Transmission reflection method material dielectric constant coaxial test clamp and manufacturing method thereof
A technology of dielectric constant and test fixture, which is applied to the parts of electrical measuring instruments, measuring devices, and measuring electrical variables, etc., can solve the problems of inconvenient connection of test fixtures, improve the inconvenient connection and improve measurement accuracy Effect
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Embodiment 1
[0027] Such as figure 1 , 2 , 3, a coaxial test fixture for the dielectric constant of a transmission-reflection method material, including a connected first connector 1 and a second connector 2; the first connector 1 is a ring structure assembled with the APC7 joint , and the middle part of the first connector 1 of the ring structure is a raised structure 11 with texture, and the two sides of the first connector 1 are respectively the first external thread structure 12 and the second external thread structure 13; the second external thread structure The threaded structure 13 is matched with the side structure of the second connector 2 provided with the internal thread, and the central axis of the second connector 2 is provided with an inner conductor 21, and the inner conductor 21 extends from the side of the second connector 2 provided with the internal thread. Note that the protruding part of the inner conductor 21 is connected through the central axis of the first connect...
Embodiment 2
[0033] In order to obtain the method for the coaxial test fixture of the transmission reflection method material dielectric constant of embodiment 1, the manufacturing method adopted in this embodiment is:
[0034] The traditional coaxial test fixture adopts the form of coaxial unsupported air transmission line, and the common fixture is shown in the figure below. in, Figure 4 For standard coaxial unsupported air transmission lines, Figure 5 The test fixture simplifies the structure on the basis of the standard coaxial unsupported air transmission line, shortens the length, and uses threads on the outside that can be connected to the APC7 connector. Because the inner conductor of the traditional coaxial test fixture has no support, the two ends of the inner conductor are in the form of double pins, which is convenient for fixing the inner conductor. However, when this fixture is used for de-embedding calibration, there is no material in the test fixture, and it is inconven...
Embodiment 3
[0044] The specific implementation steps for the measurement of the dielectric constant of coaxial materials in the 100MHz ~ 18GHz frequency band:
[0045] Design the coaxial test fixture, adopt the APC7 joint form, the overall length is 30mm, the inner conductor is brass plated with gold, the outer shell is brass plated with nickel, the surface roughness of the inner surface is 1.6μm, and the coaxiality is not more than 0.08mm. Among them, the length of the outer conductor on the right side is 20mm, the length of the inner conductor is 30mm, the inner conductor is extended from the left side by 10mm, and the inner conductor is fixed by a dielectric ring; the left part is only composed of the outer conductor, and the length is 10mm, which can The right part is assembled.
[0046] 100MHz~18GHz frequency band material permittivity measurement system is composed of vector network analyzer, test cable, coaxial adapter, test fixture, test platform and so on. Among them, the test f...
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