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Multi-frequency antenna

A multi-frequency antenna and grounding technology, which is applied to antennas, antenna supports/installation devices, and devices that make the antenna work in different frequency bands at the same time, can solve the problems of short grounding and affect the impedance matching of the antenna, and reduce the overall high effect

Inactive Publication Date: 2009-06-17
FOXCONN (KUNSHAN) COMPUTER CONNECTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]However, the impedance matching of the above-mentioned planar inverted "F" antenna multi-frequency antenna depends on the side length of the ground part. In some special cases, the side length of the ground part The side may be very short, which may not satisfy the capacitance formed with the conductive pin, thus affecting the impedance matching of the antenna

Method used

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  • Multi-frequency antenna
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Examples

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Embodiment Construction

[0014] Please refer to FIG. 1 and FIG. 2 , which are perspective views of a multi-frequency antenna 100 according to a first embodiment of the present invention. In this embodiment, the multi-frequency antenna 100 is applied in mobile electronic devices such as notebook computers, and it is formed by bending and cutting a metal sheet, including a grounding portion 40 with two vertical sides mostly located on a horizontal plane, The radiation part 20 , the coaxial cable 80 , and the connection part 300 connecting the radiation part 20 and the ground part 40 are located above the ground part 40 and spaced apart from the ground part 40 .

[0015] The grounding portion 40 includes a grounding main body 41 located on a first plane and a side 42 extending vertically upward from one side of the main body 41 . A corner of the grounding body portion 41 has a notch. A mounting portion 50 vertically extends upward from the edge of the notch, and the mounting portion 50 has a mounting ho...

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Abstract

The invention relates to a multiband antenna comprising a grounding portion, a radiating portion and a connection portion, wherein the grounding portion located on a first plane is provided with two lengthwise edges, the radiating portion is located on a second plane and is separated from the grounding portion in arrangement, the connection portion is located on an impedance matching portion, the first plane is parallel to the third plane, the impedance matching portion in n-shape is electrically connected with the grounding portion and the radiating portion, the impedance matching portion includes a first branch electrically connected with the grounding portion, a second branch parallel to the first branch and a third branch connected with the first branch and the second branch. As the impedance matching portion is provided with the three independent branches, impedance matching can be freely adjusted as required, further the impedance matching portion is parallel to the grounding portion, and the whole height of the multiband antenna can be reduced.

Description

【Technical field】 [0001] The invention relates to a multi-frequency antenna, in particular to a multi-frequency antenna with better impedance matching effect. 【Background technique】 [0002] In modern electronic equipment, the use of wireless communication technology for wireless transmission of data, sound, images, etc. has been more and more used. Antenna, as a component used to induce electromagnetic waves, is a necessary device for the application of wireless communication technology equipment. [0003] Planar Inverted-F Antenna (PIFA) is a small antenna commonly used in mobile communication terminals. It is characterized by small size and light weight, which can effectively reduce occupied space and manufacturing cost, and is easy to realize dual-frequency or multi-frequency. Another very important feature of it is that it has both horizontal polarization and vertical polarization, and is suitable for places with complex electromagnetic environments. However, the imp...

Claims

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Application Information

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IPC IPC(8): H01Q1/22H01Q1/36H01Q5/00H01Q13/08H01Q5/20H01Q5/328
Inventor 苏纹枫戴隆盛曾宪圣
Owner FOXCONN (KUNSHAN) COMPUTER CONNECTOR CO LTD