徹 深沢

TL;DR: In this paper, a mobile telephone set is equipped with a main antenna 40 for communication which is connected to a wireless part 53 in an enclosure to communicate by radio waves and a looped electromagnetic antenna 10 which was connected to an IC module 51 in the enclosure to send and receive data to and from the external equipment without contacting through electromagnetic induction, the looped antenna 10 being arranged on the reverse surface and flank of the enclosure where a battery cover 21 is provided.

TL;DR: In this paper, a microstrip antenna is provided with an earth conductor 2, a parasitic conductor 7, a feeding conductor 3 which is laid between the conductors 2 and 7, and a wall-like member 5 which is arranged around an inter-conductor space demarcated by connecting the peripheral edge of the conductor 7 to that of a conductor 3 and made of a dielectric or conductive material.

TL;DR: In this paper, a multi-frequency shared antenna device is provided with a simple structure for being easily manufactured, and a frequency for matching the impedance of the radiation plate and the impedance mismatch of the RF circuit is set by the bias voltage.

TL;DR: In this article, a portable radio terminal is provided with: a ground conductor 1 which is a ground of a circuit board, arranged with an output device, a ground conductor 2 which is an output ground of circuit board arranged with a radio circuit including an antenna element and an input device; a linear conductor bundle 7 connecting the ground conductors 1 and 2; a metallic inner rail 4 installed on the front side of the ground conductor 2 and engaged with the outer rail 3; and a load 5 that is provided either between the groundconductor 2 and the inner rail 3 to electr

TL;DR: In this paper, the problem of matching two arbitrary frequencies by connecting a serial resonance circuit serially with a load when it is watched from an input terminal and connecting a parallel resonance circuit in parallel with the load and the entire serial circuit was solved.