Calibration source microwave window of microwave radiometer

A microwave radiometer and microwave radiation technology, which is applied in the direction of measuring devices, instruments, and measuring electrical variables, can solve the problems of unsatisfactory microwave window filling uniformity, poor versatility and flexibility, and large emissivity measurement errors. Achieve good heat insulation effect, flexible combination, and reduce measurement error

Inactive Publication Date: 2012-12-05

中国航天科工集团第二研究院二〇三所

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AI-Extracted Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a microwave window for the calibration source of a microwave radiometer, which solves the problems of u...

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Method used

[0019] During work, 2×n subunits are arranged together to form a tapered hollow gradient array 2. They are buckled on the complementary microwave radiator, covering the microwave radiator with 2×n wedges. The tapered gradient array 1 is integrally formed by a whole piece of polystyrene. Wherein, one side of the tapered array faces outward, and the bottom surface of the tapered tapered array 1 is in contact with the upper surface of the tapered hollow tapered array 2 . The fastening frame 3 is integrally form...

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Abstract

The invention discloses a calibration source microwave window of a microwave radiometer. The calibration source microwave window comprises a tapered gradual change array (1), a tapered hollow gradual change array (2) and a fastening frame (3), wherein the tapered hollow gradual change array (2) is formed by combining 2*n subunits; the tapered gradual change array (1) is molded by integrally machining a whole piece of polystyrene; and the fastening frame (3) is molded by integrally machining polystyrene. 2*n subunits are arranged together so as to form the tapered hollow gradual change array (2); a bright temperature signal radiated from a microwave radiator firstly passes through the tapered hollow gradual change array (2) which is tightly contacted with the microwave radiator, subsequently passes through the tapered gradual change array (1), and finally reaches an outfit plane of the calibrated radiometer so as to accomplish the calibration of the radiometer. The calibration source microwave window has the characteristics of good heat insulation effect, flexible combination mode and strong generality; and moreover, the smooth transition from air characteristic impedance to polystyrene characteristic impedance is achieved; and the measurement error of reflection coefficient of the radiator is reduced effectively.

Application Domain

Electrical measurements

Technology Topic

Reflection coefficientMicrowave radiometer +5

Image

Examples

Experimental program(1)

Example Embodiment

[0016] A microwave window of a microwave radiometer calibration source includes: a cone-shaped gradient array 1, a cone-shaped hollow gradient array 2, and a fastening frame 3.

[0017] The tapered hollow gradient array 2 is composed of 2×n subunits. The sub-units are conical or square cone-shaped, and are made of polystyrene with the same cubic shape. On the sub-units, there is a semi-hollow structure that is complementary to the conical tip of the microwave radiator. The conical tip of the microwave radiator The half of the split is placed in it. The two sub-units are put together to form a complete complementary structure with a microwave radiator cone wedge, and are in close contact. The cone-shaped hollow structure formed by the two sub-units is conical or pyramidal.

[0018] The tapered gradation array 1 is integrally processed and formed by a piece of polystyrene, and the outer contour is rectangular. The tapered array faces outward, and the subunits of the tapered gradient array 1 have a pyramid shape. The bottom surface of the tapered gradient array 1 is in contact with the upper surface of the tapered hollow gradient array 2. The fastening frame 3 is integrally processed and formed of polystyrene, and has a frame structure. The fastening frame 3 is in close contact with the tapered hollow tapered array 2 and the tapered tapered array 1 respectively.

[0019] When working, 2×n sub-units are arranged together to form a cone-shaped hollow gradient array 2. They are buckled on top of the microwave radiator with complementary structure to cover the microwave radiator with 2×n wedges. The tapered gradation array 1 is integrally processed and formed by a single piece of polystyrene. Wherein, the tapered array faces outwards, and the bottom surface of the tapered tapered array 1 and the upper surface of the tapered hollow tapered array 2 are in contact. The fastening frame 3 is integrally processed and formed by polystyrene, and the fastening frame 3 is sleeved outside the tapered hollow gradient array 2 and the tapered gradient array 1 to play a role of reinforcement and heat preservation. The bright temperature signal radiated by the microwave radiator first passes through the tapered hollow gradient array 2 in close contact with it, then passes through the tapered gradient array 1, and finally reaches the mouth surface of the calibrated radiometer, thereby completing the radiometer calibration.

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Description & Claims & Application Information

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