Radio communication equipment

A radio communication device composed of an antenna which performs communication corresponding to individual signals in at least two high and low frequency bands including a first frequency band and a second frequency band sufficiently low as compared with said first frequency band, said device comprising:

• a first integrated circuit with a communication function in said first frequency band;
• a first conductive object;
• a second integrated circuit with a communication function in said second frequency band;
• a second conductive object connected between input and output terminals of said second integrated circuit;
• and
• a third conductive object of a closed loop shape connected between input and output terminals of said first integrated circuit;
• wherein
• said second conductive object is composed of a spirally wound conductive object;
• said first conductive object has one end connected to a part of said spirally wound conductive object;
• and
• said third conductive object is arranged in the vicinity of at least one of said first conductive object and said spirally wound conductive object.

A radio communication device composed of an antenna which performs communication corresponding to individual signals in at least two high and low frequency bands including a first frequency band and a second frequency band sufficiently low as compared with said first frequency band, said device comprising:

• a first integrated circuit with a communication function in said first frequency band;
• a first conductive object connected to one of input and output terminals of said first integrated circuit;
• a second integrated circuit with a communication function in said second frequency band;
• a second conductive object connected between input and output terminals of said second integrated circuit;
• and
• a third conductive object;
• wherein
• said second conductive object is composed of a spirally wound conductive object;
• said third conductive object is arranged in a manner separated a predetermined interval from, and overlapped with, a part of said spirally wound conductive object;
• and
• the other of the input and output terminals of said first integrated circuit is connected to said third conductive object.

A radio communication device composed of an antenna which performs communication corresponding to individual signals in at least two high and low frequency bands including a first frequency band and a second frequency band which is sufficiently low as compared with said first frequency band, said device comprising:

• a first integrated circuit with a communication function in said first frequency band;
• a second integrated circuit with a communication function in said second frequency band;
• a plate-like dielectric member;
• a spirally wound conductive object formed on a front surface of said plate-like dielectric member;
• a first conductive object formed on the front surface of said plate-like dielectric member, and said first conductive object having one end connected to said spirally wound conductive object;
• a second conductive object of a closed loop shape formed on the front surface of said plate-like dielectric member, and said second conductive object having opposite ends connected to said first integrated circuit;
• a third and a fourth conductive object formed on a back surface of said plate-like dielectric member;
• a different interlayer connection structure connecting the conductive objects formed on the front surface of said plate-like dielectric member and the conductive objects formed on the back surface thereof to each other;
• and
• a capacitor;
• wherein
• said first integrated circuit and said second conductive object are arranged between said first conductive object and said spirally wound conductive object;
• the width of each of winding wires which form said spirally wound conductive object is partially enlarged in the vicinity of a connection part between said first conductive object and said spirally wound conductive object, and said third conductive object is arranged in a back surface part opposing to these;
• a terminating end of said spirally wound conductive object is partially enlarged, and said fourth conductive object is arranged in a back surface part opposing to this;
• the terminating end of said spirally wound conductive object is connected to one terminal of said second integrated circuit;
• a starting end of said spirally wound conductive object is connected to the other terminal of said second integrated circuit and said fourth conductive object through said different interlayer connection structure;
• and
• said capacitor is connected between the terminals of said second integrated circuit.