| 摘要 |
<p>A dual band transmitter includes a power amplifier (3) having an output and a stub (6) having a first and a second end and a switch (65) which is switchable between a first and a second state. The first end (61) of the stub is coupled to the output of the power amplifier and the second end (62) of the stub is coupled to the switch, whereby the second end of the stub may be substantially closed or opened in dependence upon the state of the switch.</p> |
