scholarly journals Low-noise correlation measurements based on software-defined-radio receivers and cooled microwave amplifiers

2016 ◽  
Vol 87 (11) ◽  
pp. 114706 ◽  
Author(s):  
Teemu Nieminen ◽  
Pasi Lähteenmäki ◽  
Zhenbing Tan ◽  
Daniel Cox ◽  
Pertti J. Hakonen
Keyword(s):  
Software Defined Radio ◽  
Low Noise ◽  
Noise Correlation ◽  
Radio Receivers ◽  
Microwave Amplifiers

scholarly journals Low-noise low-power 0.35µm SiGe amplifiers for 3.1-10.6GHz UWB radio receivers

2004 ◽  
Vol 1 (11) ◽  
pp. 317-321 ◽  
Author(s):  
Farid Touati ◽  
Faical Mnif
Keyword(s):  
Low Power ◽  
Low Noise ◽  
Radio Receivers ◽  
Uwb Radio

A New Platform for Radio Astronomy Science Education

2021 ◽  
Vol 105 ◽  
pp. 179-183
Author(s):  
Guang Pu Yang ◽  
Liang Dong ◽  
Le Sheng He ◽  
Fa Xin Shen ◽  
Bin Tian ◽  
...  
Keyword(s):  
Science Education ◽  
High School Students ◽  
Radio Astronomy ◽  
Software Defined Radio ◽  
Electromagnetic Waves ◽  
Neutral Hydrogen ◽  
Low Noise ◽  
Public Understanding ◽  
School Students ◽  
Science Popularization

Radio astronomy telescope can get information from invisible universe by receiving electromagnetic waves. Difference from optical telescopes, there exists many difficulties for making the public understanding the radio astronomy phenomenon. In this paper, we will introduce a new platform for radio astronomy science popularization education in order to help public know radio telescope and radio astronomy. The platform consists of a 0.8meter parabolic antenna, a wide bandwidth low noise amplifier (LNA) and a Software Defined Radio (SDR) terminal. Based on SDR terminal which covers the band from 70MHz to 6GHz, we can get some strong emissions such as the Neutral hydrogen, solar radio bursts and so on in this band. People can carry out many radio astronomy experiments focusing on science popularization by this platform. This new science education tool can interest high school students in science and technology, also students can understand how radio telescopes works.

scholarly journals Design and Analysis of a Continuously Tunable Low Noise Amplifier for Software Defined Radio

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1273 ◽  
Author(s):  
Aayush Aneja ◽  
Xue Li
Keyword(s):  
Software Defined Radio ◽  
Phase Shifter ◽  
Noise Figure ◽  
Frequency Tuning ◽  
Active Phase ◽  
Low Noise ◽  
Low Noise Amplifier ◽  
Impedance Match ◽  
Stable Operation ◽  
Noise Amplifier

This paper presents the design and analysis of a continuously tunable low noise amplifier (LNA) with an operating frequency from 2.2 GHz to 2.8 GHz. Continuous tuning is achieved through a radio frequency impedance transformer network in the input matching stage. The proposed circuit consists of four stages, namely transformer stage, tuning stage, phase shifter and gain stage. Frequency tuning is controlled by varying output current through bias voltage of tuning stage. The circuit includes an active phase shifter in the feedback path of amplifier to shift the phase of the amplified signal. Phase shift is required to further achieve tunability through transformer. The LNA achieves a maximum simulated gain of 18 dB. The LNA attains a perfect impedance match across the tuning range with stable operation. In addition, it achieves a minimum noise figure of 1.4 dB.

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