Patent ID: 6839032

Claim:
A portable radio terminal testing apparatus comprising an antenna coupler, connecting means, and a measuring device, wherein the antenna coupler comprises: a placement member which places a portable radio terminal wherein, which is a testing object, in an unrestricted state such that the portable radio terminal can be set in an arbitrary posture; a coupling antenna which is disposed so as to be electromagnetically coupled to an antenna of the portable radio terminal, which is the testing object, placed in an arbitrary posture on the placement member, the coupling antenna comprises: first and second conductor patterns and first and second void patterns formed on one face side of a dielectric substrate so as to have a shape in which, when they are respectively rotated by a predetermined angle around a predetermined point or are respectively folded back with respect to a predetermined line, portions of the conductor patterns and portions of the void patterns can be replaced by one another, and first and second antenna elements having planar antenna structures in which first and second feeding points are formed so as to face respective base end portions of the first and second conductor patterns, so that the coupling antenna is formed as a self-complementary antenna having a predetermined impedance which is substantially constant from a lowest usable frequency to a highest usable frequency determined in accordance with sizes of the first and second antenna elements; first and second through-connection portions which connect through the first and second feeding point portions of the coupling antenna formed at one face side of the dielectric substrate to opposing portions of another face side portion of the dielectric substrate; and an impedance transformer mounted at the other face side of the dielectric substrate in a state in which one end side thereof is connected to the first and second through-connection portions, wherein the connecting means has a predetermined impedance and is configured to be able to connect the other end side of the impedance transformer of the antenna coupler and the measuring device, the impedance transformer is configured to be able to carry out impedance conversion for matching the predetermined impedance of the coupling antenna and the predetermined impedance of the connecting means under predetermined conditions, and the measuring device is configured such that predetermined tests including calling, incoming, and sensitivity for the portable radio terminal which is the testing object can be carried out via an antenna of the portable radio terminal which is the testing object electromagnetically coupled to the coupling antenna, within an arbitrary operating frequency range from a lowest usable frequency to a highest usable frequency which is determined, as an operating frequency range of the coupling antenna, in accordance with the sizes of the first and second antenna elements and limitations on feeding via the impedance transformer.