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Bow-tie slot antenna based on coplanar waveguide feed

A slot antenna and waveguide feeding technology, applied in the field of miniaturized broadband antennas and butterfly slot antennas, can solve problems such as small impedance bandwidth, achieve flat gain, improve gain characteristics, and increase bandwidth.

Active Publication Date: 2014-04-16
广州世晨通信技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Impedance bandwidth achieved by prior art is small

Method used

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  • Bow-tie slot antenna based on coplanar waveguide feed
  • Bow-tie slot antenna based on coplanar waveguide feed
  • Bow-tie slot antenna based on coplanar waveguide feed

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail:

[0019] as attached figure 2 As shown, the butterfly slot antenna fed by an asymmetric coplanar waveguide according to the present invention includes a ground plate 1 and a dielectric substrate 2, the center of the dielectric substrate is selected as the coordinate origin, and a butterfly as a radiation unit is etched on the ground plate 1. The butterfly slot 3 and the asymmetric coplanar waveguide feeding the butterfly slot, the butterfly slot 3 is symmetrical about the X axis, in order to improve the low-frequency gain, a triangular annular guide band 7 is loaded in the butterfly slot; the asymmetric coplanar waveguide It consists of a central conduction strip 6 and slots 4 and 5 on both sides, wherein the slot 4 on the right is bent and its length increases, forming an asymmetric coplanar waveguide with slots on both sides of different lengths.

[0020] ...

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Abstract

The invention relates to small broadband antennae, in particular to a bow-tie slot antenna based on coplanar waveguide feed. The antenna comprises an earth plate (1) and a dielectric substrate (2), wherein the earth plate (1) is etched with bow-tie slots (3), the two bow-tie slots are bilaterally symmetrical to the X-axis with the center of the dielectric substrate as the origin of coordinates, asymmetrical coplanar waveguide feed is adopted, and annular conduction bands (7) are loaded inside the bow-tie slots. By lengthening and bending one feed slot, impedance matching of the antenna is improved, and the bandwidth of the antenna is increased. Due to the fact that the triangular annular conduction bands are loaded inside the bow-tie slots, low-frequency gains of the antenna are improved, and the gains of the antenna in a working band are made flatter. The antenna works at 2.76-8.1 GHz, relative bandwidth reaches 150.84%, the gains in the working band are all larger than 1.5dBi, and the maximum gain can reach 5.53dBi. The bow-tie slot antenna based on coplanar waveguide feed is simple in design, easy to machine, and suitable for a broadband wireless communication system.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a miniaturized broadband antenna in a wireless communication system, in particular to a butterfly slot antenna based on coplanar waveguide feeding. Background technique [0002] With the rapid development of wireless communication, global positioning system, satellite communication, personal communication and other communication systems put forward higher requirements for the broadband and miniaturization of the antenna. The broadband antenna can cover multiple frequency bands, which can reduce the number of antennas required by the communication system, thereby reducing system cost and weight. [0003] Butterfly-shaped slot antenna has received extensive attention due to its advantages of wider bandwidth and smaller size. The structure of a butterfly antenna fed by a traditional coplanar waveguide (CPW) is as follows: figure 1 As shown in , the length and width of the slots...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q13/10
Inventor 张文梅陈新伟李莉韩丽萍许莉娜
Owner 广州世晨通信技术有限公司
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