High-frequency module

A technology of high-frequency modules and frequency bands, applied in the field of high-frequency modules, can solve problems such as communication signal attenuation, and achieve the effect of excellent splitting performance

Active Publication Date: 2015-03-04
MURATA MFG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, each filter attenuates communication signals outside its own passband

Method used

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Embodiment Construction

[0038] A high-frequency module according to an embodiment of the present invention will be described with reference to the drawings. figure 1 It is a block diagram showing the main configuration of a communication module including the high-frequency module of the present embodiment. figure 2 It is an equivalent circuit diagram of the high frequency module of this embodiment.

[0039] The high-frequency module of the present embodiment includes a triplex device 13 and baluns 321 , 322 , and 323 , which correspond to the “frequency selection unit” of the present invention. This high frequency module is used for figure 1 The receiving unit of the communication module 10 shown is integrally formed as a part of the communication module 10 by a laminated body described later and circuit elements mounted on the laminated body.

[0040] The structure of the communication module 10 including a high-frequency module will be described. The communication module 10 has an antenna com...

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Abstract

A high-frequency module enabling sufficient attenuation over a wide frequency range outside of a passband includes a triplexer including a combination of an LPF, a BPF, and HPFs arranged to demultiplex a signal input from a common terminal into a first communication signal, a second communication signal, and a third communication signal in different frequency bands, and to output the first, second, and third communication signals from individual terminals. The individual terminals of the triplexer are connected to respective baluns. The baluns are configured such that the respective passbands of the baluns overlap the respective frequency bands of the communication signals and the respective passbands of the triplexer, and the attenuation of the baluns at the attenuation poles of the triplexer is −3 dB or greater. This configuration provides high attenuation in the rebound bands of the attenuation poles.

Description

technical field [0001] The invention relates to a high-frequency module that shares a single antenna and transmits and receives high-frequency signals of multiple frequencies. Background technique [0002] Currently, with the increase in performance and miniaturization of wireless communication devices such as mobile phones, circuits that share a single antenna and transmit and receive high-frequency communication signals in different frequency bands are required. As such circuits, various triplex devices for transmitting and receiving different three kinds of communication signals have been devised. [0003] For example, in the triplex device of Patent Document 1, a low-pass filter, a band-pass filter, and a high-pass filter are connected in parallel to a common terminal, and the pass bands of the filters are different. The low-pass filter passes communication signals in the lowest frequency band among the three communication signals, the high-pass filter passes communicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H9/72H01P5/10H03H7/075H03H7/42H03H7/46H04B1/3822H04B1/40
CPCH03H7/463H03H2001/0085
Inventor 坂东知哉山口清锅谷定孝
Owner MURATA MFG CO LTD
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