Variable type antenna matching circuit
First Claim
Patent Images
1. A variable type antenna matching circuit comprising:
- an antenna;
shape change detecting means for detecting a change in a shape of a housing of a portable terminal;
transmission/reception radio means for transmitting and receiving signals; and
variable type antenna matching means for changing an input impedance between said antenna and said transmission/reception radio means in accordance with an output signal from said shape change detecting means;
wherein said shape change detecting means further comprising speech communication state detecting means for detecting whether or not speech communication is being performed, and said variable type antenna matching means changes an input impedance between said antenna and said transmission/reception radio means in accordance with an output from the speech communication state detecting means when said shape change detecting means detects a change of the housing shape.
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Abstract
A variable type antenna matching circuit includes an antenna, shape change detecting section, transmission/reception radio section, and variable type antenna matching section. The shape change detecting section detects a change in the shape of the housing of a portable terminal. The transmission/reception radio section transmits and receives signals. The variable type antenna matching section changes the input impedance between the antenna and the transmission/reception radio section in accordance with an output signal from the shape change detecting section.
41 Citations
6 Claims
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1. A variable type antenna matching circuit comprising:
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an antenna;
shape change detecting means for detecting a change in a shape of a housing of a portable terminal;
transmission/reception radio means for transmitting and receiving signals; and
variable type antenna matching means for changing an input impedance between said antenna and said transmission/reception radio means in accordance with an output signal from said shape change detecting means;
wherein said shape change detecting means further comprising speech communication state detecting means for detecting whether or not speech communication is being performed, and said variable type antenna matching means changes an input impedance between said antenna and said transmission/reception radio means in accordance with an output from the speech communication state detecting means when said shape change detecting means detects a change of the housing shape. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification