http://www.digi.com/support/kbase/kbaseresultdetl?id=2146
對point-to-point operation
天線6dBi 允許4W,天線9dBi 允許6.35W, ...
九叔引用的計算:
Maximum transmitter power versus largest antenna table for PTP | ||
Transmitter RF power | Antenna GainM | EIRP in watts |
30dBm 1W | 6dBi | 3.98 |
29dBm 800mW | 9dBi | 6.35 |
28dBm 630mW | 12dBi | 10.14 |
27dBm 500mW | 15dBi | 15.81 |
26dBm 398mW | 18dBi | 25.23 |
25dBm 316mW | 21dBi | 40.28 |
24dBm 250mW | 24dBi | 62.79 |
23dBm 200mW | 27dBi | 100.2 |
最後的100W是把27dBi天線最強輻射方向的輻射強度算到整個球麵得到的功率,對嗎?