Patent ID: 7379751

Claim:
A multi-band transceiver, comprising: a first shared device (Dup 1 ) for performing transmission and reception of a first communication system; a second shared device (Dup 2 ) for performing transmission and reception of a second communication system; a first amplifier (PM 1 ) for amplifying a transmitted signal of the first communication system; a second amplifier (PM 2 ) for amplifying a transmitted signal of the second communication system; and a frequency branching circuit (Dip) for branching requency bands of the first and second communication systems, wherein a first transmitting filter (S 1 ) that comprises said first shared device (Dup 1 ), a first receiving filter (S 2 ) that forms said first shared device (Dup 1 ), a second transmitting filter (F 1 ) that comprises said second shared device (Dup 2 ), a second receiving filter (F 2 ) that forms said second shared device (Dup 2 ), said first amplifier (PM 1 ), and said second amplifier (PM 2 ) are mounted on the same substrate, and wherein the distance between said first transmitting filter (S 1 )/first receiving filter (S 2 ) and a first amplifier circuit (P 1 )/second amplifier circuit (P 2 ) is made larger than the distance between said second transmitting filter (F 1 )/second receiving filter (F 2 ) and said first amplifier circuit (P 1 )/second amplifier circuit (P 2 ).