专利名称：STANDARD FREQUENCY SUPPLY SYSTEM 发明人：TAKAHASHI KENZO,JUMONJI HIROMICHI 申请号：JP8802879
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申请日：19790713jjmy
eico公开号：JPS5939930B2
公开日：
19840927
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tnc摘要：PURPOSE:To ignore the Doppler shift by dividing the standard frequency into two parts and then giving a fixed delay to one of the two parts to transmit it via the stationary satellite, thus realizing the supply of the standard frequency of the high stability, high accuracy and high quality each. CONSTITUTION:Oscillation source 1 of frequency f0 in the central station is divided 2 into two parts. One of the two parts receives the delay (amount tau0) through delaying circuit 4, and thus phas phi1 and phi2 of each input at input terminals 14 and 15 of multiple converter 6 feature phi1=phi0 and phi2=phi0-omega0tau0 each. Then the multiple conversion is given to the two inputs of converter 6, and then the inputs receive conversion 8 and isolation again via the satellite propagation route of radio transmitter/receiver 7, stationary satellite 10 and radio transmitter/receiver 9 each. Output 16 is supplied to pha comparator 11 and pha control circuit 12 after receiving delay tau0 identical to circuit 4 via delaying circuit 5, and thus the steady standard frequency is obtained at terminal 13. In such ca, the variation amplitude is suppresd like curve 22 (conventionally curve 21) for pha fluctuation DELTAphi caud by the Doppler shift. And the more intensively the variation amplitude receives the suppression the smaller the time tau0 (correction time interval).
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