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:
A composite high-frequency component is designed to occupy a smaller area and a smaller volume when mounted in an apparatus, can be located in the apparatus with improved flexibility, and is able to operate without an impedance matching circuit. The composite high-frequency component includes a multilayer substrate, diodes constituting a high-frequency switch component, and a circuit base. External terminals for connection to a transmitting circuit, a receiving circuit and an antenna, external terminals for control and an external terminal for connection to ground potential are formed on an outer surface of the multilayer substrate. Strip lines and capacitors constituting the high-frequency switch and strip lines and capacitors constituting a low-pass filter circuit are formed in the multilayer substrate.
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:
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:
A compact high frequency hybrid switch suitably operated in a diversity-type antenna system. A high frequency hybrid switch is comprised of: first to fourth ports; a first high frequency switch circuit for switching a connection established between the first port and the third port; and a second high frequency switch circuit for selecting one from two connections respectively established between the first port and the fourth port, and between the second port and the fourth port. The first and second high frequency switch circuits include respective series and parallel arrangements of diodes, capacitors and distributed constant signal lines which reduce the size and improve the reliability of the switch.
摘要:
A high-frequency module includes a diplexer, first and second high-frequency switches, a SAW duplexer, first and second LC filters functioning as first and second filters, and an SAW filter functioning as a third filter, the module defines a unit that integrates front-end sections of first to third communication systems, a digital cellular system (1.8 GHz band), a personal communication service (1.9 GHz band) and a global system for mobile communications (900 MHz band).
摘要:
The invention provides a composite high frequency component constituting a part of a microwave circuit having plural signal paths corresponding to their respective frequencies, comprising: a diplexer for coupling transmitting signals from the plural signal paths for transmission and distributing receiving signals into said plural signal paths for reception; plural high frequency switches for separating the plural signal paths into a transmission section and a reception section, respectively; plural filters introduced in the signal paths; said diplexer, said high frequency switch, and said filters being integrated into a ceramic multi-layer substrate formed by lamination of plural ceramic sheet layers. According to the above described composite high frequency component, the diplexer, the high frequency switches, and the filters which constitute the composite high frequency component are integrated into the ceramic multi-layer substrate formed by lamination of plural ceramic sheet layers. Thus, the matching and adjustment between the diplexer and the high frequency switches can be easily performed. It is unnecessary to provide a matching circuit for matching and adjusting the diplexer and the high frequency switches, and moreover, the high frequency switches and the filters.
摘要:
A composite high frequency component and a mobile communication apparatus incorporating the same which needs no matching circuits and can easily be miniaturized. The composite high frequency component is constituted of a diplexer, high frequency switches, high frequency filters, and surface acoustic wave filters. The diplexer is formed by first inductors and first capacitors. The high frequency switches are formed by diodes, second inductors, and second capacitors. The high frequency filters are formed by third inductors and third capacitors.
摘要:
A high frequency switching component for being connected to a transmission circuit, a reception circuit, and an antenna to be used for switching to either a state in which the transmission circuit is connected to the antenna, or a state in which the reception circuit is connected to the antenna, comprising: a multilayer circuit board, on which there is formed a circuit including: a transmission circuit terminal to be connected to the transmission circuit; a reception circuit terminal to be connected to the reception circuit; an antenna terminal to be connected to be the antenna; a ground terminal; a first diode whose anode is connected to the transmission circuit terminal and the cathode thereof is connected to the antenna terminal; a second diode whose anode is connected to the reception circuit terminal and the cathode thereof is connected to the ground terminal; a signal line for connecting the transmission circuit terminal, the reception circuit terminal, and the antenna terminal via the first diode; and an inductor or an LC filter disposed between the signal line and the ground terminal to reduce noise on the signal line; in which the transmission circuit terminal, the reception circuit terminal, the antenna terminal, the ground terminal, the first diode, and the second diode are disposed on a surface of the multilayer circuit board; at least a part of the signal line being disposed inside the multilayer circuit board; and the inductor being disposed either inside or on the surface of the multilayer circuit board.