Composite high frequency component and mobile communication device including the same

A composite high frequency component constituting a part of a microwave circuit having plural signal paths corresponding to their respective frequencies, comprising:

• a diplexer for coupling transmitting signals from the plural signal paths for transmission and distributing receiving signals into said plural signal paths for reception;
• plural high frequency switches for separating the plural signal paths into a transmission section and a reception section, respectively;
• plural filters introduced in the signal paths;
• each of said plural high frequency switches including a first switching element connected to the transmission section side and a second switching element connected to the reception section side;
• and
• said plural high frequency switches being on-off controllable with a first common controlling power supply connected to the plural high frequency switches on the transmission section sides thereof.

A composite high frequency component constituting a part of a microwave circuit having plural signal paths corresponding to their respective frequencies, comprising:

• a diplexer for coupling transmitting signals from the plural signal paths for transmission and distributing receiving signals into said plural signal paths for reception;
• plural high frequency switches for separating the plural signal paths into a transmission section and a reception section, respectively;
• plural filters introduced in the signal paths;
• each of said plural high frequency switches including a first switching element connected to the transmission section side and a second switching element connected to the reception section side;
• said plural high frequency switches being on-off controllable with a first common controlling power supply connected to the plural high frequency switches on the transmission section sides thereof and a second common controlling power supply connected to the high frequency switches on the reception sides thereof.

A composite high frequency component provided with a front end portion so formed as to correspond to first and second communication systems operative at adjacent frequencies, and a third communication system operative at a frequency different from those of the first and second communication systems, comprising:

• a diplexer for coupling transmitting signals from said first through third communication systems in the case of transmission and for distributing receiving signals to said first through third communication systems in the case of reception;
• a first high frequency switch for separating the transmission section of said first and second communication systems and the reception section of the first and second communication systems from each other;
• a second high frequency switch for separating the reception section of the first communication system and the reception section of the second communication system from each other;
• a third high frequency switch for separating the transmission section of said third communication system and the reception section thereof from each other;
• a first filter for passing transmission-reception signals of said first and second communication systems;
• and
• a second filter for passing transmission-reception signals of said third communication systems;
• and
• the composite high frequency component being integrated into a ceramic multi-layer substrate formed by lamination of plural ceramic sheet layers.