| 摘要 |
<p>PURPOSE: To improve equipment and a method for cellular and cordless radio telephone mobile communications. CONSTITUTION: This equipment is composed of; a receiving part 301 having an RF circuit with an antenna 382, an RF/IF converting circuit, a communication path with 1st filters 333 and 328 for carrying signals within 1st (cellular) and 2nd (cordless) frequency ranges higher than the 1st by a multiple of an integer, and a circuit 335 for blocking the signals within the 2nd frequency range wherein the block circuit is switched to the communication path with the 1st filter; a 1st transmission part 302 having a signal divider circuit while mutually connecting the antenna to the RF/IF converting circuit for carrying signals within the 1st frequency range; and a 2nd transmission part 303 which is connected to the antenna so as to receive signals from the signal divider circuit and which has a signal amplifier circuit 361 for increasing the frequency received from the signal divider circuit upto the band within the 2nd frequency band, thereby the receiving part and the 1st and 2nd transmission parts share mixers/IF devices 322-326.</p> |
