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Multifrequency antenna

A multi-frequency antenna and antenna technology, applied in antennas, resonant antennas, electrical short antennas, etc., can solve problems such as complex structure and increased antenna size

Active Publication Date: 2012-07-18
CASIO COMPUTER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to having a plurality of antenna elements, the above-mentioned multi-frequency antenna requires a large space to install the plurality of antenna elements, increasing the size of the antenna
Furthermore, its structure becomes complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The following describes the multi-frequency antenna 100 according to Embodiment 1 of the present invention.

[0052] First, refer to Figures 1 to 4 The structure of the multi-frequency antenna 100 according to Embodiment 1 will be described. figure 1 is a perspective view of the multi-frequency antenna 100. figure 2 is a plan view of the multi-frequency antenna 100 . image 3 is a bottom view of the multi-frequency antenna 100. Figure 4 is in figure 2 with 3 A cross-sectional view of the antenna 100 at line A-A' in FIG. Here, the X, Y and Z axes all indicate the same direction in these figures. The X axis is parallel to the height direction of the antenna 100 . The Y axis is parallel to the long side direction. The Z axis is parallel to the short side direction.

[0053] As shown, the multi-frequency antenna 100 includes a substrate 99 and multi-frequency antennas 101 and 102 .

[0054] The substrate 99 is a dielectric board, and includes, for example, a g...

Embodiment 2

[0106] The above-described multi-frequency antenna 100 according to Embodiment 1 produces a large gain to the main polarized wave in all directions on the X-Y plane. However, in some applications a stronger emission in one direction is required. The multi-frequency antenna according to the present embodiment produces stronger emissions in one direction.

[0107] The following describes the multi-frequency antenna 300 according to Embodiment 2 of the present invention.

[0108] The multi-frequency antenna 300 according to Embodiment 2 has the multi-frequency antenna 100 on the substrate 99 and such as Figure 9 Shown is the multi-frequency antenna 301 at a distance d from the multi-frequency antenna 100 along the Z-axis direction.

[0109] The multi-frequency antenna 301 is an antenna in which the input / output terminals 110 and 210 of the multi-frequency antenna 100 are short-circuited. More specifically, the multi-frequency antenna 301 includes: a series inductor conductor ...

Embodiment 3

[0130] In Embodiment 2 described above, the multi-frequency antenna 301 having the same shape as the multi-frequency antenna 100 is used as the reflector. However, instead of the multi-frequency antenna 301, a dipole antenna having a resonance frequency for a single frequency may be used.

[0131] The multi-frequency antenna 500 according to Embodiment 3 of the present invention will be described below.

[0132] In the multi-frequency antenna 500, such as Figure 11 As shown, instead of the multi-frequency antenna 301 of the multi-frequency antenna 300 in Embodiment 2, a reflection pattern 590 including a dipole antenna having a rectangular pattern is used. Other structures are the same as the multi-frequency antenna 300 .

[0133] Reflective pattern 590 includes a capacitively loaded rectangular pattern on an elongated line. The reflective pattern 590 has a resonance frequency determined by the width and length of the line and the width and length of the rectangular patter...

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Abstract

The multifrequency antenna comprises a substrate, antenna elements, shunt inductor conductors, series capacitor conductors, series inductor conductors, a connection point, and input / output terminals. The antenna elements are provided on the substrate and electrically connected to the connection point via the shunt inductor conductors. The antenna elements form capacitors together with the parts facing the series capacitor conductors and are electrically connected to the input / output terminals via these capacitors and series inductor conductors.

Description

technical field [0001] The present application generally relates to compact multi-frequency antennas for efficient transmission / reception of radio signals at multiple frequencies. Background technique [0002] Various wireless communication systems, such as wireless LAN and Bluetooth (registered trademark), have been widely used. Such wireless communication systems each have certain advantages and disadvantages. Therefore, a combination of multiple wireless communication systems is generally used instead of using a single wireless communication system. [0003] Different wireless communication systems use different frequency bands. Therefore, radio signals of multiple frequency bands should be transmitted / received to utilize multiple communication systems. For transmitting / receiving radio signals at multiple frequencies, multiple single-frequency antennas or multi-frequency antennas operating on multiple frequencies should be used. However, the use of multi-frequency ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q5/02H01Q1/38H01Q5/10H01Q5/15H01Q5/335H01Q5/357H01Q9/16H01Q19/13
CPCH01Q1/242H01Q5/0034H01Q9/285H01Q5/321H01Q1/38H01Q5/15
Inventor 青木由隆八木茂齐藤昭本城和彦
Owner CASIO COMPUTER CO LTD