| 摘要 |
The invention concerns a self-adaptive band-pass filtering device in a microwave signal transceiver, the receiver being connected to a microwave signal reception antenna (1) connected on the input of a low-noise amplifier (2), a mixer (4) receiving the low-noise amplifier (2) output signal and the signal of a frequency synthesizer (5). The invention is characterised in that the self-adaptive filtering device (3) comprises upstream of the amplifier (2) filtering means (300, 31, 32) with at least two different frequency bands and means (8, 33, 34) for selecting either a filtering means (31, 32) or one of the frequency bands on the basis of the frequency of the signal to be received. |
