Sharp Kabushiki Kaisha Corporation

Yoshinori Motouchi

Naoki Takahashi

Atsushi Yamada

Yoshihisa Amano

Kazuhiko Shirakawa

Nobuyuki Matsumoto

Configuration of a connection between an even-harmonic mixer and a filter is simplified, thereby enabling size reduction. An even-harmonic mixer and a high-frequency bandpass filter are connected to each other via a transmission line, thereby forming a filter-integrated even-harmonic mixer. The length of the transmission line is set so that impedance on the transmission line side as viewed from a connection point between the even-harmonic mixer and the transmission line is approximately 0 for a frequency fof a local oscillation signal. This allows elimination of an open stub which is used in a conventional even-harmonic mixer and of which the line length to provide equivalent grounding for the frequency fis about 1 mm. Thus, the connection portion between the even-harmonic mixer and the high-frequency bandpass filter is simplified and a compact circuit layout for the filter-integrated even-harmonic mixer is obtainable.

Filter-integrated even-harmonic mixer and hi-frequency radio communication device using the same

An amplifier GaAs MMIC for microwave band applications includes a ground electrodehaving a via hole groupcomposed of three via holesfilled with plated metalsthat are formed adjacently. The interaction thereby generates high frequency electromagnetic bonding, which reduces the ground inductance. According to the MMIC, the ground inductance of the via hole may be reduced while decrease of a strength and increase of a size being restrained.

Semiconductor device with via hole group generating high frequency electromagnetic bonding, manufacturing method thereof, and monolithic microwave integrated circuit

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Tenri, Japan

Yoshinori Motouchi