Portable testing device using an antenna.

摘要

The invention discloses an antenna coupler (20) comprising: a placement member (35) which places a portable radio terminal (1) which is a testing object; a coupling antenna (25) which is disposed so as to be electromagnetically coupled to an antenna (1a) of the portable radio terminal (1) which is a testing object, placed on the placement member (35); and connecting means (32) electrically connected to the coupling antenna (25). The coupling antenna (25) is formed as a self-complementary antenna having a predetermined impedance which is substantially constant in a predetermined usable frequency range in accordance with sizes of respective first and second antenna elements (27, 28).