Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Antenna and wireless communication apparatus

一种天线、天线元件的技术，应用在天线、天线零部件、天线支持物/安装装置等方向，能够解决匹配电路损失变大、难天线谐振频率等问题，达到增大损失的效果

Inactive Publication Date: 2010-02-03
MURATA MFG CO LTD
View PDF5 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in such figure 1 In the shown conventional antenna, which is composed of a surface-mounted antenna component constituting a part of the inductor part and a capacitor connected to a ring-shaped radiation electrode pattern formed in a non-grounded area of ​​the mounting board, it is difficult due to the occupied area of ​​the parallel resonant circuit. Set the resonant frequency of the antenna to a desired low value
[0009] Therefore, it is necessary to increase figure 1 In the matching circuit composed of inductors L0 and L1 shown, the inductance value of the inductor L1 which affects the resonant frequency of the antenna has a problem of increasing the loss in the matching circuit as a result.
Of course, if the area of ​​the non-ground region 201a is enlarged and the path length of the parallel radiation electrode pattern 3 is extended, it is possible to configure an antenna resonating at a desired low frequency, but this leads to an overall increase in size.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Antenna and wireless communication apparatus
  • Antenna and wireless communication apparatus
  • Antenna and wireless communication apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach 》

[0078] refer to Figure 2 to Figure 6 The antenna and wireless communication device according to the first embodiment will be described.

[0079] figure 2 It is a perspective view of the antenna of the first embodiment. Such as figure 2 As shown, this antenna 101 is configured by mounting the surface mount antenna element 10 on the non-ground region 17 of the mounting substrate 20 . The surface mount antenna element 10 has two linear electrodes 12 and 13 parallel to each other on the surface of a rectangular parallelepiped dielectric substrate 11, and a part of one of the electrodes 12 constitutes a capacitor portion based on a gap facing each other at a predetermined interval. g.

[0080] The first radiation electrode 14 and the second radiation electrode 15 which are respectively connected to the two linear electrodes 12 and 13 and constitute an inductor portion are formed in the non-ground region 17 of the mounting substrate 20 . Furthermore, the first radiation elec...

no. 2 Embodiment approach 》

[0088] Figure 7 It is a perspective view of the antenna of the second embodiment. and in the first embodiment figure 2 The antenna 101 shown is different in that it is provided with chip-shaped reactance elements 21 , 22 , and 23 . That is, the reactance elements 21 and 22 are surface-mounted to the first radiation electrode 14 so as to be connected in series, respectively. In addition, the second radiation electrode is composed of two linear electrode portions 15a, 15b parallel to each other, and a reactance element 23 is surface-mounted to connect predetermined positions of the two linear electrode portions 15a, 15b.

[0089] In addition, when chip inductors are used as the reactance elements 21 and 22, the inductors are connected in series with the first radiation electrode 14 on the side close to the power supply unit 19, so that the above-mentioned parallel resonant circuit and power supply can be unnecessary. The impedance matching inductor between elements 19 ( f...

no. 3 Embodiment approach 》

[0093] Figure 8 It is a perspective view of the antenna of 3rd Embodiment. and Figure 7 The antenna shown differs in the shape of the second radiation electrode 15 and the mounting structure of the reactance element 24 facing it. That is, the second radiation electrode 15 is The reactance element 24 is installed in order to connect two linear electrode portions parallel to each other.

[0094] Figure 9 yes Figure 8 A circuit diagram of antenna 103 is shown. Figure 9 (A) is an example when all the reactance elements 21, 22, and 24 are chip inductors, Figure 9 (B) is an example when the reactance elements 21 and 22 are chip inductors and 24 is a chip capacitor.

[0095] exist Figure 9 In (A) and (B), the inductors L14 a and L14 b are inductors of the first radiation electrode 14 , and the inductors L31 and L32 are inductors of the reactance elements (chip inductors) 21 and 23 . In addition, the inductor L15 is an inductor of the second radiation electrode 15 . ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A surface mounting antenna element (10) is provided with linear electrodes (12a, 12b, 13) on the surface of a substrate (11) and having at least one capacitor portion (g) facing at a predetermined interval at a part of at least one of two linear electrodes. The surface mounting antenna element is mounted in the non-ground region (17) of a mounting substrate (20). A first radiation electrode (14) and linear electrode portions (15a, 15b) of second radiation electrodes are formed in the non-ground region (17), and the linear electrodes of the surface mounting antenna element (10) are connected, respectively, with the radiation electrodes. Chip reactance elements (21, 22, 23) are mounted, as required, on the first radiation electrode (14) and the linear electrodes of the second radiation electrodes (15a, 15b).

Description

technical field [0001] The present invention relates to an antenna used in a wireless communication device such as a mobile communication device and a wireless communication device having the antenna. Background technique [0002] In wireless communication devices such as terminal devices (mobile phones) of mobile phone systems, surface mount antennas are often used from the viewpoint of miniaturization and ease of frequency adjustment. In conventional general surface-mount antennas, an inductance portion is provided by forming a radiation electrode on the surface of a dielectric substrate, and a capacitance portion is formed by spatially separating the open end of the radiation electrode from a power supply electrode, thereby forming an LC as a whole. resonant circuit. [0003] And in recent years, as disclosed in Patent Document 1, a mobile communication device has been proposed, and in particular a surface-mounted antenna has been proposed. Improvement of antenna effici...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/24H01Q1/38H01Q5/01H01Q5/10
CPCH01Q1/2283H01Q1/243H01Q5/0034H01Q1/38H01Q5/0055H01Q5/321H01Q5/364
Inventor 小村良
Owner MURATA MFG CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com