Miniaturized single-channel concurrent dual-band mixing architecture with one frequency-divided local oscillator

摘要

Concurrent dual-band transceiver system is widely used in conditions where transceivers are required to work in different bands at the same time.In order to miniaturize the concurrent dual-band transceiver system and reduce the number of components in a transceiver,a novel receiver mixing structure with one frequency-divided local oscillator is proposed.Compared to traditional mixing architecture with two local oscillators,the proposed structure reduces a local oscillator and a bandpass filter.In addition,the output signal of proposed mixing architecture has a better error vector magnitude(EVM)performance.The proposed mixing architecture is described in detail;the method of local oscillator signal frequency selection and the applicable conditions of the proposed structure are derived through math formula;and the conclusions are demonstrated by experimental results.