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Noise coefficient auxiliary measuring apparatus

An auxiliary device and noise figure technology, which is applied in the direction of noise figure or signal-to-noise ratio measurement, can solve the problems of low cost and achieve high-precision measurement

Active Publication Date: 2016-01-27
SHANGHAI NEWAGE INFORMATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention discloses an auxiliary noise figure measurement device, which is used to solve the problem of low-cost measurement of noise figure of low noise figure and low gain systems such as low noise amplifiers in the prior art

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  • Noise coefficient auxiliary measuring apparatus

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with accompanying drawing and embodiment:

[0018] figure 1 is a structural block diagram of the noise figure measurement auxiliary device of the present invention, please refer to figure 1 , a noise figure measurement auxiliary device, wherein, including a circuit board, the circuit board has: a low-frequency radio frequency input interface 10, a low-frequency radio frequency output interface 11, a high-frequency radio frequency input interface 20, a high-frequency radio frequency output interface 21, a negative power supply interface 4. The positive power supply interface 3, the ground interface 5, the low-frequency radio frequency input interface 10 and the low-frequency radio frequency output interface 11 are connected with the first Lange coupler 12, and there are two first shunts connected between the two first Lange couplers 12 , the first branch includes a first low-noise HEMT tube 14 and a fi...

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Abstract

The invention discloses a noise coefficient auxiliary measuring apparatus including a circuit board which includes a low-frequency radio frequency input interface, a low-frequency radio frequency output interface, a high-frequency radio frequency input interface, a high-frequency radio frequency output interface, a cathode power supply interface, an anode power supply interface, and a ground interface. The low-frequency radio frequency input interface and the low-frequency radio frequency output interface are connected with first lange couplers, two first branches are connected between the two first lange couplers, and each first branch includes a first low-noise HEMT tube and a first coupling circuit. The high-frequency radio frequency input interface and the high-frequency radio frequency output interface are connected with second lange couplers, two second branches are connected between the two second lange couplers, and each second branch includes a second low-noise HEMT tube and a second coupling circuit. The measuring apparatus improves the accuracy of the noise coefficient of a low-noise and low-gain radio frequency receiving system by means of a spectrum analyzer and a noise source, and realizes the low-cost and high-accuracy measurement of noise coefficients.

Description

technical field [0001] The invention relates to a measuring device, in particular to an auxiliary noise factor measuring device. Background technique [0002] The low-noise amplifier is an important part of the front-end of the RF receiver. It usually appears in the first stage when the signal enters the receiver. It suppresses noise interference while amplifying the received signal, which is crucial to the noise performance of the entire receiver. [0003] In order to increase the transmission distance of wireless devices, it is usually necessary to place an external low-noise amplifier before the receiver, which requires RF engineers to measure the noise performance of the low-noise amplifier. The usual measurement tool for noise figure is the noise meter, but the price of the noise meter is very expensive, and it is only suitable for the measurement of the noise figure, the utilization rate is low, and the laboratory is usually not equipped. [0004] The spectrum analyze...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/26
Inventor 谢森
Owner SHANGHAI NEWAGE INFORMATION TECH CO LTD
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