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Image antenna and radio communication device with said antenna

A graphic antenna and graphic technology, applied to antenna support/installation devices, devices that enable antennas to work in different bands at the same time, antennas, etc., can solve problems such as hindering miniaturization

Inactive Publication Date: 2002-03-27
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this requires an excessively large area for antenna installation and thus hinders its miniaturization

Method used

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  • Image antenna and radio communication device with said antenna
  • Image antenna and radio communication device with said antenna
  • Image antenna and radio communication device with said antenna

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0036] A first embodiment of the present invention will be described with reference to the drawings. figure 1 is a schematic diagram showing the surface of the pattern antenna of this embodiment. figure 2 is a graph showing the frequency response of the voltage standing wave ratio of the pattern antenna of this embodiment.

[0037] like figure 1 As shown, the pattern antenna of this embodiment is composed of an inverted F-shaped antenna pattern 1 formed on the surface of a glass-epoxy (glass fiber reinforced epoxy) circuit board 4 . An inverted F-shaped antenna pattern 1 is formed on an edge portion of a circuit board 4 which also has other circuit patterns and the like formed thereon.

[0038] like figure 1 As shown, on the surface of the circuit board 4 , two ground conductor portions 3 are formed, and a feed transmission path 2 is formed between the two ground conductor portions 3 . like figure 1 As shown, the inverted F-shaped antenna pattern 1 formed on the surf...

no. 2 example

[0046] A second embodiment of the present invention will be described below with reference to the drawings. Figure 4 is a view showing the front side surface of the pattern antenna of this embodiment; Figure 5 is a view showing the reverse side surface of this embodiment; Image 6 is the pattern antenna of this embodiment along the figure 1 and 2 Sectional view taken along the line X-Y shown; Figure 7 is a graph showing the voltage standing wave ratio (VSWR) frequency response of the pattern antenna of this embodiment. Here, elements serving the same purpose as in the pattern antenna of the first embodiment are identified by the same reference numerals, and their detailed descriptions will not be repeated.

[0047] The pattern antenna of this embodiment consists of such as Figure 4 The shown inverted F-shaped antenna pattern 1 formed on the front side surface of a glass-epoxy resin (ie, glass fiber-reinforced epoxy resin) circuit board 4 and as shown in FIG. Figure...

no. 3 example

[0058] A third embodiment of the present invention will be described with reference to the drawings. Figure 8 is a view showing the front side surface of the pattern antenna of this embodiment; Figure 9 is a view showing the back side surface of the pattern antenna of this embodiment; Figure 10 is the pattern antenna of this embodiment along the Figure 8 and Figure 9 Sectional view taken along the line X-Y shown; Figure 11 is a graph showing the frequency response of the voltage standing wave ratio (VSWR) of the pattern antenna of this embodiment. Here, elements serving the same purpose as those in the second embodiment are identified by the same reference numerals, and detailed explanation thereof will not be repeated.

[0059] The pattern antenna of this embodiment consists of such as Figure 8 The shown inverted L-shaped antenna pattern 7 formed on the front side surface of the glass-epoxy resin circuit board 4 and the Figure 9 The shown inverted L-shaped anten...

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PUM

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Abstract

An inverted-F-shaped antenna pattern 1 is formed as a driven element on a surface of a glass-epoxy circuit board 4. This antenna pattern 1 has a feeding conductor pattern 1b connected to a feeding transmission path 2 formed on the surface of the circuit board 4 and a grounding conductor pattern 1c connected to a grounding conductor portion 3 formed on the surface of the circuit board 4. The feeding conductor pattern 1b is formed so as to have a tapered shape so that its width increases gradually from where it is connected to the feeding transmission path 2 toward an elongate pattern 1a of the antenna pattern 1.

Description

technical field [0001] The present invention relates to a pattern antenna formed on a circuit board. More particularly, the present invention relates to a pattern antenna which is small and light in weight yet allows wide-range transmission and reception, and to a wireless communication device equipped with such a pattern antenna. Background technique [0002] In mobile communications using small wireless devices such as cellular phones or indoor wireless LAN (Local Area Network) terminals, these wireless devices used as mobile units need to be equipped with small, high-performance antennas. As small antennas for such applications, thin planar antennas have attracted attention due to their ability to be incorporated into devices. Since planar antennas utilize microstrip antennas, a typical example of a microstrip antenna is Figure 20A The short-circuited microstrip antenna and Figure 20B The planar inverted F-shaped antenna shown in . Recently, as w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/30H01Q1/24H01Q1/38H01Q9/04H01Q9/40H01Q9/42
CPCH01Q9/0421H01Q1/243H01Q1/38H01Q9/42
Inventor 增田义行
Owner SHARP KK