摘要:
A bandpass filter consisting of two dielectric resonators coupled with each other, the bandpass filter comprising: a filter body including an intermediate grounding layer, a first pair of dielectric layers, a pair of inductor layers, a second pair of dielectric layers, a pair of outer grounding electrode layers and a pair of protecting layers, one of each pair being laminated on an upper surface of the intermediate grounding electrode layer in the above order to constitute a first resonator and the other of each pair being laminated on a bottom surface of the intermediate grounding electrode layer in the above order to constitute a second resonator; and a plurality of outer connecting terminals provided on outer surfaces of said filter body and connected to predetermined layers among the intermediate grounding electrode layer, inductor layers and outer grounding electrode layers; wherein the intermediate grounding electrode layer has a coupling portion for magnetically coupling one inductor layer formed on the upper surface thereof with the other inductor layer formed on the bottom surface thereof.
摘要:
A high frequency switch module includes a laminated circuit component that includes an antenna electrode connected to a single antenna, a plurality of communication electrodes connected to a plurality of high frequency communication circuits to transmit, receive, or transmit and receive plural kinds of communication signals, and a land arranged to mount a switch IC on, and a switch IC that is mounted on the laminated circuit component and includes a common terminal connected to the single antenna through the laminated circuit component, and a plurality of communication circuit terminals connected to the plurality of high frequency communication circuits through the laminated circuit component. The switch IC is provided with switch circuits between the communication circuit terminals and the common terminal, and all of the switch circuits have the same or substantially the same resistance against transmission power applied at the time of transmission.
摘要:
A composite high frequency apparatus includes a high frequency filter and a high frequency switch which have a substantially reduced size and do not require an impedance matching circuit. The apparatus includes a multilayered base having an outer surface with a plurality of diodes, an external ground electrode, an external electrode for a transmission circuit, an external electrode for a receiving circuit, an external electrode for an antenna circuit and external electrodes for control terminals located thereon. A plurality of strip lines, capacitor electrodes and an external grounding electrode are located within the multilayered base.
摘要:
An electronic component which is employed in the frequency range in the microwave band or above is mounted on a circuit board. The circuit board comprises two linear transmission line members, a ground electrode, and an electric insulating substrate provided with the transmission line members and the ground electrode on its major surface. The electronic component comprises external electrodes which are formed on its side surfaces. Holding patches which are formed on the lower surface of the electronic component are bonded to the ground electrode by solder members, thereby fixing the electronic component to the circuit board. At this time, small clearances are defined between the electronic component and the circuit board through the solder members, whereby the external electrodes are electromagnetically coupled with the transmission line members and the ground electrode through the clearances respectively. Thus, it is possible to obtain a mounting structure for an electronic component, which can suppress development of unnecessary inductance components.
摘要:
In a variable capacitance module capable of achieving necessary variable capacitance ranges, a variable capacitance circuit includes a variable capacitance element and fixed capacitance elements. A first variable capacitance element and a first fixed capacitance element are connected in series, and the series circuit thereof and a second fixed capacitance element are connected in parallel. Accordingly, with reference to the capacitance of the second fixed capacitance element, the range of the combined capacitance of the variable capacitance circuit is provided by a step size of capacitance based on the combined capacitance of the variable capacitance element and the first fixed capacitance element. The first and second fixed capacitance elements are defined by inner-layer flat-plate electrodes in a laminated substrate, and the variable capacitance element is defined by an MEMS element mounted on a top surface of the laminated substrate.
摘要:
A power distributing and synthesizing device which comprises first to third signal terminals, first and second transmission lines and a resistor. The first signal terminal is provided at the connection portion between one end of the first transmission line and one end of the second transmission line; the second signal terminal is provided at the other end of the first transmission line; and the third signal terminal is provided at the other end of the second transmission line. The resistor is connected between the second signal terminal and the third signal terminal. LC serial resonators each comprising an inductor and a capacitor are respectively connected between the first to third signal terminals and a ground.
摘要:
The invention provides a filter, comprising: at least one inductance device, at least one resonator, and at least one switching device. The inductance device may be connected in parallel with said switching device, and the resonator may be connected in series with the switching device. The above filter is small in size that is capable of functioning for high-frequency signals of plural frequency bands which are relatively adjacent to each other.
摘要:
A filter 10 (30) includes a laminate body 11 (31), PIN diodes PD1 and PD2 of switching elements and choke coils CC1-CC2 are mounted on a top surface or a principal face of the laminate body 11, and six external electrodes Ta-Tf extend on a side surface from the top surface to the bottom surface of the laminate body 11 (31). Three external electrodes Ta-Tc among the external electrodes Ta-Tf are formed on one side surface of the laminate body 11 (31), and three other external electrodes Td-Tf are formed on the opposing side surface of the laminate body laminate body 11 (31). The external electrode Ta is an input terminal, the external electrodes Tb and Te are control terminals for controlling a voltage supplied to the PIN diode PD, the external electrode Tc is an output terminal, and the external electrodes Td and Tf are ground terminals.
摘要:
The invention provides a high-frequency composite unit, wherein: a two-terminal switch constituting a transmission section, an LC filter, and a notch filter are connected between a first terminal and a second terminal; and said two-terminal switch, said LC filter, and said notch filter are integrated into a layered structure in which a plurality of dielectric layers are stacked. The above high-frequency composite unit has high performance, which can handle high-frequency signals of multiple frequency bands that are relatively adjacent.
摘要:
A composite high frequency apparatus includes a high frequency filter and a high frequency switch which have a substantially reduced size and do not require an impedance matching circuit. The apparatus includes a multilayered base having an outer surface with a plurality of diodes, an external ground electrode, an external electrode for a transmission circuit, an external electrode for a receiving circuit, an external electrode for an antenna circuit and external electrodes for control terminals located thereon. A plurality of strip lines, capacitor electrodes and an external grounding electrode are located within the multilayered base.