being transmitted to the side, even if one of the measurement targets being measured at the same time is short-circuited, the other sample can be measured without its influence.

Next, with reference to FIG. 2, a process of measuring the characteristics of a 4-port device by the 4-port network analyzer will be described.

The switching means 10 is switched from the open state to the connected state, and the switching means 11 is switched from the connected state to the open state. Of the switches S1 to S4, first, in the switch S1, setting is made so that the output port 1 and the signal input side fixed terminal are connected, and the switches S2 and S4 are connected.
In S3 and S4, the output ports 2, 3 and 4 are set to be connected to the terminators T2, T3 and T4, respectively. Then, the output ports 1, 2, 3, and 4 are respectively connected to the corresponding ports of the measurement target X3 having four ports.

When a signal is output from the signal source O in this state, the signal is output from the output terminal A to each of the switches S1 to S4 without being distributed by the power splitter PS, and the output port 1 via the switch S1. Will be supplied only to. Measurement target X3 by the signal supplied from output terminal A
The reflected signal reflected by is received by the receiver R1 through the output port 1 and the directional coupler H1. On the other hand, the transmitted signal transmitted through the measurement object X3 by the supplied signal and obtained through the output ports 2, 3 and 4 is a directional coupler H.
2, H3, H4 through receivers R2, R3 respectively
Each is received by R4.

Thereafter, the switches S1 to S4 are switched so that the reflected signals and the transmitted signals obtained from the signal from the output terminal A through the output ports 2, 3 and 4 are received by the respective receivers R1 to R4. And measure.

This completes the process of obtaining data for characteristic measurement when signals are input to the respective ports of the 4-port device, and the characteristic is analyzed in the network analyzer based on the obtained data.

Therefore, in this multi-port network analyzer, it is possible to measure the characteristics of a 4-port device, and it is also possible to measure the characteristics of a 2-port device. Two measurement targets can be measured at the same time.

Other embodiments will be listed below.

(1) As shown in FIG. 3, a power splitter PS for dividing a signal into three signals is connected to a single signal source O of a 6-port multiport network analyzer equipped with a 6-data sampler. Circulators C1 to C3 and switches S1 to S for each output
6. Terminators (attenuators) T1 to T6 are connected to measure 3 samples of 2 ports at the same time.

By doing this, when measuring a 2-port device with a 6-port multi-port network analyzer, it is possible to measure 3 devices at the same time. As a result, the processing capacity is tripled. Therefore, the output terminals A as the supply ports of the power splitter PS,
Measurement is completed by performing sampling twice for each signal from B and C. That is, even with 6 ports, 6
It does not require sampling twice.

(2) Although not shown, a power splitter PS of two divisions is connected to a single signal source O of a 6-port multiport network analyzer equipped with a 6-data sampler, and two circulators C1 are provided at each output of the power splitter PS. , C2, six switches S1 to S6, 6
The two terminators T1 to T6 are connected to simultaneously measure an unbalanced 3-port sample.

By doing this, when measuring a 3-port device with a 6-port multi-port network analyzer, it is possible to measure two devices at the same time. As a result, the processing capacity is doubled. Therefore, the measurement is completed with three samplings supplying signals to each of the three ports of each device. That is, even with 6 ports, 6 samplings are not required.

(3) For a multi-port network analyzer having more than 6 output ports, for example, a 9-port multi-port network analyzer can measure three 3-port devices at the same time. . Alternatively, it is possible to measure four 2-port devices simultaneously. In this case, one output port is left. Furthermore, it is possible to measure two 4-port devices simultaneously.

By doing so, the processing capacity is doubled and tripled as compared with the case where only a single device is measured.
It will be doubled and quadrupled.

(4) When a multiport network analyzer having 6 or more output ports is used, an unbalanced 1 port + balanced 1 port device is measured instead of the unbalanced 3 port device. Since a balanced 1-port corresponds to an unbalanced 2-port, a balanced 2-port device is measured instead of an unbalanced 4-port device. In this case, the analysis of the measurement results uses the mathematical balun method.

By doing so, the multi-port network analyzer has the advantage that it can be used as a network analyzer capable of simultaneously measuring a plurality of objects having a small number of ports, while using the mathematical balun method, a balanced device can be obtained. Can be realized.

(5) As shown in FIG. 4, in the multi-port network analyzer (not shown in FIG. 4) having the four output ports shown in the above-mentioned embodiment, two measurement target DUT1s of the same type are used. The DUT2 is made to be able to be measured at the same time, and the two ports at both ends of the DUT1 to be measured of one balanced 4 port and the output ports 1 and 2 are connected via the 180 ° hybrid 20 to obtain another balanced 4 port. The two ports at both ends of the DUT 2 to be measured and the output ports 3 and 4,
By connecting via 180 ° hybrid 21, two balanced 4-port measurement targets DUT1, DUT2
May be converted as unbalanced ports and the characteristics thereof may be simultaneously measured by one multiport network analyzer.

In this case, it is only necessary to change the signal supply in two directions, and it is sufficient to perform sampling twice.
Even when compared with the case where the 80 ° hybrids 20 and 21 are not interposed, the number of times of measurement is reduced, and since two measurement targets DUT1 and DUT2 can be measured at the same time, the efficiency is improved four times.

(6) In each of the above embodiments, the circulator is provided as an insulator, but an attenuator or an isolator may be used instead of the circulator.

If the power splitter has a characteristic that the signal to be measured at the other output is not affected by the sample to be measured connected to the one output, the circulator is not necessary and the cost is reduced. it can. When an attenuator is used instead of the circulator, there are disadvantages such as that the signal given to the sample is attenuated. However, it is generally cheaper than the circulator and can reduce the cost, and it is easy to support a wider band than the circulator. The isolator is almost the same as the one using the circulator, except that the reflected wave of the sample is reflected to the sample side again.

(7) FIG. 5 and FIG. 6 show an example of a component selection apparatus for measuring characteristics of electronic components by using the measuring method of the present invention, determining whether the components are good or not, and selecting the components.

In this component sorting apparatus, a device 30 to be sorted (in this case, a chip component) is placed on a turntable 31 which can be placed and rotated individually, and a terminal of the device 30 on the turntable 31. A multi-port network analyzer 33 that performs characteristic measurement by contacting the measurement probe 32, and a selection that sorts the device 30 whose characteristic has been measured by the multi-port network analyzer 33 into a good product and a defective product based on the measurement result. And the mechanism 34.

The turntable 31 includes one device 3
A disk-shaped rotary table portion 31a provided with cutout portions 35 of a size for temporarily storing only 0 at the outer peripheral edge portion at regular intervals in the circumferential direction, and a position below the rotary table portion 31a. And the device 30 stored in the notch 35
And a fixed table 31b for placing the device 30 so that the device 30 does not fall downward, and a cover 31c for covering the entire upper part of the cutout 35 so that the device 30 does not jump out of the cutout 35.
And a driving means (not shown) such as an electric motor for activating the rotary table portion 31a for one pitch or for rotating a small number of predetermined pitches and then temporarily stopping the operation, and its operation are controlled. A control device 38 is provided and configured.

Only one device 30 is supplied from the feeder F from the opening on the side of the cutout portion 35 at the component receiving position of the rotary table portion 31a in a predetermined rotation phase and accommodated therein.

Two measurement stations 36 and 37 for measuring the characteristics of the device 30 are arranged on the turntable 31 on the lower side in the rotational direction than the component receiving position. Two measuring probes 32 are provided in each of the measuring stations 36 and 37 so as to be vertically movable into and out of the cutout portion 35 through the vertical through holes formed in the fixed table 31b. Each of the measurement probes 32 is controlled by the control device 38 and retracts downward when the rotary table portion 31a is rotating, and protrudes upward when the rotary table portion 31a is stopped to the corresponding port of the device 30. Controlled to touch. Each measurement probe 32 is connected to the corresponding output port 1 to 4 of the multiport network analyzer 33.

On the turntable 31 on the lower side in the direction of rotation than the positions of the measurement stations 36 and 37, a sorting mechanism 34 for sorting the devices 30 between good and defective based on the measurement result by the multiport network analyzer 33. It is arranged.

The control device 38 controls the turntable 31 to move to two.
Measuring stations 36 and 37 each time the pitch is rotated
The multi-port network analyzer 33 is included in the control so that the characteristics measurement described in the above-described embodiment is simultaneously performed on the respective devices 30 located at. Then, the control device 38 selects the good product and the defective product of the device 30 by the selection mechanism 34 based on the measurement result of the multiport network analyzer 33. in this case,
Since the characteristics of the two devices 30 are measured at the same time, the efficiency of the measurement is high, and as a result, automatic good / defective selection can be efficiently performed.

When the characteristics of a 4-port device is measured by using this component sorting apparatus, for example, sorting of good and bad, it is necessary to use four measuring probes 32 of the measuring station 36. Either replace the unit with a new one, or activate four of the four probes with four measuring probes 32 that were previously activated. The output ports of the port network analyzer 33 are switched so that they are connected to each other, and the network analyzer 33 side is also switched so as to be able to measure the characteristics of the 4-port device. This measurement is performed at every feed pitch of the turntable 31. Therefore, in this case, the control device 38 switches the feed pitch of the turntable 31 from 2 pitches to 1 pitch.

In this parts sorter, since a plurality of devices having the same specifications can be simultaneously measured by one multi-port network analyzer, it goes without saying that the parts sorter is inexpensive and has a high measurement capability. A device suitable for low-volume production of a wide variety of products can be provided by simply changing the measurement station so that one device can be measured at the same time for a large number of devices. In other words, there is no need to prepare new equipment for each product, so equipment investment can be suppressed.

The present invention can be used to measure characteristics of various circuit networks as well as elements such as SAW filters and ceramic capacitors.

[0064]

According to the present invention, a signal obtained by distributing a signal from a single signal source by the signal distribution means is output in the state where one or a plurality of ports to be measured are connected to the output ports, respectively. By supplying the measurement target and measuring the characteristics obtained as a result, it is possible to increase the number that can be measured at the same time compared to the conventional case where only one measurement target with a small number of ports can be measured at a time. The measurement efficiency will be improved. In addition, since a signal for characteristic measurement can be supplied to each measurement object via the signal distribution unit, mutual characteristic signals are less likely to affect each other, so that the characteristic measurement for each measurement object can be performed. It can be done accurately.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a main part of a 4-port network analyzer that measures two 2-port devices.

FIG. 2 is a circuit diagram showing a main part of a 4-port network analyzer that measures one 4-port device.

FIG. 3 is a circuit diagram showing a main part of a 6-port network analyzer that measures three 2-port devices.

FIG. 4 is a circuit diagram showing a state in which two devices having balanced ports are connected to an output port of a 4-port network analyzer via a 180 ° hybrid.

FIG. 5 is a partially cutaway plan view showing an outline of a parts selection device.

FIG. 6 is an explanatory view showing a vertical cross section of the measurement station in FIG. 5 and a multi-network analyzer.

FIG. 7 is a circuit diagram showing a main part of a conventional 4-port network analyzer.

FIG. 8 is a circuit diagram showing a main part of a conventional 2-port network analyzer.

[Explanation of symbols]

1-4 output ports 10, 11 Switching means 20,21 180 ° hybrid A, B output terminal (supply port) C1, C2 circulator (insulator) D1-D4 receiving means O signal source PS power splitter (signal distribution means) S1-S4 signal path switching means X1, X2 measurement target

Claims (6)

[Claims] 1. A single signal source, a signal distribution unit that distributes and supplies a signal from the signal source to a plurality of units, an output port to which a plurality of ports of a measurement target can be separately connected, and the signal distribution unit. State in which the signal distributed by the means is input, and the input signal is selectively supplied to the corresponding one of the output ports, and characteristics obtained from the measurement target through the output port Signal path switching means capable of switching to a state of transmitting a signal to a terminator, and receiving means interposed between the signal path switching means and the output port for receiving a characteristic signal obtained from the measurement target. A network analyzer comprising: 2. The network analyzer according to claim 1, wherein each of the signals distributed by the signal distribution means is grouped into a plurality of outputs corresponding to a plurality of measurement targets connected to the output port. A state in which the signal selected from the ports is supplied via the corresponding signal path switching means, and a signal from the signal source is distributed to the signal path switching means without being distributed by the signal distribution means. A network analyzer characterized by being provided with a switching means capable of switching between a supply state and a supply state. 3. The network analyzer according to claim 1, wherein the reflected signal is transmitted from the signal path switching means side to the signal distribution means between the signal distribution means and the signal path switching means. A network analyzer having a suppressor interposed. 4. The network analyzer according to claim 1, wherein the measurement target connected to the output port is a device having a balanced port, and the corresponding port of the device,
A network analyzer, wherein a means for converting a balanced port as an unbalanced port is provided between the output port and the output port. 5. A component selection apparatus including the network analyzer according to claim 1, wherein a plurality of measurement stations each including a probe connected to the output port and capable of contacting a port to be measured. In addition to being installed, it is possible to switch between a state in which the measurement target conveyed to each measurement station is measured at the same time and a state in which only the measurement target at a specific measurement station is measured, and the component to be the measurement target based on the measurement result. A parts selection device comprising a selection means for selecting. 6. A signal distribution means for distributing and supplying a signal from a single signal source to a plurality of supply ports, and an output port to which a plurality of ports of a measurement target can be separately connected. Signal path switching means for selecting one of a plurality of ports to be measured and supplying a signal from the supply port to the selected port, and characteristics obtained from the measurement target by the supplied signal The characteristics of the plurality of measurement targets are simultaneously measured by connecting each of the plurality of measurement target ports to the corresponding output port while interposing a receiving unit that receives a signal. Measuring method with a network analyzer.