| 摘要 |
<p>The present invention relates to a radio frequency mixer circuit comprising a first terminal (102), a local oscillator terminal (103) and a second terminal (104); a wave propagation medium (105) having a first (105a) and second end (105b), where the mixer circuit further comprises a circulator (106) coupling together the first terminal (102), the first end (105a) of the wave propagation medium and the second terminal (104), a switching means (107) operable according to a signal coupled to the LO terminal (103), the switching means being coupled to the second end (105b) of the wave propagation medium for causing a reflection with unchanged voltage wave polarity when the switching means is in an open state, or a reflection with inverted voltage wave polarity when the switching means is in a closed state, at the second end of the wave propagation medium when a wave is travelling therein.</p> |
