求助：CC1200能用CC1190射频增距器增加传输距离吗？

求助：CC1200能用CC1190射频增距器增加传输距离吗？

没有参考设计，可以看如下e2e论坛帖子， 可参考CC1120+CC1190的参考设计，直接copy 1190部分

http://e2e.ti.com/support/wireless_connectivity/proprietary_sub_1_ghz_simpliciti/f/156/p/402794/1426323?keyMatch=CC1200%20CC1190&tisearch=Search-EN-Everything

For this you need to combine 2 of the reference design

CC1200 part (868/915 MHz): Use the CC112x+IPC reference design (www.ti.com/lit/zip/swrr107). Replace CC1120 with CC1200, C231 should be 1.5 nF, crystal needs to be changed to 40 MHz. 

CC1190 part (915 MHz): Copy the CC1190 part from the CC1120+CC1190 reference design (www.ti.com/lit/zip/swrr089). Connect the SAW filter to C203 in the CC112x+IPC design.

CC1190 part (868 MHz): Copy the CC1190 part from the CC1120+CC1190 reference design (www.ti.com/lit/zip/swrr092). Connect the SAW filter to C203 in the CC112x+IPC design.

[Q]If i use Johanson 0900PC15J0013 Balun between CC1200 and CC1190, do i still need U1 (SAW Filter)? If yes, it should just connect to pin 7 (ANT) of the johanson balun? do i still need L111 & C111 between SAW filter and CC1190?

[A]Yes, you would need the saw filter to attenuate the phasenoise at the band edge to pass regulation. It's recommended to keept the two components between the saw and cc1190 for best performance. You can connect the saw filter directly to the balun output.