| 摘要 |
<p>A local oscillator (5) delivers a local signal (SL) with a frequency chosen as a function of the incoming signal (SE) and the intermediate frequency. A primary dephaser (6) formed by two passive networks (7,8) delivers two mixer signals (SM1, SM2) in quadrature. Mixers (3,4) receive the input signal (SE) and the mixer signals (SM1,SM2) and deliver two intermediate signals (SI1,SI2). A secondary dephaser with two passive networks (14,15) introduces a second quadrature phase shift. Summing the outputs of the secondary dephasers eliminates the image signal. <IMAGE></p> |
