why difference distance with package 7×7 and 5×5

hi all,

have any advice about ?
we have been measure the distance about coprocessor and sensor.
it seem get difference distance with package.(7xd and 5xd)

5xd:
200m
7xd:

more than 400m

sdk: 1.30.00 

TI-15.4-STACK-GATEWAY-LINUX-SDK gateway:   2.01.00 

system : ubuntu 14.01 LTS

Thank you for considering my request.

Viki Shi：

E2E工程师已对你的问题做了回复，请查看这边： https://e2e.ti.com/support/wireless_connectivity/proprietary_sub_1_ghz_simpliciti/f/156/t/588918