The Research Of Vector Antenna Tuner

Short-wave communication with low price, strong anti-destroying ability and far communication distance, etc. Although it has the disadvantages of small communication bandwidth, signal instability, vulnerable to interference and so on,but in the current military and civilian emergency rescue, still has its advantages without replacement, is still widely in used. The antenna system has an irreplaceable role in short-wave communication. The tuning method of past manual tuning for the development of single-chip microcomputer control step by step tuning, the tuning time from a few minutes military purposes in order to avoid detection, to further reduce the tuning time, reduce power, achieve the "silent tuning" purposes. In order to make faster and more accurate tuning, tuned power lower,extract the day to signal end and the antenna input, the algorithm of orthogonal decomposition of the accurate calculation of the antenna and the antenna impedance, the reference impedance circle diagram, calculating parameter matching, a matching network in several devices, which reached the tune is the subject of this article.