Near-field coupling passive intermodulation test device based on square coaxial structure

A near-field coupling and passive intermodulation technology, applied in receiver monitoring, transmitter monitoring, etc., can solve problems such as test interference, limitation of single physical condition control accuracy, and inaccurate PIM testing, so as to improve product yield, The effect of improving the efficiency of PIM diagnosis

Active Publication Date: 2020-07-28
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the PIM test of a single physical condition is not accurate enough
For cavity devices, the interface of the metal contact is inside the cavity, and the external influence is very limited, which limits the control accuracy of a single physical condition; for the antenna unit, it is necessary to maintain a low PIM environment in the entire darkroom space, and many test instruments themselves will Bring serious PIM products and interfere with the test

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  • Near-field coupling passive intermodulation test device based on square coaxial structure
  • Near-field coupling passive intermodulation test device based on square coaxial structure
  • Near-field coupling passive intermodulation test device based on square coaxial structure

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Embodiment Construction

[0028] Based on the design method proposed by the present invention, a series of near-field coupling PIM test devices with square coaxial structures with different external dimensions can be designed. It should be emphasized that the design method proposed by the present invention is not limited to these two specific test devices, but also includes a series of near-field coupled PIM test devices of this type of square coaxial structure. The following takes the two typical near-field coupling PIM test devices of linear and U-shaped structures as examples to introduce the specific implementation process and usage methods of these two test devices.

[0029] 1) The size parameters of the near-field coupled PIM test device with a linear square coaxial structure are as follows:

[0030] like figure 1 As shown, the square coaxial main body is composed of an inner conductor 3 and an outer conductor 2 6 with a square cross-section, and a transverse slit is formed in the outer conducto...

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Abstract

The invention discloses a near-field coupling passive inter-modulation test device based on a square coaxial structure. The device, on the basis of a conventional PIM test method, realizes a near-field coupling PIM test function by adding a near-field coupling PIM test device to a test system. The device comprises an optimization method for different shapes of square coaxial structures with slits, low-PIM joints and slit size and distribution. The device can be used for evaluating material nonlinearity and contact non-linearity of a microwave component, thereby providing guidance for low-PIM design and process control of the microwave component, providing a detection method for PIM sources in the production process and improving product qualified rate.

Description

technical field [0001] The invention relates to a near-field coupling passive intermodulation testing device and a testing method for metal connection junctions of microwave components based on a square coaxial structure, belonging to the technical field of passive intermodulation testing. Background technique [0002] Passive intermodulation (Passive Inter-Modulation, "PIM" for short) refers to additional interference signals to the system caused by two or more carrier signals of different frequencies passing through nonlinear passive devices. In wireless communication systems, common nonlinear passive devices include duplexers, antennas, feeders, and radio frequency line connectors. If these intermodulation distortion signals fall within the receiving frequency band, and the power exceeds the minimum amplitude of the useful signal in the system, the signal-to-noise ratio of the received signal will be reduced, the sensitivity of the receiver will be reduced or even unable ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04B17/16H04B17/17H04B17/29
CPCH04B17/16H04B17/17H04B17/29
Inventor高凡赵小龙张松昌贺永宁
OwnerXI AN JIAOTONG UNIV