Mitsuhiro Watanabe

TL;DR: In this article, a multi-band antenna switch circuit including a diplexer connected to an antenna terminal for demultiplexing signals of different passing bands was proposed.

TL;DR: In this paper, a high-frequency switch module consisting of dielectric layers having electrode patterns as the multilayered board, and a phase correction circuit disposed between the switch circuit and the surface acoustic wave filter is presented.

TL;DR: In this paper, a high-frequency switch circuit common to a plurality of frequency bands comprises a first highfrequency switch connected to first high frequency signal input and output terminals and adapted to pass transmission signals of a first or a second frequency band and block received signals of the first and second frequency bands.

TL;DR: An unbalanced-balanced multiband filter module comprising three high-frequency switches each comprising a switching element, and two unbalanced balanced bandpass filters having different transmitting frequency bands is considered in this article.

TL;DR: In this paper, a multiband high-frequency circuit comprising a first switch SPDT 1 for switching the connections of a multi-band antenna to transmitting circuits 11 bg -T, 11 a -T and receiving circuits 11bg -R, 11a -R of first and second communications systems, and a transmitting/receiving circuit BLT-TR of a third communications system, was presented.