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Communication apparatus

A communication device, a technology for receiving signals, applied in the directions of antenna supports/installation devices, electrical components, antenna coupling, etc., which can solve the problem that the distance between grounds is not far enough, the effect is not sufficient, and the distance between grounds is sufficient and sufficient, etc. problems, to achieve the effect of preventing oscillation, reducing the influence of noise, and eliminating the degradation of reception performance

Inactive Publication Date: 2012-09-26
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] According to the technique described in Patent Document 1, although the ground wiring is made into different systems, in reality, if the distance between the grounds is not sufficiently long, no sufficient effect can be obtained.
Especially in the substrate of small devices, it is often difficult to obtain a sufficient distance between the grounds
[0011] In addition, the technology described in Patent Document 2 is not applicable to communication devices where the distance from the antenna to the device that is the source of noise is less than 10 cm.

Method used

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no. 1 approach

[0036] Below, refer to Figure 1~6 One embodiment of the communication device of the present invention will be described. figure 1 It is the appearance of the communication device showing the state before taking measures against power amplifier oscillation. This communication device can be used in a PC card housing, and includes a printed wiring board 1, a chip antenna 2, an RF circuit unit 3, a digital circuit unit 4, and an L-shaped metal plate 5 (conductor). The RF circuit unit 3 has a transmitting unit 6 and a receiving unit 7 , and the transmitting unit 6 is composed of an RFSAW filter 8 , a power amplifier 9 , an isolator 10 , an RF switch 11 , and a dielectric filter 12 .

[0037] The printed wiring board 1 includes a connector 1a at one end. Connector 1a connects to the connector in the expansion slot of the notebook computer.

[0038]On the printed wiring board 1 , a chip antenna 2 , an RF circuit unit 3 , and a digital circuit unit 4 are mounted in order from one ...

no. 2 approach

[0062] Below, refer to Figure 7-9 A second embodiment of the present invention will be described. Figure 7 It is a perspective view showing the appearance of the communication device in this embodiment. The communication device can be used in a PC card housing, and includes a printed wiring board 21, a chip antenna 22, an RF circuit 23, a digital circuit 24, and an L-shaped metal plate 25 (conductor).

[0063] One end of the printed wiring board 21 includes a connector 21a. The connector 21a is connected to the connector in the expansion slot of the notebook computer.

[0064] On the printed wiring board 21 , a chip antenna 22 , an RF circuit 23 , and a digital circuit 24 are mounted in order from the end farther from the connector 21 a. In addition, the printed wiring board 21 has a ground conductor, and the L-shaped metal plate 25 is connected thereto.

[0065] The longitudinal direction of the chip antenna 22 is substantially perpendicular to the arrangement direction...

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Abstract

A communication apparatus wherein oscillation of a power amplifier, which is a problem due to having a conductor for suppressing influence of noise to a chip antenna, is eliminated. The communication apparatus is provided with a chip antenna (2) for capturing radio waves of a desired frequency; a RF circuit (3) , which is mounted on a printed wiring board (1) and converting the received signals inputted from the chip antenna (2) into low frequency signals; a digital circuit (4), which is mounted on the printed wiring board (1) and demodulates the low frequency received signals inputted from the RF circuit (3); a conductor (5), which is arranged between the chip antenna (2) and the digital circuit (4) and extends to a position at a prescribed height from the printed wiring board (1), with one end connected to the ground conductor of the printed wiring board (1); and a radio wave absorber (13) added to the conductor (5).

Description

technical field [0001] The invention relates to a communication device. Background technique [0002] Conventionally, there are various types of communication devices for wireless communication with external devices such as base stations. form etc. [0003] Although these communication devices have an antenna for establishing a wireless communication line with a base station, etc., to transmit and receive radio waves, as this antenna, in recent years, it has been replaced by an antenna that protrudes outward from the viewpoint of appearance and cost. Started using the chip antenna built into the housing. [0004] However, if a chip antenna is used, due to its characteristics, noise generated in a device placed close to the chip antenna is easily absorbed by the chip antenna. As a result, there is a problem that the chip antenna's reception performance of radio waves of a desired frequency decreases. Approachable devices include, for example, a digital circuit commonly mou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/52H01Q1/24H01Q17/00H01Q23/00H04B1/38H04B1/3822
Inventor 河田俊彦中田慎一野地真树
Owner KYOCERA CORP