Pi matching circuit：
Sigfox certification Item：
|
Conductive Test |
920.1375MHz |
921.3875MHz |
922.6625MHz |
|
TX Power |
15.7dBm |
15.3dBm |
14.5dBm |
|
TX Current |
270mA |
260mA |
240mA |
|
Frequency Offset |
-233Hz |
-267Hz |
-233Hz |
|
2nd Harmonic |
-34.9dBm |
-36.1dBm |
-37.1dBm |
|
3rd Harmonic |
-63.1dBm |
-63.9dBm |
-64.9dBm |
|
4th Harmonic |
-59.7dBm |
-60.4dBm |
-60.9dBm |
|
5th Harmonic |
-60.3dBm |
-62.3dBm |
-65.3dBm |
|
6th Harmonic |
-68.3dBm |
-68.5dBm |
-70.1dBm |
|
7th Harmonic |
-- |
-- |
-- |
|
8th Harmonic |
-63.2dBm |
-63.9dBm |
-65.8dBm |
|
9th Harmonic |
-- |
-- |
-- |
|
10th Harmonic |
-- |
-- |
-- |
2019.8.30 Sigfox certification
原文：https://www.cnblogs.com/huangbaobaoi/p/11436751.html