Front end module and high-frequency functional module

a technology of functional modules and front end modules, applied in the direction of basic electric elements, electrical apparatus, semiconductor devices, etc., can solve the problems of increasing the number of components, difficult to unify multiplexing systems, and complicated circuits, so as to reduce the size and weight, the effect of higher combination and integration of components

Inactive Publication Date: 2004-12-02
SNAPTRACK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] It is a first object of the invention to provide a front end module that is operable in the time division multiple access system and the code division multiple access system and easily achieves a reduction in size and weight, and higher combination and integration of components.
[0011] It is a second object of the invention to provide a high frequency functional module that includes a duplexer for separating transmission signals and reception signals from each other and easily achieves a reduction in size and weight, and higher combination and integration of components.

Problems solved by technology

In the current situation, however, it is difficult to unify the multiplexing systems.
If new functions as described above are added to the cellular phones, the circuits are more complicated and the number of components increases.
Consequently, it is impossible to separate transmission signals and reception signals from each other in a time division manner through the use of a high frequency switch in the W-CDMA system.
However, the coaxial-dielectric duplexers are large and heavy so that they are not suitable for reducing the size and weight of the front end modules.
In addition, these duplexers are made of different materials and have a different configuration from the conventional front end modules, so that they are not suitable for combination and integration with the front end modules, either.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0072] [First Embodiment]

[0073] A front end module of a first embodiment of the invention will now be described. The front end module of the embodiment is a module that is operable in the GSM as a time division multiple access system and the W-CDMA as a code division multiple access system and that processes transmission signals and reception signals of these systems. The frequency band of transmission signals of the GSM is 880 to 915 MHz. The frequency band of reception signals of the GSM is 925 to 960 MHz. The frequency band of transmission signals of the W-CDMA is 1920 to 1990 MHz. The frequency band of reception signals of the W-CDMA is 2110 to 2180 MHz.

[0074] Reference is now made to FIG. 1 to describe an example of a high frequency circuit of a cellular phone including the front end module of the embodiment. The high frequency circuit of FIG. 1 comprises an antenna 1, the front end module 2A of the embodiment connected to the antenna 1, and an integrated circuit 3A that mainly...

second embodiment

[0139] [Second Embodiment]

[0140] A front end module of a second embodiment of the invention will now be described. The front end module of the embodiment is a module that is operable in the GSM as a time division multiple access system, the DCS as a time division multiple access system, and the W-CDMA as a code division multiple access system and that processes transmission signals and reception signals of these systems. The frequency band of transmission signals of the DCS is 1710 to 1785 MHz. The frequency band of reception signals of the DCS is 1805 to 1880 MHz. The frequency band of transmission signals and the frequency band of reception signals of the GSM and the frequency band of transmission signals and the frequency band of reception signals of the W-CDMA are the same as those of the first embodiment.

[0141] Reference is now made to FIG. 16 to describe an example of a high frequency circuit of a cellular phone including the front end module of the second embodiment. The high...

third embodiment

[0177] [Third Embodiment]

[0178] A front end module of a third embodiment of the invention will now be described. The front end module of the third embodiment is a module that is operable in the GSM as a time division multiple access system, the DCS as a time division multiple access system, the W-CDMA as a code division multiple access system, and the narrow-band code division multiple access system (hereinafter called the N-CDMA) as a code division multiple access system, and that performs processing of transmission signals and reception signals of these systems. The frequency band of transmission signals of the N-CDMA is 824 to 849 MHz. The frequency band of reception signals of the N-CDMA is 869 to 894 MHz. The frequency band of transmission signals and the frequency band of reception signals of the GSM and the frequency band of transmission signals and the frequency band of reception signals of the W-CDMA are the same as those of the first embodiment. The frequency band of trans...

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PUM

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Abstract

A front end module comprises a diplexer, a high frequency switch and a duplexer. The diplexer has a first port connected to an antenna, a second port for receiving and outputting GSM signals, and a third port for receiving and outputting W-CDMA signals. The high frequency switch is connected to the second port and separates GSM transmission signals and reception signals from each other. The duplexer is connected to the third port and separates W-CDMA transmission signals and reception signals from each other. The duplexer includes two acoustic wave elements. A single multi-layer substrate for integration is used to integrate the diplexer, the high frequency switch and the duplexer.

Description

[0001] 1. Field of the Invention[0002] The present invention relates to a front end module and a high frequency functional module for processing transmission signals and reception signals in a communications device such as a cellular phone.[0003] 2. Description of the Related Art[0004] Third-generation cellular phones have been introduced and it is getting required that such phones have not only the speech function but also the high-speed data communications function. Therefore, in various countries, adoption of a variety of multiplexing systems for achieving high-speed data communications is considered. In the current situation, however, it is difficult to unify the multiplexing systems. Consequently, it is required that the cellular phones be provided for multiple modes (systems) and multiple bands.[0005] In Europe, for example, dual-band cellular phones operable under the global system for mobile communications (GSM) and the digital cellular system (DCS) have been used in the ent...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04B1/40H04B7/26
CPCH04B1/406H04B7/2618H01L2223/6677H01L2224/16227H01L2224/16235H01L2924/15192H01L2924/15311H01L2924/15313H01L2924/16251
Inventor NAKAI, SHINYA
Owner SNAPTRACK
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