![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Abstract
Two practical methods for measurement of noise factor in centimetric radar receiver are described. The first method applies to the I-F amplifiers (30–60 mc./sec.), and the second method applies to the system consisting of the mixer followed by the I-F amplifier (3000–10,000 mc./sec.). It has been found that results obtained by these methods have been consistent to about ±2 per cent with exceptions due to traceable causes. Detailed calculation of the overall noise factor of the crystal mixer followed by an I-F amplifier has also been presented with a critical discussion.