Device for ultra wide band frequency generating

Abstract

Devices () for exchanging ultra wide band signals comprise frequency translating stages () for frequency translating signals and oscillating stages () for supplying main inphase/quadrature oscillation signals to the frequency translating stages (). By providing the oscillating stages () with polyphase filters () for reducing harmonics in oscillation signals, the main oscillation signals will be sufficiently clean. The oscillating stages () comprise mixers () for converting first inphase/quadrature oscillation signals and second inphase/quadrature oscillation signals into the main oscillation signals. The polyphase filters () may be located before and after the mixers (). Frequency selectors () replace prior art multiplexers located after the mixers (). Such frequency selectors () comprise multiplexers () for supplying the second inphase/quadrature oscillation signals, with a combination of these second oscillation signals corresponding with a positive frequency, a negative frequency or a zero frequency, and comprise coders () for controlling the multiplexers ().