| 摘要 |
PROBLEM TO BE SOLVED: To provide a GPS module for making excellent sensitivity and miniaturization compatible and a mobile device using the GPS module. SOLUTION: The GPS module includes: two LNA chips 12; a 2-feed patch antenna 11 in which the outer shape dimension of an antenna emissive surface is determined such that an output characteristic impedance becomes the conjugate complex number of the input impedance of the LNA chip 12; a -3 dB directional coupler 13 in which input characteristic impedance is equal to the size of the output impedance of the LAN chip 12; wiring L1 connecting each LNA chip 12 and the -3 dB directional coupler, in which each wiring length L is turned to an electric length for offsetting the phase component of the output impedance of the LNA chip 12; and a GPS reception circuit 14 connected with the -3 dB directional coupler 13. COPYRIGHT: (C)2010,JPO&INPIT |
