Title :
A very low spurious frequency doubler module for local oscillators
Author :
Yamaguchi, Yo ; Nosaka, Hideyuki ; Muraguchi, Masahiro ; Yamagishi, Akihiro
Author_Institution :
Wireless Syst. Lab., NTT Network Innovation Labs., Kanagawa, Japan
Abstract :
A very low spurious frequency doubler module for local oscillators is proposed. The key of this technique is to change the input signal into a rectangular wave, which effectively suppresses the fundamental frequency and the odd harmonic components. The maximum desired-to-undesired signal ratio (D/U) is 50 dB. The proposed doubler can eliminate the need for band-pass fillers (BPFs), which occupy a large amount of space in radio frequency (RF) equipment
Keywords :
direct digital synthesis; frequency multipliers; modules; radiofrequency oscillators; direct digital frequency synthesizers; fundamental frequency suppression; input signal; local oscillators; maximum desired-to-undesired signal ratio; odd harmonic components; radio frequency equipment; rectangular wave; very low spurious frequency doubler module; Band pass filters; Clocks; Communication switching; Frequency synthesizers; Laboratories; Local oscillators; Mixers; Power harmonic filters; Radio frequency; Voltage;
Conference_Titel :
Radio and Wireless Conference, 1999. RAWCON 99. 1999 IEEE
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-5454-0
DOI :
10.1109/RAWCON.1999.810988
