A Frequency Multiplication Method Based on Extracting Harmonic From Narrow Pulse

Abstract

Frequency multiplier is a nonlinear circuit that can realize frequency multiplication of input signal with wide application in communication, navigation, radar, and other fields. This paper proposes a frequency multiplication method based on extracting harmonic from a narrow pulse. Then, in accordance with this means, it develops a ten times frequency multiplier, finally achieving frequency multiplication taking the rubidium atomic frequency standard as a reference. The frequency multiplier possesses some features of high-efficient multiplication, low noise floor, simple structure, easy implementation, and cheaper cost. Based on the experimental results, if PRS10, the rubidium atomic frequency standard, is regarded as a reference, the noise floor of frequency multiplier is superior to 1.60E − 12/s. Additionally, the relative frequency error of the output ten times the frequency multiplication signal (100 MHz) is less than 8.00E − 12.

C-band Frequency Generator for Space-borne Synthetic Aperture Radar

“…Further to improve the noise performance, a low noise BJT device is used for noise suppression better than 75 dBc around carrier frequency. This gives noise reduction at higher output frequency than extracting harmonics from narrow pulse [14]. This noise suppression is very much important to incorporate at the end of FG; otherwise, the noise will mask demodulated response up to a few MHz bandwidth.…”