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High-frequency switching circuit, high-frequency module, and wireless communications device

A technology for selecting circuits and high frequencies, applied in the direction of selection devices, radio/inductive link selection arrangements, electrical components, etc., to achieve the effect of increasing installation density, shortening the design period, and realizing commonality

Inactive Publication Date: 2005-08-31
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to design and manufacture a variety of high-frequency switches, with many disadvantages

Method used

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  • High-frequency switching circuit, high-frequency module, and wireless communications device
  • High-frequency switching circuit, high-frequency module, and wireless communications device
  • High-frequency switching circuit, high-frequency module, and wireless communications device

Examples

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Embodiment Construction

[0071]

[0072] figure 1 It is a circuit block diagram showing an example of the high-frequency selection circuit of the multi-band compatible mobile phone terminal according to the present invention.

[0073] The high-frequency selection circuit ASM1 is connected to a common antenna terminal ANT3 for GSM850 (850MHz band), GSM900 (900MHz band), DCS (1800MHz band), PCS (1900MHz band), CDMA cellular (800MHz band), UMTS (2100MHz band), a circuit for switching between these six communication systems.

[0074] The high-frequency selection circuit ASM1 has a high-frequency switch SW1 for switching TX12 (GSM850 / 900-TX), RX1 (GSM850-RX), RX2 (GSM900-RX), TXRX5 (CDMA cellular-TX / RX), and switching TX34 (DCS / PCS-TX), RX3 (DCS-RX), RX4 (PCS-RX), TXRX6 (UMTS-TX / RX) high frequency switch SW2.

[0075] The antenna-side terminal ANT1 of the high-frequency switch SW1 and the antenna-side terminal ANT2 of the high-frequency switch SW2 are both connected to the above-mentioned common anten...

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Abstract

The present invention provides a high-frequency switching circuit comprising: two or more high-frequency switches SW1 and SW2 provided correspondingly to a plurality of communication systems having mutually different frequency bands; and a control circuit DEC1 adapted to control the switching of the two or more high-frequency switches SW1 and SW2, in which a common antenna terminal ANT3 and common terminals ANT1 and ANT2 of the respective high-frequency switches SW1 and SW2 are connected via a matching circuit MAT1 having a filtering function capable of allowing passage of direct current. When one path of the high-frequency switch SW1 is turned on, the other paths of the high-frequency switch SW1 and all paths of the high-frequency switch SW2 can be turned off.

Description

technical field [0001] The invention relates to a high-frequency selection circuit especially suitable for mobile wireless terminals corresponding to multiple frequency bands, a high-frequency module containing the high-frequency selection circuit, and a wireless communication device equipped with the high-frequency module. Background technique [0002] In recent years, a mobile phone using a multi-band method in which two or more communication systems are installed in one mobile phone has been proposed. Since a mobile phone of the multi-band system can select a communication system suitable for a region and purpose of use, etc., and transmit and receive, it is expected as a mobile phone with high convenience. For example, as a plurality of communication systems with different communication bands, dual-band mobile phones of two systems, GSM (Global System for Mobile communication) and DCS (Digital Cellular System), are installed. [0003] Figure 16 It is a block diagram of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H11/34H04B1/40H04B1/44H04B1/50H04Q7/20
CPCH04B1/0057H04B1/50H04B1/44H04B1/40H04Q7/20H04B1/006H04B1/005H03H11/34
Inventor 中俣克朗二宫弘堀内雅史矶山伸治高桥彻
Owner KYOCERA CORP
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