Antenna Noise Temperature of the Feed System for Shanghai VGOS Radio Telescope

2020 ◽  
pp. 567-572
Author(s):  
Zheng Xiong Sun ◽  
Jin Qing Wang ◽  
Guang Li Wang
Keyword(s):  
Radio Telescope ◽  
Noise Temperature ◽  
Feed System

The designing, manufacturing, and testing of a dual-band feed system for the Parkes radio telescope

2005 ◽  
Vol 47 (3) ◽  
pp. 13-19 ◽  
Author(s):  
C. Granet ◽  
H.Z. Zhang ◽  
A.R. Forsyth ◽  
G.R. Graves ◽  
P. Doherty ◽  
...  
Keyword(s):  
Radio Telescope ◽  
Dual Band ◽  
Feed System

Mechanical analysis of orbit tracking movement of feed system in large spherical radio-telescope

2005 ◽  
Vol 26 (9) ◽  
pp. 1197-1203
Author(s):  
Liu Ming-zhi ◽  
Shen Yu-ru ◽  
Liu Jun ◽  
Na Bai
Keyword(s):  
Radio Telescope ◽  
Mechanical Analysis ◽  
Feed System ◽  
Orbit Tracking ◽  
Tracking Movement ◽  
Large Spherical

scholarly journals Practical Limits in the Sensitivity-Linearity Trade-off for Radio Telescope Front Ends in the HF and VHF-low Bands

2016 ◽  
Vol 05 (02) ◽  
pp. 1650004 ◽  
Author(s):  
R. H. Tillman ◽  
S. W. Ellingson ◽  
J. Brendler
Keyword(s):  
Radio Telescope ◽  
Integrated Circuit ◽  
Noise Temperature ◽  
Low Frequency ◽  
Low Noise ◽  
Primary Concern ◽  
Radio Telescopes ◽  
Small Component ◽  
Trade Off ◽  
System Temperature

Radio telescope front ends must have simultaneously low noise and sufficiently-high linearity to accommodate interfering signals. Typically these are opposing design goals. For modern radio telescopes operating in the HF (3–30[Formula: see text]MHz) and VHF-low (30–88[Formula: see text]MHz) bands, the problem is more nuanced in that front end noise temperature may be a relatively small component of the system temperature, and increased linearity may be required due to the particular interference problems associated with this spectrum. In this paper, we present an analysis of the sensitivity-linearity trade-off at these frequencies, applicable to existing commercially-available monolithic microwave integrated circuit (MMIC) amplifiers in single-ended, differential, and parallelized configurations. This analysis and associated findings should be useful in the design and upgrade of front ends for low frequency radio telescopes. The analysis is demonstrated explicitly for one of the better-performing amplifiers encountered in this study, the Mini-Circuits PGA-103, and is confirmed by hardware measurements. We also present a design based on the Mini-Circuits HELA-10 amplifier, which is better-suited for applications where linearity is a primary concern.

A new dual-reflector feed system for the Nancay radio telescope

1997 ◽  
Vol 45 (9) ◽  
pp. 1366-1373 ◽  
Author(s):  
C. Granet ◽  
G.L. James
Keyword(s):  
Radio Telescope ◽  
Feed System

The dual-band LP feed system for the Sardinia Radio Telescope prime focus

2010 ◽  
Author(s):  
G. Valente ◽  
T. Pisanu ◽  
P. Bolli ◽  
S. Mariotti ◽  
P. Marongiu ◽  
...  
Keyword(s):  
Radio Telescope ◽  
Dual Band ◽  
Feed System
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