High frequency switch, two-band type high frequency switch, three-band type high frequency switch, and mobile communication equipment

A high frequency switch, comprising:

• a laminated component having a plurality of dielectrics laminated therein;
• a transmitting terminal, a receiving terminal, an antenna terminal, a control terminal, a ground terminal, and an electrode pattern for connecting a part, which are provided on the surface of said laminated component;
• a first diode having an anode electrically connected to said transmitting terminal and having a cathode electrically connected to said antenna terminal;
• and
• a second diode having an anode connected through a transmission terminal of {fraction (1/4)} wavelength to the antenna terminal which is electrically connected to said receiving terminal, and having the side of a cathode grounded, said first and second diodes being mounted on the surface of said laminated component,
• wherein said first and second diodes have a tradeoff relationship between ON resistance thereof and capacitance between said anode and said cathode, and
• the ON resistance of the first diode is lower than the ON resistance of the second diode, and the capacitance of the second diode in the OFF state is smaller than the capacitance of the first diode in the OFF state.

A three-band type of high frequency switch, comprising:

• a first high frequency switch for use in a first frequency band;
• a second high frequency switch for use in a second frequency band higher than the first frequency band;
• a third high frequency switch for use in a third frequency band higher than the first frequency band;
• a divider for sharing the same antenna among said first high frequency switch, said second high frequency switch, and said third high frequency switch, by multiplexing and demultiplexing said first frequency band, said second frequency band and said third frequency band, the antenna terminal of said first high frequency switch and the antenna terminal of said second high frequency switch being electrically connected to each other,
• wherein the high frequency switch according to any of claims from 1 to 5 is used for said first high frequency switch and said second high frequency switch, and
• said third high frequency switch has a third diode having a cathode connected to between said antenna terminal and a node of the cathode of said first diode and said transmission line and having an anode connected to a second receiving terminal, and a second control terminal connected to between said third diode and said second receiving terminal,
• said third high frequency switch using the transmitting terminal of said first high frequency switch as a second transmitting terminal thereof, and said third high frequency switch operating on the receiving side, by using said second diode of said second high frequency switch.