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Method for measuring active phased-array antenna noise temperature

A phased array antenna, noise temperature technology, applied in transmission monitoring, transmitter monitoring, receiver monitoring, etc., can solve problems such as complex measurement calculations, achieve good measurement repeatability, reduce the impact of measurement results, and be popularized and the effect of applying the value

Active Publication Date: 2016-11-09
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Application Information

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Problems solved by technology

[0004] 2. When this method measures the equivalent noise temperature of the active phased array or its sub-array receiving system, it needs to accurately measure the phased array unit gain and the power loss coefficient of unit synthesis, and the measurement calculation is more complicated

Method used

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  • Method for measuring active phased-array antenna noise temperature
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  • Method for measuring active phased-array antenna noise temperature

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Embodiment Construction

[0035] refer to figure 1 and figure 2 , The test system consists of a normal temperature load, a low noise amplifier, a radio frequency test cable, a spectrum analyzer and an active phased array antenna to be tested. By measuring the beam pointing of the active phased array antenna to the sun, the beam pointing of the active phased array antenna away from the sun and the noise power of the normal temperature load, the noise temperature of the active phased array antenna system and the receiver temperature can be calculated. At the equivalent noise temperature, the active phased array antenna noise temperature is calculated.

[0036] attached figure 1 and figure 2 Shown is a schematic diagram of the principle of measuring the noise temperature of an active phased array antenna. In the specific embodiment, the active phased array antenna works in the Ku band, and the working frequency ranges from 12.25 GHz to 12.75 GHz. The test frequency is 12.50GHz, the noise temperatur...

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Abstract

The invention discloses a method for measuring active phased-array antenna noise temperature. The method comprises the following steps: respectively measuring noise power of each of the beam pointing alignment sun of the active phased-array antenna and the beam pointing deviation sun of the active phased-array antenna, thereby computing the noise temperature of the active phased-array antenna system; and then upwardly pointing the beam of the active phased-array antenna, and placing the room temperature load at the aperture surface of the antenna to measure the noise power output by the system, computing the equivalent noise temperature of an active phased-array antenna receiver; and finally, computing the noise temperature of the active phased-array antenna according to the noise temperature of the active phased-array antenna system and the equivalent noise temperature of the receiver. The method disclosed by the invention is simple and applicable, and has promotion and application value.

Description

technical field [0001] The invention relates to an active phased array antenna, and is particularly suitable for measuring the noise temperature of the active phased array antenna. Background technique [0002] Active phased array antenna has many excellent performances such as low profile, light weight, small size, easy conformation, single or multiple beams, beam scanning and beam reconfiguration, etc. It is used in phased array radar, satellite payload It has been widely used in fields such as communication satellite communication in motion. Noise temperature is one of the important performance indicators of active phased array antenna receiving system. Since each antenna unit of the active phased array antenna has a transmit / receive (T / R) component and is integrated with the antenna unit, the traditional passive antenna noise temperature measurement method is not suitable for active phased array antenna noise Measurement of temperature. At present, there are few liter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/10H04B17/20
CPCH04B17/101H04B17/102H04B17/20
Inventor 秦顺友陈辉韩国栋石磊张文强
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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