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Double-band antenna switcher

An antenna switch and dual-band technology, which is applied in the field of dual-band antenna switches, can solve the problems of large external dimensions of the antenna switch, and achieve the effects of cheap structure, high-efficiency filtering, and low price

Inactive Publication Date: 2004-01-07
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The final antenna switch has large external dimensions

Method used

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  • Double-band antenna switcher
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Examples

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Effect test

Embodiment Construction

[0041] An embodiment of the present invention is described below.

[0042] Figure 1 shows a dual-band antenna switch according to an embodiment of the present invention. As shown on accompanying drawing 1, the dual-band antenna switch according to the embodiment of the present invention has so-called inclined T-shaped seat 1, low-pass filter 2, conversion link 3, first antenna duplexer 4, the second antenna Sharer 5, the first diode D1 and the second diode D2. Furthermore, an antenna connection, a control signal connection TXON, a GSM transmission connection TX_GSM, a PCN transmission connection TX_PCN, a GSM reception connection RX_GSM and a PCN reception connection RX_PCN are provided.

[0043] As shown in FIG. 1 , the control signal connector TXON is connected to the input connector of the inclined T-shaped seat 1 . The first diplexer 4 is connected to another input connector of the inclined T-shaped seat. The GSM and PCN transmission connection TX_GSM or TX_PCN is conne...

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PUM

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Abstract

A multiband antenna switch is disclosed in which a matching pad (3) effects an open-circuit operation of the receiving branch at a circuit node (A) with respect to at least one higher-frequency useful-frequency band and the matching pad (3) and a filtering device (2) are tuned to one another in such a manner that, in the transmit case, a non-resistive component of an input impedance of the matching pad (3) is essentially compensated for at the circuit node (A) with respect to at least one lower-frequency useful-frequency band.

Description

technical field [0001] The present invention relates to a dual-band antenna switch which can be used to switch between the sending and receiving legs of a dual-band mobile radiotelephone. Background technique [0002] Different standards of mobile radio networks operating on different frequency bands have been developed in recent years. For example, the standard GSM900 mobile wireless network works in the 900MHz range, the standard GSM1800 mobile wireless network works in the 1800MHz range, and the standard PCS1900 mobile wireless network works in the 1900MHz range. [0003] It is in accordance with these wishes to create mobile radiotelephones or similar devices which can operate in various frequency bands, that is to say these are capable of working on different standards of mobile radio networks. [0004] Furthermore, mobile radiotelephones such as the standards GSM 900 and GSM 1800 require that the sending branch and the receiving branch be connected according to the TD...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/40H04B1/403H04B1/48
CPCH04B1/005H04B1/406H04B1/48
Inventor T·菲肯舍尔R·詹金斯
Owner QUALCOMM INC
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