| 摘要 |
A spread-spectrum communication apparatus includes a receiving antenna (1), amplifiers (2, 3, 6), band-pass filters (4, 8, 10), a threshold filter circuit (5), a despreader (9), a base-band demodulation circuit (11), and other circuit stages. The threshold filter circuit (5) is connected in series before the despreader (9). The threshold filter circuit (5) has a frequency-band width covering the band width of a spread signal and cuts interference waves at certain levels at each frequency within the frequency band. The threshold filter (5) circuit includes a magnetostatic wave device (7). <IMAGE> |
