A multi-channel filtered electrical connector insertion loss test fixture

Abstract

The utility model discloses a kind of multi-channel filter electric connector insertion loss test fixture, including metal box and sealing cover is equipped on the metal cover of metal box, the opposite two box walls of metal box are respectively equipped with same number of multiple radio frequency coaxial connectors, the inner end of each radio frequency coaxial connector is respectively connected with the one end of a shielded wire, and the other end of multiple shielded wires corresponding with multiple radio frequency coaxial connectors on two box walls is respectively connected with two connector plugs.The utility model is installed multiple radio frequency coaxial connectors on metal box, and is connected with corresponding connector plug by multiple shielded wires, to achieve the purpose of integrating multiple test lines in the same test fixture, when the contact piece of measured filter electric connector needs to be switched, just need to connect different radio frequency coaxial connectors outside metal box, without starting and closing metal cover, significantly improve test efficiency, more convenient in high temperature or low temperature environment application.

Description

Technical Field

[0001] This utility model relates to a test fixture for insertion loss of a filter electrical connector, and more particularly to a test fixture for insertion loss of a multi-channel filter electrical connector that facilitates line switching. Background Technology

[0002] Filtered electrical connectors not only perform the energy and signal transmission functions of traditional electrical connectors but also have the ability to filter out electromagnetic interference signals in transmission lines. They are currently widely used in aviation, aerospace, communication, and radar equipment to solve signal interference problems between electronic devices and systems. Insertion loss is an indicator of a filtered electrical connector's ability to suppress interference signals. Designing appropriate test fixtures to measure the insertion loss value of filtered electrical connectors is of great significance for their design and application.

[0003] like Figure 1 As shown, a traditional filter connector insertion loss test fixture includes a fixture box 2 and a cover plate 1 with a sealing cover mounted on the fixture box 2. Both the fixture box 2 and the cover plate 1 are made of a metal material with good conductivity. RF connectors 6 are respectively installed on the opposite side walls of the fixture box 2. A partition 4 is provided in the middle of the fixture box 2. The partition 4 has mounting holes 5. The inner ends of the two RF connectors 6 are connected to one end of a wire 3, and the other end of the wire 3 is located near the mounting holes 5.

[0004] Currently, network analyzers are commonly used in the industry to test the insertion loss of filter connectors. The circuit connection during testing is as follows: Figure 2 As shown. Combined with Figure 1 and Figure 2 During testing, the filter connector 9 is installed in the fixture housing 2 through the mounting hole 5, and the input and output ends of the filter connector 9 are connected to the two wires 3 respectively. The outer ends of the two RF connectors 6 are connected to the RF input and RF output ends of the network analyzer 7 respectively through the coaxial cable 8. In this way, the input and output ends of the filter connector 9 are connected to the RF output and RF input ends of the network analyzer 7 respectively, and the insertion loss value can be directly read from the network analyzer 7.

[0005] The aforementioned traditional filter connector insertion loss test fixture has the following drawbacks: it only has two RF connectors and two wires, meaning there is only one test channel, allowing connection to only one contact of the filter connector at a time. However, in practical applications, it is often necessary to connect multiple contacts of the filter connector for testing. Under normal temperature conditions, when switching the contacts of the filter connector under test is required, the cover plate must be repeatedly opened and closed, and the corresponding test contact connection must be completed inside the fixture housing before closing the cover plate again, resulting in extremely low testing efficiency. Moreover, when testing the insertion loss of the filter connector at high temperatures (125℃) or low temperatures (-55℃), switching the test circuit becomes very difficult, or even impossible. Utility Model Content

[0006] The purpose of this invention is to provide a multi-channel filter connector insertion loss test fixture that facilitates line switching in order to solve the above-mentioned problems.

[0007] This utility model achieves the above objectives through the following technical solutions:

[0008] A multi-channel filter electrical connector insertion loss test fixture includes a metal housing and a metal cover plate with a sealing cover mounted on the metal housing. Multiple RF coaxial connectors of the same number are respectively installed on two opposite walls of the metal housing. A metal partition is provided in the middle of the metal housing, and the metal partition has electrical connector mounting holes. The inner end of each RF coaxial connector is connected to one end of a shielded wire. The other ends of the shielded wires corresponding to the multiple RF coaxial connectors on one of the housing walls are respectively connected to a first connector plug. The other ends of the shielded wires corresponding to the multiple RF coaxial connectors on the other housing wall are respectively connected to a second connector plug. The first connector plug and the second connector plug are respectively located on both sides of the metal partition plate.

[0009] Preferably, to achieve better signal shielding and facilitate connection between the RF coaxial connector and the shielded wire, the shielded wire includes a cable and a metal anti-surge conduit. The cable includes a wire core and an insulating layer covering the wire core. The metal anti-surge conduit is fitted over the cable. The housing of the RF coaxial connector is connected to a tubular first metal adapter. The first metal adapter passes through the corresponding wall of the metal housing. One end of the metal anti-surge conduit of the shielded wire is fitted onto the inner outer wall of the corresponding first metal adapter. The center pin of the RF coaxial connector is welded to one end of the wire core of the corresponding shielded wire, and the weld is located in the center through hole of the first metal adapter.

[0010] Preferably, to facilitate better grounding of the shielded wire's metal waveguide and the connector plug's housing, the other end of the shielded wire is connected to a tubular second metal adapter. The other end of the shielded wire's metal waveguide is fitted onto the outer wall of one end of the corresponding second metal adapter. The shielded wire passes through the central through-hole of the second metal adapter, which is mounted on a grounding metal plate and in close contact. The grounding metal plate is in close contact with the housing of either the first or second connector plug. In this way, the housings of the first and second connector plugs are connected to the metal outer shell via the grounding metal plate, the second metal adapter, the shielded wire's metal waveguide, and the first metal adapter, achieving a good grounding function.

[0011] Preferably, in order to facilitate quick docking with the filter connector under test, the first connector plug is an interlocking connector plug that matches one connection end of the filter connector under test, and the second connector plug is a pin tail connector plug that matches the other connection end of the filter connector under test.

[0012] Preferably, for ease of processing, the metal box is made of multiple metal plates spliced ​​together or formed in one piece.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention integrates multiple test lines into a single test fixture by installing multiple RF coaxial connectors on a metal housing and connecting them to the corresponding connector plugs via multiple shielded wires. When it is necessary to switch the contacts of the filter connector under test, it is only necessary to connect different RF coaxial connectors outside the metal housing without opening or closing the metal cover, which significantly improves test efficiency and makes it more convenient for use in high-temperature or low-temperature environments. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a traditional filter connector insertion loss test fixture, with the cover plate in the open position.

[0016] Figure 2 This is a circuit diagram for the application of a traditional filter connector insertion loss test fixture.

[0017] Figure 3 This is a three-dimensional structural diagram of the multi-channel filter electrical connector insertion loss test fixture of this utility model after removing the metal cover plate;

[0018] Figure 4 This is a cross-sectional view of the connection between the shielded wire and related components of the multi-channel filter electrical connector insertion loss test fixture of this utility model. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] like Figure 3 and Figure 4 As shown, the multi-channel filter connector insertion loss test fixture of this utility model includes a metal housing 10 and a metal cover plate (not shown in the figure, but can be referenced) with a sealing cover mounted on the metal housing 10. Figure 1 The cover plate 1) and the metal housing 10 are equipped with the same number of radio frequency coaxial connectors 11 on the two opposite walls of the metal housing 10. The metal housing 10 is provided with a metal partition 14 in the middle. The metal partition 14 is provided with electrical connector mounting holes 15. The inner end of each radio frequency coaxial connector 11 is connected to one end of a shielded wire 12. The other end of the shielded wires 12 corresponding to the multiple radio frequency coaxial connectors 11 on one of the housing walls is connected to the first connector plug 13. The other end of the shielded wires 12 corresponding to the multiple radio frequency coaxial connectors 11 on the other housing wall is connected to the second connector plug 16. The first connector plug 13 and the second connector plug 16 are respectively located on both sides of the metal partition 14.

[0021] like Figure 3 and Figure 4 As shown, preferably, to achieve better signal shielding and facilitate connection between the RF coaxial connector 11 and the shielded wire 12, the shielded wire 12 includes a cable 18 and a metal anti-surge guide 19. The cable 18 includes a wire core (not separately marked in the figure) and an insulating layer (not separately marked in the figure) covering the wire core. The metal anti-surge guide 19 is fitted over the cable 18. The housing of the RF coaxial connector 11 is connected to a tubular first metal adapter 17, which passes through the corresponding wall of the metal housing 10. One end of the metal anti-surge guide 19 of the shielded wire 12 is fitted onto the inner outer wall of the corresponding first metal adapter 17. The center pin of the RF coaxial connector 11 is connected to the corresponding shielded wire 12. One end of the wire core is soldered, and the solder joint is located in the central through hole of the first metal adapter 17; to facilitate better grounding of the metal waveguide 19 of the shielded wire 12, the other end of the shielded wire 12 is connected to a tubular second metal adapter 20, and the other end of the metal waveguide 19 of the shielded wire 12 is fitted onto the outer wall of one end of the corresponding second metal adapter 20. The cable 18 of the shielded wire 12 passes through the central through hole of the second metal adapter 20, and the second metal adapter 20 is mounted on the grounding metal plate 21 and in close contact. The grounding metal plate 21 is in close contact with the housing of the corresponding first connector plug 13 or the housing of the second connector plug 16; to facilitate connection with the filter connector to be tested (reference) Figure 2The filter connector 9 to be tested is quickly connected. The first connector plug 13 is a mating connector plug that matches one connection end of the filter connector to be tested, and the second connector plug 16 is a pin tail connector plug that matches the other connection end of the filter connector to be tested. For ease of processing, the metal housing 10 is made of multiple metal plates spliced ​​together or integrally formed.

[0022] Combination Figures 2-4 When applying, connect the filter connector to be tested (reference). Figure 2 The filter connector 9 to be tested is mounted on the metal partition 14 through the connector mounting hole 15. The first connector plug 13 and the second connector plug 16 are connected to the two ends of the filter connector to be tested, respectively. The metal cover is then placed on top. The two RF coaxial connectors 11 corresponding to the contacts of the filter connector to be tested are connected to the network analyzer (reference) via RF coaxial cables. Figure 2 Connect the network analyzer 7) to perform insertion loss tests on the corresponding contact. After completing the test of one contact, simply transfer the RF coaxial cable to the two RF coaxial connectors 11 corresponding to the next contact to perform the test of the next contact. There is no need to open and close the metal cover, making it convenient and quick to use.

[0023] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A multi-channel filter connector insertion loss test fixture, comprising a metal housing and a metal cover plate with a sealing cover mounted on the metal housing, characterized in that: The metal enclosure has multiple RF coaxial connectors installed on its two opposite walls. A metal partition is located in the middle of the metal enclosure, and the metal partition has electrical connector mounting holes. The inner end of each RF coaxial connector is connected to one end of a shielded wire. The other ends of the shielded wires corresponding to the multiple RF coaxial connectors on one wall are connected to a first connector plug. The other ends of the shielded wires corresponding to the multiple RF coaxial connectors on the other wall are connected to a second connector plug. The first connector plug and the second connector plug are located on opposite sides of the metal partition.

2. The multi-channel filter connector insertion loss test fixture according to claim 1, characterized in that: The shielded conductor includes a cable and a metal anti-surge conduit. The cable includes a core and an insulating layer covering the core. The metal anti-surge conduit is fitted over the cable. The housing of the RF coaxial connector is connected to a tubular first metal adapter. The first metal adapter passes through the corresponding wall of the metal housing. One end of the metal anti-surge conduit of the shielded conductor is fitted onto the inner outer wall of the corresponding first metal adapter. The center pin of the RF coaxial connector is welded to one end of the core of the corresponding shielded conductor, and the weld is located in the center through hole of the first metal adapter.

3. The multi-channel filter connector insertion loss test fixture according to claim 2, characterized in that: The other end of the shielded wire is connected to a tubular second metal adapter. The other end of the shielded wire's metal waveguide is fitted onto the outer wall of one end of the corresponding second metal adapter. The cable of the shielded wire passes through the central through hole of the second metal adapter. The second metal adapter is mounted on a grounding metal plate and is in close contact with it. The grounding metal plate is in close contact with the housing of the corresponding first connector plug or the housing of the second connector plug.

4. The multi-channel filter electrical connector insertion loss test fixture according to any one of claims 1-3, characterized in that: The first connector plug is a mating connector plug that matches one connection end of the filter electrical connector under test, and the second connector plug is a pin tail connector plug that matches the other connection end of the filter electrical connector under test.

5. The multi-channel filter electrical connector insertion loss test fixture according to any one of claims 1-3, characterized in that: The metal box is made of multiple metal plates spliced ​​together or formed in one piece.

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