An incubator box structure and test method for passive intermodulation test

Abstract

The invention discloses an incubator body structure for a passive intermodulation test experiment and an experimental method and belongs to the field of aerospace experiments. The incubator body structure comprises an incubator main body structure, a first connection pipe and a second connection pipe; the first connection pipe and the second connection pipe are connected with the incubator main body structure; the incubator main body structure communicates with the outside through the first connection pipe and the second connection pipe; the incubator main body structure is made of a wave-transmitting material and used for accommodating to-be-tested passive components; and the first connection pipe is used for inputting gas into the incubator main body structure and exhausting the gas in the incubator main body structure. When a PIM test is conducted, the to-be-tested passive components are placed in the incubator body structure, and the high-temperature or low-temperature flight environment of an aircraft can be simulated in an incubator body; and meanwhile, as the incubator body structure is made of the wave-transmitting material, testing results are real and reliable, and the purpose that large component products are subjected to the PIM test in the high-temperature or low-temperature flight environment is achieved.

Description

technical field [0001] The invention relates to a thermostat body structure and a test method for passive intermodulation test, belonging to the field of aerospace test. Background technique [0002] PIM (Passive Inter-modulation, passive intermodulation) is a new source of electromagnetic interference, which is an intermodulation product caused by the inherent nonlinearity of passive components. At present, more and more payload antenna subsystems on spacecraft in my country adopt the common mode of sending and receiving to transmit and receive communication signals. Antennas and some passive components related to antennas, such as filters, coaxial cables, connectors, metal connection surfaces and antenna feeds, etc., work under the condition of high-power signals with multiple carrier frequencies, due to the existence of components Non-linearity causes the PIM effect. The PIM effect has caused serious harm to modern high-power multi-channel spacecraft. [0003] At prese...

AI Technical Summary

Problems solved by technology

[0004] However, the operating environment of the spacecraft is a complex temperature environment of -180-180°C, and the PIM test at room temperature cannot accurately simulate the flight environment of the spacecraft, resulting in distortion of the test results

Images