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High-frequency circuit and communication device

A technology of high-frequency circuits and inductors, which is applied in the parts, electrical components, radio frequency amplifiers, etc. of amplifying devices, and can solve problems such as inability to obtain characteristics

Active Publication Date: 2022-03-29
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the high-frequency circuit described in Patent Document 1, depending on the arrangement of the first inductor and the second inductor on the mounting board, there is a possibility that the first inductor inductor is coupled with the second inductor and the desired characteristics cannot be obtained

Method used

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  • High-frequency circuit and communication device
  • High-frequency circuit and communication device
  • High-frequency circuit and communication device

Examples

Experimental program
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Embodiment approach 1

[0020] (1) Structure of high frequency circuit

[0021] First, refer to figure 1 The configuration of the high-frequency circuit 1 according to Embodiment 1 will be described.

[0022] The high-frequency circuit 1 of Embodiment 1 is used in the communication device 100, for example. The communication device 100 is, for example, a mobile phone such as a smartphone. In addition, the communication device 100 is not limited to a mobile phone, and may also be a wearable terminal such as a smart watch, for example. The high-frequency circuit 1 can support, for example, carrier aggregation (Carrier Aggregation) and dual connectivity (Dual Connectivity).

[0023] The high-frequency circuit 1 is provided, for example, in a multi-band communication device 100 conforming to a communication standard such as LTE (Long Term Evolution: Long Term Evolution). The high-frequency circuit 1 can realize full-duplex communication by assigning different frequencies to the transmission signal (hi...

Embodiment approach 2

[0136] refer to Figure 5 , Figure 6A and Figure 6B A high-frequency circuit 1A and a communication device 100A according to Embodiment 2 will be described.

[0137]In the high-frequency circuit 1A of the second embodiment, the direction of the current flowing in the inductor 72 of the output matching circuit 7 connected to the output side of the power amplifier 5 can be changed, which is different from the high-frequency circuit 1 of the first embodiment. different. In addition, the same code|symbol is attached|subjected to the same structure as the high frequency circuit 1 of Embodiment 1, and description is abbreviate|omitted. In addition, in the communication device 100A, except for the high-frequency circuit 1A, it is the same as the communication device 100 of Embodiment 1, and description thereof will be omitted here.

[0138] (1) Structure of high frequency circuit

[0139] First, refer to Figure 5 The configuration of the high-frequency circuit 1A of Embodime...

Embodiment approach 3

[0179] refer to Figure 7 , Figure 8A and Figure 8B The high-frequency circuit 1B and the communication device 100B according to Embodiment 3 will be described.

[0180] In the high-frequency circuit 1B of the third embodiment, the high-frequency circuit 1 of the first embodiment and the high-frequency circuit 1 of the second embodiment are superior in that the direction of the current flowing through the inductor 91 included in the low-pass filter 9 can be changed. Frequency circuit 1A is different. In addition, the same code|symbol is attached|subjected to the same structure as the high frequency circuit 1 of Embodiment 1 and the high frequency circuit 1A of Embodiment 2, and description is abbreviate|omitted. In addition, the communication device 100B is the same as the communication device 100 of Embodiment 1 except for the high-frequency circuit 1B, and description thereof will be omitted here.

[0181] (1) Structure of high frequency circuit

[0182] First, refer ...

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Abstract

And desired characteristics are obtained. A high-frequency circuit (1) is provided with an inductor (81) and a switch (18). The inductor (81) has a first end (811) and a second end (812). The switch (18) has a first input / output terminal (181), a second input / output terminal (182), a first switching terminal (183) connected to a first end (811) of the inductor (81), and a second switching terminal (184) connected to a second end (812) of the inductor (81). The switch (18) is capable of switching between a first state and a second state. In a first state, the first input / output terminal (181) is connected to the first switching terminal (183), and the second input / output terminal (182) is connected to the second switching terminal (184). In the second state, the first input / output terminal (181) is connected to the second switching terminal (184), and the second input / output terminal (182) is connected to the first switching terminal (183).

Description

technical field [0001] The present invention generally relates to a high-frequency circuit and a communication device, and more specifically, relates to a high-frequency circuit including an inductor and a communication device including the high-frequency circuit. Background technique [0002] Conventionally, a high-frequency circuit capable of supporting a plurality of frequency bands is known (for example, refer to Patent Document 1). The high-frequency circuit described in Patent Document 1 includes an input-side impedance matching circuit and an output-side impedance matching circuit. The input-side impedance matching circuit includes a first inductor mounted on a mounting substrate. The output side impedance matching circuit includes a second inductor mounted on the mounting substrate. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2019-68205. [0004] In the high-frequency circuit described in Patent Document 1, depending on the arrangement of the first i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04B1/525
CPCH04B1/40H04B1/525H04B1/00H03F1/565H03F3/195H03F3/245H03F2200/451H03F2200/171H03F2200/294H03F2200/165
Inventor 竹中功
Owner MURATA MFG CO LTD
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