Tri-band ultra-wide-band antenna with defected ground and circular groove

An ultra-wideband antenna and circular slot technology, which is applied to antennas, antenna grounding devices, and devices that enable antennas to work in different frequency bands at the same time. and other problems, to achieve the effect of more frequency bands, good application value and small size

Inactive Publication Date: 2015-09-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing multi-band antennas have the disadvantages of large volume and complex structure, and cannot adapt to the trend of thinner and lighter mobile terminal equipment

Method used

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  • Tri-band ultra-wide-band antenna with defected ground and circular groove
  • Tri-band ultra-wide-band antenna with defected ground and circular groove
  • Tri-band ultra-wide-band antenna with defected ground and circular groove

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Experimental program
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Effect test

Embodiment

[0035] Embodiment: Antenna structure such as figure 1 As shown, the corresponding parameters are as figure 2 As shown, the antenna is printed on a size of 30×20×1.6mm 3 3 on the dielectric substrate, that is, on the FR4 substrate. The front side of the dielectric substrate 3 is a microstrip radiation patch 1 engraved with a circular groove. The ground plate 2 on the back of the antenna is transformed from a rectangular slot as follows: a rectangular slot is opened on the vertical axis of the rectangular ground plate, and two relatively long and narrow rectangular slots are opened on the rectangular ground plate. The specific parameter list is shown in Table 1:

[0036] Table 1 (unit: mm)

[0037] l

l1

l2

l3

l4

w

w1

30

13

9.1

6.9

12

20

3

w2

w3

w4

w5

w6

d

8.5

12

3.25

3.25

5

8.8

[0038] image 3 is the return loss diagram of the circular...

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Abstract

The invention discloses a tri-band ultra-wide-band antenna with a defected ground and a circular groove. The antenna comprises a micro-strip radiation patch, a ground plate and a dielectric substrate, wherein the micro-strip radiation patch is fixed in the middle of the front side of the dielectric substrate, and the length of the micro-strip radiation patch is equal to that of the dielectric substrate; the micro-strip radiation patch comprises a wide rectangular part and a narrow rectangular part, and the circular groove is formed in the wide rectangular part of the micro-strip radiation patch; the ground plate is fixed at the bottom end of the back side of the dielectric substrate, the width of the ground plate is equal to that of the dielectric substrate, and three rectangular grooves are formed in the ground plate and are symmetrical about the vertical axis of the dielectric substrate. The defected ground structure and the circular groove radiation patch structure are designed skillfully, and three specific working bands are realized; compared with a multi-band antenna in the prior art, the antenna has the larger impedance bandwidth and more working frequency bands and is simple in structure, so that the application range is wide.

Description

technical field [0001] The present invention relates to a multi-band antenna, in particular to a three-band ultra-wideband antenna with defective circular slots. Background technique [0002] With the rapid development of mobile terminals, various wireless communication systems emerge. For mobile phones, on the premise of satisfying the voice call function, it can also provide functions such as online audio and video appreciation, data download and upload, real-time precise satellite positioning and other functions, which requires mobile phone antennas to be able to cover GSM, WCDMA, WLAN, WiMAX, Multiple working frequency bands such as GPS. As the size of mobile terminals such as mobile phones and pads continues to be thinner and thinner, the space reserved for antennas is very limited. If multiple separate antennas are used to cover the above-mentioned applications of different frequency bands, this will not only increase the overall size of the system, but also increase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q5/28
Inventor 董健胡国强岳艳涛施荣华
Owner CENT SOUTH UNIV
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