Matsushita Electric Industrial Co., Ltd.

Shoichi Kitazawa

Toshio Ishizaki

Toru Yamada

Hideaki Nakakubo

Hiroshi Kagata

Tatsuya Inoue

Yoshitaka Nagatomi

Masaharu Tanaka

Naoki Yuda

Kaoru Ishida

Koichi Ogawa

Takehiko Yamakawa

Hiroshi Kushitani

Makoto Fujikawa

Hideyuki Miyake

Tomoyuki Iwasaki

Ikuo Awai

Tadanori Fujisawa

A high frequency switch, has a transmitting terminal, a receiving terminal, an antenna terminal, a first diode having an anode electrically connected to the transmitting terminal and a cathode electrically connected to the antenna terminal, a second diode having an anode connected through a transmission line of &#xbc; wavelength to the antenna terminal which is electrically connected to the receiving terminal, and having the side of a cathode grounded, and a control terminal provided to a node between the transmitting terminal and the first anode. The first and second diodes have a tradeoff relationship between ON resistance thereof and capacitance between the anode and the cathode, and the ON resistance of the first diode is lower than the ON resistance of the second diode, and the capacitance of the second diode in the OFF state is smaller than the capacitance of the first diode in the OFF state.

High frequency switch, two-band type high frequency switch, three-band type high frequency switch, and mobile communication equipment

A multilayer electronic component has a multilayered product laminating a plurality of dielectric sheets as one piece,

Multilayer electronic component and communication apparatus and method

By using a method for manufacturing a dielectric laminated device, an opening is formed on a first dielectric sheet, a strip line and an input and output line including an input and output electrode are formed by burying electrode materials in said opening, the first dielectric sheet is laminated with the second and third dielectric sheets disposed above and below respectively to form a laminate, a first and second shield electrodes and a ground electrode are formed, an end of the strip line is connected to the ground electrode, the first shield electrode and the second shield electrode are mutually connected through the ground electrode, and the input and output electrode is exposed along the line direction of the strip line. By this constitution of the above dielectric laminated device, the mounting reliability of the dielectric laminated device can be further increased.

Method for manufacturing dielectric laminated device

Dielectric laminated device including a buried electric conductive member to form a strip line and its method of manufacture

A notch filter made up from laminated dielectric, which attenuates a specific frequency of a signal to be transmitted, comprises two terminals for input or output a signal to be transmitted, a line connected between those terminals, two resonators each having one end connected to ground and an other end, two first coupling capacitors, and a second coupling capacitor. Each end of the line is connected to the other end of the resonator through the first capacitor. The second capacitor couples said two resonators each other.

Laminated notch filter and cellular phone using the same

High frequency switch and mobile communication equipment

Method for forming a dielectric laminated device

A small multilayer filter, in which a phase shifter may be constituted without increasing overall size of the filter. The overall size may be reduced without deteriorating the characteristics. Above the open end of a plurality of strip lines A provided on a dielectric layer a coupling sector A of input/output pattern is placed to face it with a dielectric layer interposed. An inductance L L is formed by connecting a side electrode A, B with a continuity sector B of input/output pattern; and said side electrode A, B with an input electrode A, output electrode B, respectively, by means of an electrode pattern A.

Multilayer filter having varied dielectric constant regions

A small multilayer filter, in which a phase shifter may be constituted without increasing overall size of the filter. The overall size may be reduced without deteriorating the characteristics. Above the open end of a plurality of strip lines A provided on a dielectric layer , a coupling sector A of input/output pattern is placed to face it with a dielectric layer interposed. An inductance L , L is formed by connecting a side electrode A, B with a continuity sector B of input/output pattern; and said side electrode A, B with an input electrode A, output electrode B, respectively, by means of an electrode pattern A.

Multilayer filter with electrode patterns connected on different side surfaces to side electrodes and input/output electrodes

By using a method for manufacturing a dielectric laminated. device, an opening is formed on a first dielectric sheet, a strip line and an input and output line including an input and output electrode are formed by burying electrode materials in said opening, the first dielectric sheet is laminated with the second and third dielectric sheets disposed above and below respectively to form a laminate, a first and second shield electrodes and a ground electrode are formed, an end of the strip line is connected to the ground electrode, the first shield electrode and the second shield electrode are mutually connected through the ground electrode, and the input and output electrode is exposed along the line direction of the strip line. By this constitution of the above dielectric laminated device, the mounting reliability of the dielectric laminated device can be further increased.

Dielectric laminated device and its manufacturing method

The present invention relates to a balanced dielectric filter used in high-frequency circuits, such as those used for radio apparatuses, and provides a balanced dielectric filter having balanced input/output terminals. Namely, the balanced dielectric filter comprises two resonators, each comprising plural strip-line resonating elements, disposed in parallel and mutually coupled electro-magnetically, and input and output terminals coupled to each resonator so as to function as a pair of balanced input terminals and a pair of balanced output terminals, wherein the two resonators are located in a ceramic dielectric to face each other and to be mirror images of each other. The resonating element is a quarter-wavelength resonating element, the end of the strip line thereof is grounded. The strip lines and coupling electrodes are arranged among ceramic layers, whereby the filter is integrated into a ceramic-multilayered structure.

Balanced dielectric filter

A small multilayer filter, in which a phase shifter may be constituted without increasing overall size of the filter. The overall size may be reduced without deteriorating the characteristics. Above the open end of a plurality of strip lines,A provided on a dielectric layer,a coupling sector,A of input/output pattern is placed to face it with a dielectric layer,interposed. An inductance L,L,is formed by connecting a side electrode,A,,B with a continuity sector,B of input/output pattern; and said side electrode,A,,B with an input electrode,A, output electrode,B, respectively, by means of an electrode pattern,A.

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Nishinomiya, Japan

Shoichi Kitazawa