Method and arrangement for matching an antenna
An antenna and matching circuit technology, applied in the field of small mobile terminals, matching methods and matching devices, can solve the problems that the matching circuit is not suitable for the transmitter, the output impedance of the power amplifier is low, the capacitor diode is not pressed, etc., and the adjustment algorithm is fast, Effects of reduced current consumption and improved average efficiency
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[0023] Figures 1 and 2 have already been explained in conjunction with the description of the prior art.
[0024] image 3 An example of an arrangement according to the invention in a transmitter of a radio device is shown in the form of a block diagram. In the transmission path of the transmitter, there are the power amplifier 310, the directional coupler 320, the reactance matching circuit 330 and the antenna 340 of the transmitter named along the direction of signal propagation. In addition to the directional coupler and the matching circuit, the control unit 350 with its coupled matching circuit belongs to the matching device.
[0025] The transmit power of the amplifier 310 can be changed by the power control signal PWC, which represents the set value of the power and is provided by the transmit power setting unit 302 . A measurement signal PWM proportional to the actual transmit power is generated in the amplifier and is used as a feedback signal to bring the transmit p...
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