High-frequency switch module

一种高频开关、开关的技术，应用在阻抗网络、波导型器件、电气元件等方向，能够解决收发系统影响、GaAs开关阻带衰减小等问题

Inactive Publication Date: 2005-04-20
TAIYO YUDEN KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, GaAs switches have less stopband attenuation
The problem with high-frequency switching modules equipped with GaAs switches is that a transceiving system in a selected state may be affected by another transceiving system

Method used

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Embodiment Construction

[0034] Embodiments of the present invention will be described below with reference to the drawings.

[0035] First, the first embodiment will be described. This embodiment adopts a switch made of gallium arsenide (GaAs) (hereinafter referred to as a GaAs switch), which has low power consumption. Compared with PIN diode switches, GaAs switches can significantly reduce current consumption. GaAs switches also reduce the size and thickness of the entire high-frequency switching module, since special circuits are no longer required to reduce power consumption. According to the present embodiment, the transmission system is equipped with a low-pass filter (hereinafter abbreviated as LPF), and the input and output terminals of the LPF have inductance. Here, the high-frequency switch module is configured such that the inductance on the input and output terminals is higher than the inductance between the input and output terminals. Thus, in the stopband of the LPF, the input impedan...

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Abstract

The invention provides a high-frequency switch module with low power consumption, small size and thin thickness. The high-frequency switch module can also obtain sufficient stopband attenuation and obtain suitable characteristics. The high-frequency switch module includes a GaAs switch made of lower-power gallium arsenide (GaAs), and a low-pass filter for each transmit system. The low-pass filter includes a first inductor and a capacitor connected in series, and second and third inductors respectively connected to the input and output terminals, the second and third inductors having an inductance greater than that of the first inductor.

Description

technical field [0001] The present invention generally relates to high-frequency switch modules, and more particularly to high-frequency switch modules for front-end modules of multiple communication systems. Background technique [0002] In recent years, for example, mobile phones have been improved in terms of functions and services. As an example, a mobile phone capable of using a plurality of communication systems has been proposed. [0003] Communication devices typified by the above-mentioned mobile phones are required to establish communications in different frequency bands. A recently developed tri-band mobile phone is capable of communicating with three transceiving systems such as a GSM (Global Communications for Mobile) system, a DCS (Digital Communications System) system, and a PCS (Personal Communications Services) system. [0004] However, the above-mentioned GSM, DCS, and PCS systems use different frequency bands; thus, mobile phones are equipped with switch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/44H04B1/40
CPCH04B1/006H04B1/48
Inventor 田坂直之
Owner TAIYO YUDEN KK
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