Patent EP-1659656-A3 (EP)
Title: Composite high frequency component and mobile communication apparatus including the same
Inventor: FURUTANI KOJI
IPC: H01P1/15
Filed: 1999-09-10
Abstract: A composite high frequency component (10), comprising: a first high frequency switch (12) having a first common port (P21) and first (P22), second (P23), and third (P24) communication ports, wherein: the first communication port (P22) is operable to connect to respective transmitting sections (Txdp) of first and second communication systems which operate in substantially the same frequency band, the second communication port (P23) is operable to connect to a receiving section (Rxd) of the first communication system, the third communication port (P24) is operable to connect to a receiving section (Rxp) of the second communication system, and the first high frequency switch (12) has a transfer characteristic for passing signals between the first common port (P21) and the first (P22), second (P23) and third (P24) communication ports which are in the frequency band of the first and second communication systems as a function of at least one first control signal; a second high frequency switch (13) having a second common port (P31) and fourth (P32) and fifth (P33) communication ports, wherein: the fourth communication port (P32) is operable to connect to a transmitting section (Txg) of a third communication system which operates in a different frequency band than the first and second communication systems, the fifth communication port (P33) is operable to connect to a receiving section (Rxg) of the third communication system, and the second high frequency switch (13) has a transfer characteristic for passing signals between the second common port (P31) and the fourth (P32) and fifth (P33) communication ports which are in the frequency band of the third communication system as a function of at least one second control signal; a first filter (14) having a transfer characteristic for passing signals in the frequency band of the first and second communication systems, one end (P42) of the first filter (14) being coupled to the first common port (P21) of the first high frequency switch (12); a second filter (15) having a transfer characteristic for passing signals in the frequency band of the third communication system, one end of the second filter (15) being coupled to the second common port (P31) of the second high frequency switch (13); and a diplexer (11) having a third common port (P11) and first and second input/output ports (P12; P13), wherein: the third common port (P11) is operable to at least one of receive and transmit signals from an antenna, the first input/output port (P12) is coupled to an opposite end (P41) of the first filter (14), the second input/output port (13) is coupled to an opposite end (P51) of the second filter (15), and the diplexer (11) has a transfer characteristic for passing signals: (i) between the third common port (P11) and the first input/output port (P12) which are in the frequency band of the first and second communication systems, and (ii) between the third common port (P11) and the second input/output port (P13) which are in the frequency band of the third communication system.