need RxTx 400MHz
时间：04-12
整理：3721RD
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I need Tx-Rx pair 400MHz BW 2kbits, 100 meters
A lot of companies manufactures these kind of chips:
You can search at RFMicrodevices Melexis Atmel and many many others
Al.
Take a look at ready made modules for 433.92 Mhz that offered by some companies - Telecontrolli for example. Cheap enough and save a lot of time and effort.
try radiomaxtrix product
On this site U can find a lot of good books for this pourpose...don't use monolithic modules, you'll loose all your fun!