Recent advances in the design of compact microwave components based on reactively-loaded transmission lines

2016 ◽  
Author(s):  
Jordi Selga ◽  
Paris Velez ◽  
Marco Orellana ◽  
Jordi Bonache ◽  
Ferran Martin
Keyword(s):  
Transmission Lines ◽  
Recent Advances ◽  
Microwave Components

Standard Gain Horns for Solar Calibration

1967 ◽  
Vol 1 (2) ◽  
pp. 62-64 ◽  
Author(s):  
R. Wielebinski
Keyword(s):  
Low Noise ◽  
Solar Flux ◽  
Absolute Calibration ◽  
Temperature Calibration ◽  
Absolute Value ◽  
Recent Advances ◽  
Microwave Components ◽  
Pyramidal Horn ◽  
The Absolute ◽  
Calibration Techniques

The accuracy of the absolute value of solar flux depends on the temperature calibration techniques and the knowledge of the gain of the aerial used for the measurements. Recent advances in low-noise receivers, microwave components, and amplifier stability have reduced considerably the errors due to temperature calibration techniques. At present the knowledge of the gain of the aerial used for calibrations (usually a pyramidal horn) presents the largest source of doubt of an absolute calibration. Investigations of this problem suggest that a ‘standard gain horn’ should be employed at all observatories in absolute solar calibrations.

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