A microwave radiometer for measuring signals with a low effective noise temperature

Филатов, А. В.; Karataeva, N. A.; Loshchilov, A. G.

doi:10.1134/s002044120606008x

Cited by 5 publications

(1 citation statement)

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“…4 (Curve 4) shows that the microwave radiometers with four receivers decrease the measuring time twice as much. This dependence is consistent with research carried out earlier [9].…”

Section: Features Of Realizationsupporting

confidence: 82%

Method of radio communication based on non-deterministic radio signals

Ubaichin¹,

Zhuk²

2017

Proceedings of the IV International Research Conference "Information Technologies in Science, Management, Social Sphere and Med

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Abstract-The paper describes a method to make a noiseimmune radio communication system with high emission security. The noise-immunity and emission security of information transmitting are provided through the use of nondeterministic radio signals (white Gaussian noise). The block diagrams of the receiver and transmitter to develop the user hardware equipment are presented. The communication range, detection by means of modern passive radar systems and intentional interference effect are considered.

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“…4 (Curve 4) shows that the microwave radiometers with four receivers decrease the measuring time twice as much. This dependence is consistent with research carried out earlier [9].…”

Section: Features Of Realizationsupporting

confidence: 82%

Method of radio communication based on non-deterministic radio signals

Ubaichin¹,

Zhuk²

2017

Proceedings of the IV International Research Conference "Information Technologies in Science, Management, Social Sphere and Med

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Microwave radiometer for sensor systems with self-contained power supplies

Ubaychin

Uulu

Zhuk

2020

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Purpose This paper aims to describe a new microwave radiometer designed for sensing natural mediums to solve various applied scientific problems. The research findings enable to make assertions about high efficiency of the described microwave radiometer being a part of mobile sensor systems with self-contained power supplies. Design/methodology/approach A new microwave radiometer is based on the modification of the null method. Modification of the null method has been implemented by using two reference noise generators. The first reference noise generator is passive and its implementation is based on the matched load. A low-noise amplifier is used as the second reference noise generator. The use of the low-noise amplifier as the reference noise generator is based on the noise wave generation effect at its input whereby the waves form low-temperature noise. Findings The use of the low-noise amplifier as the reference noise generator in the modified microwave radiometer has made it possible to simplify the device design at the system level while reducing the weight and power consumption and increasing sensitivity. Originality/value The novelty of the modified radiometer lies in the modification of the null method and the removal of high-temperature reference noise generators based on avalanche transit-time diodes. Further, the novelty lies in the invariance of measurement results toward changes in the receiver’s own noise and transmission factor while the design of the device has been simplified.

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