| 摘要 |
A radiotelephone having a radio-frequency transmitter is proposed, the complex output impedance of which is automatically matched to the base impedance of the transmitting antenna (39) in dependence on the reflection coefficient. For the matching, an adjustable matching network (19) is used, the capacitive or inductive adjusting elements (35, 36) of which are influenced by control voltages (URB, URP), the value of which depends on the phase difference and on the difference in amount between the radio-frequency power emitted by the transmitter output amplifier and the reflected power. <IMAGE> |
