| 摘要 |
PROBLEM TO BE SOLVED: To provide a portable telephone set provided with an antenna which reduces the influence of radio waves on a human body and suppresses a polarization loss due to the difference of planes of polarization of incoming radio waves even in the case of an actual speech communication. SOLUTION: This portable telephone set has the first antenna part 16 which has a radio part inside a housing 11 having a microphone 13 and a speaker 12 and is fixedly arranged at the upper part of the housing 11 and where the first antenna element that is connected to the radio part and has the electrical length of about 1/4 wavelength in an operation frequency, and a plate-shaped antenna part 17 to be excited which is arranged slidably on the rear side face of the housing 11, crossing almost orthogonally with respect to the arrangement direction of the microphone 13 and the speaker 12 and has internally the second antenna element having the electrical length of about 1/2 wavelength, and when the second antenna element is pulled out, the second antenna element is excited by being subjected to capacitance coupling with the first antenna element. |
