CN103809056B - S parameter and passive intermodulation integrated test system - Google Patents

Abstract

The invention discloses a kind of S parameter and passive intermodulation integrated test system, including equipment under test, Network Analyzer, some PIM units, it is characterized in that, also include PSS signal maincenter, described equipment under test connects the input of PSS signal maincenter, and the outfan of described PSS signal maincenter connects Network Analyzer and PIM unit respectively.The S parameter of the present invention and passive intermodulation integrated test system are capable of the one-stop PIM test completing S parameter and multiple frequency band, thus increase substantially the testing efficiency of product, reduce testing time and testing cost.

Description

S parameter and passive intermodulation comprehensive test system

technical field

The invention relates to a test system, in particular to an S parameter and passive intermodulation comprehensive test system, which belongs to the field of product test equipment.

Background technique

The current rapid development of the communication market puts forward higher and higher requirements for the passive intermodulation indicators of the matching devices. Among them, the test of PIM (Passive Inter Modulation, that is, passive intermodulation) indicators makes the products spend a lot of time in the testing process. It takes a lot of time, especially to test the PIM of multiple frequency bands of the device, which consumes a lot of time, the test efficiency is very low, and the test cost is very high.

In addition, there is a VNA (Vector network analyzer, network analyzer) for testing the S parameters of the device under test (DUT, device under test) in the prior art. Source intermodulation is tested independently and separately, which also makes the test efficiency lower and the test cost more expensive.

Contents of the invention

In order to solve the deficiencies of the prior art, the object of the present invention is to provide a comprehensive testing system for S parameters and passive intermodulation.

In order to achieve the above object, the present invention adopts the following technical solutions:

S-parameter and passive intermodulation comprehensive test system, comprises the equipment under test, network analyzer, some PIM units, is characterized in that, also comprises the PSS signal hub, and the input end of described equipment under test is connected with PSS signal hub, and described PSS The output ends of the signal hub are respectively connected to the network analyzer and the PIM unit.

The aforementioned S parameter and passive intermodulation comprehensive testing system is characterized in that the PSS signal hub includes several switch groups, and the switch groups include a first switch, a second switch, and the first switch and the second switch. The switches are all single-pole multi-throw switches, the first switch includes a plurality of input terminals and an output terminal, the second switch includes an input terminal and a plurality of output terminals, and the device under test is connected to any one of the first switches. The input end, the output end of the first switch is connected to the input end of the second switch, and the PIM unit and the network analyzer are respectively connected to an output end of the second switch.

The aforementioned S-parameter and passive intermodulation comprehensive testing system is characterized in that it also includes a third switch, the third switch includes an input end and an output end, and the input end and the PIM unit of the third switch are respectively connected to the second One output end of the switch is connected, and the output end of the third switch is connected to a network analyzer.

The aforementioned S-parameter and passive intermodulation comprehensive test system is characterized in that it also includes a third switch, the third switch includes two input terminals and two output terminals, and the output terminals of each third switch are connected to a In a network analyzer, the PSS signal hub includes a first group of switches and a second group of switches, an output end of the third switch is connected to an output end of the second switch in the first group of switches, The other output end of the third switch is connected to an output end of the second switch in the second switch group.

The benefit of the present invention is that: the S-parameter and passive intermodulation comprehensive test system of the present invention can realize the one-stop completion of the PIM test of S-parameter and multiple frequency bands, thereby greatly improving the test efficiency of products, reducing test time and cost of testing.

Description of drawings

Fig. 1 is the structural representation of a preferred implementation of S parameter and passive intermodulation comprehensive test system of the present invention;

Fig. 2 is a schematic structural diagram of a preferred implementation of the PSS signal hub of the present invention.

Meanings of reference signs in the figure:

1. The device under test, 2. The first switch of the first switch group, 3. The second switch of the first switch group, 4. The first switch of the second switch group, 5. The second group Toggle the second switch of the switch group, 6. Network analyzer, 7. The first port of the first PIM unit, 8. The first port of the second PIM unit, 9. The second port of the second PIM unit 10, the second port of the first PIM unit, 11, the third switch, 12, ultra-low intermodulation absorption load, 13, ultra-low intermodulation attenuator.

detailed description

The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

Shown in Fig. 1, S parameter and passive intermodulation comprehensive test system of the present invention, comprise device under test 1, network analyzer 6, some PIM units, also comprise PSS signal center, the input of device under test 1 connection PSS signal center terminal, and the output terminal of the PSS signal hub is respectively connected to the network analyzer 6 and the PIM unit. The number of PIM units in the present invention can be one or more, and the selection of the number is determined according to the test requirements. For example, when it is necessary to perform S-parameter and single-frequency passive intermodulation tests, the output of the PSS signal hub in Figure 1 is connected to a PIM intermodulation tester and a network analyzer 6 to meet the requirements. When performing S-parameter and 2-frequency PIM tests, the output of the PSS signal hub in Figure 1 is connected to a PIM intermodulation tester and two network analyzers 6 to meet the requirements. For another example, when S parameters and 3-frequency point PIM tests need to be carried out, the output of the PSS signal hub in Fig. 1 is connected to a PIM intermodulation tester and three network analyzers 6 to meet the requirements. PIM unit 1 to PIM unit n marked in , where n is any positive integer. In addition, in the present invention, the type and quantity of the equipment under test 1 are not limited, and the equipment under test 1 may be passive components such as antennas, filters, power splitters, couplers, and cable assemblies. The PSS signal hub in the present invention (please explain the meaning of the name and what PSS means) is used to connect the device under test 1 to the VNA and the PIM unit respectively, so as to complete different functions by switching the internal channel in the PSS signal hub. the test content. Therefore, the present invention can be applied to rapid testing in the field of passive devices such as antennas, filters, power splitters, couplers and cable assemblies.

A preferred implementation structure of the PSS signal hub of the present invention will be described in detail below. As shown in Figure 2, the PSS signal hub includes several switch groups, the switch group includes a first switch 2, a second switch 3, the first switch 2 and the second switch 3 are single-pole multi-throw switches, the first switch 4 includes Multiple input terminals and one output terminal, the second switch includes one input terminal and multiple output terminals, the device under test 1 is connected to any input terminal of the first switch 4, and the output terminal of the first switch is connected to the input of the second switch 5 terminal, the PIM unit and the network analyzer 6 are respectively connected to an output terminal of the second switch 5 .

In each switching switch group, in actual use, the first switch and the second switch 5 can be cut, so as to realize the switch connection between the device under test 1 and the different ports of the network analyzer 6 and different PIM sets, thereby realizing different Test content.

In practice, in order to better realize switching and on-off between the device under test 1 and the network analyzer 6, the present invention may also include a third switch 11, the third switch 11 includes an input end and an output end, and the third switch The input end of 11 and the PIM unit are respectively connected to an output end of the second switch, and the output end of the third switch 11 is connected to the network analyzer 6 . Therefore, switching between the device under test 1 and the network analyzer 6 can be realized by turning on and off the third switch 11 . The present invention does not limit the number of input terminals and output terminals of the third switch 11, the output terminal of the third switch 11 may also be connected to one or more network analyzers 6, and multiple network analyzers 6 may be connected to the output terminal of the third switch 11 At this time, it can be realized that for a device under test 1, the S parameter of the device under test 1 can be tested by switching the third switch 11 through different network analyzers 6, so that the measurement of the S parameter is more accurate.

The following describes the preferred embodiment when multiple switch groups are used in the PSS signal hub of the present invention. The PSS signal hub adopts two switch groups for illustration, and it can be analogized when there are more switch groups. As shown in Figure 2, at this time also include the 3rd switch 11, the 3rd switch 11 comprises two input terminals and two output terminals, the output terminal of each 3rd switch 11 all connects a network analyzer 6, PSS signal central Including the first group of switch groups and the second group of switch groups, one output end of the third switch 11 is connected to an output end of the second switch in the first group of switch groups, and the other output end of the third switch 11 is connected to the One output end of the second switch in the second switch group is connected.

When the third switch 11 includes two input terminals and two output terminals, as shown in Figure 2, the two output terminals are respectively connected with a network analyzer 6, so when a certain device under test 1 is subjected to S parameter analysis During the measurement, the third switch 11 can be switched to measure the S parameter on each network analyzer 6, so that the measurement of the S parameter is more accurate. On the other hand, when the input terminals of the first switch in each group of switch groups in Fig. 2 are connected with the device under test 1, as shown in Fig. 2, the second switch group in the first group of switch groups An output end of the switch is connected to an input end of the third switch 11, and an output end of the second switch in the second group of switch groups is connected to the other input end of the third switch 11. The present invention can switch the third switch 11 , realizing that an output end of the second switch in the first set of switch groups is connected to a network analyzer 6, while at the same time an output end of the second switch in the second set of switch groups is connected with another network analyzer 6, thereby Realize parallel and simultaneous testing of S parameters for multiple devices under test 1 .

Further, in the present invention, multiple output ends of the second switch of each diverter switch group can be provided, so the second switch of each diverter switch group can be connected to multiple PIM units, or can be connected to multiple PIM units of one PIM unit. ports to achieve different test content. For example, as shown in Figure 2, the first group of diverter switch groups is connected to the second port 9 of the second PIM unit and the second port 10 of the first PIM unit, and the second group of diverter switch groups is connected to the first The first port 7 of the PIM unit and the first port 8 of the second PIM unit.

In addition, in the present invention, the distinction between the first group of diverter switch groups and the second group of diverter switch groups is only for the convenience of description, and the distinction between the first PIM unit and the second PIM unit for the PIM unit is only For the convenience of description.

In summary, the S-parameter and passive intermodulation comprehensive test system of the present invention can realize one-stop completion of S-parameter and PIM test of multiple frequency bands, thereby greatly improving product test efficiency, reducing test time and test cost.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the above-mentioned embodiments do not limit the present invention in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (3)

1.S parameter and passive intermodulation integrated test system, including equipment under test, Network Analyzer, some PIM units, it is characterized in that, also include PSS signal maincenter, described equipment under test connects the input of PSS signal maincenter, and the outfan of described PSS signal maincenter connects Network Analyzer and PIM unit respectively；Described PSS signal maincenter includes some switching switches set, described switching switches set includes the first switch, second switch, described first switch and second switch are single pole multiple throw, described first switch includes multiple input and an outfan, described second switch includes an input and multiple outfan, described equipment under test connects arbitrary input of the first switch, the outfan of described first switch connects the input of second switch, and described PIM unit is connected with an outfan of second switch respectively with Network Analyzer.

S parameter the most according to claim 1 and passive intermodulation integrated test system, it is characterized in that, also include the 3rd switch, described 3rd switch includes input and outfan, the input of described 3rd switch is connected with an outfan of second switch respectively with PIM unit, and the outfan of described 3rd switch connects Network Analyzer.

S parameter the most according to claim 1 and passive intermodulation integrated test system, it is characterized in that, also include the 3rd switch, described 3rd switch includes two inputs and two outfans, the outfan of each 3rd switch is all connected with a Network Analyzer, described PSS signal maincenter includes first group of switching switches set and second group of switching switches set, in one outfan of described 3rd switch and first group of switching switches set, an outfan of second switch is connected, in another outfan of described 3rd switch and second group of switching switches set, an outfan of second switch is connected.