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Broadband slot antenna with filter character

A technology of slot antenna and filtering characteristics, applied in the field of planar antennas, can solve the problems of difficult to see the slot antenna, lack of filtering characteristics of the antenna, lack of filtering characteristics, etc., and achieve the effect of simple design, low cost and small size

Inactive Publication Date: 2016-03-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing slot antenna structure, on the one hand, its operating bandwidth is generally narrow, and there is still a lot of room for improvement; on the other hand, these slot antennas basically lack good filtering characteristics, so they often need Cascade a filter, thus greatly increasing the weight and volume of the system
[0004] In 2009, M. Gopikrishna et al. published an article entitled "DESIGNOFAMICROSTIPFEDSTEPSLOTANTENNAFORUWBCOMMUNICATION" on "Microwaveandopticaltechnology letters". On the one hand, the article improved the traditional uniform impedance gap to a step impedance gap, and on the other hand, the feed structure was also improved to 1 / 4 wavelength Microstrip feed, this double optimization greatly improves the working bandwidth of the antenna, but the antenna still lacks good filtering characteristics
[0007] Therefore, among the disclosed planar slot antennas, it is difficult to see a slot antenna with both wide bandwidth and filtering characteristics. It is necessary to design a high-performance slot antenna that overcomes this shortcoming to meet people's needs

Method used

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  • Broadband slot antenna with filter character
  • Broadband slot antenna with filter character
  • Broadband slot antenna with filter character

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Embodiment 1

[0034] figure 1 , 2 , 3 are the vertical cross-sectional view, the two-dimensional structural schematic diagram and the bottom schematic diagram of the slot antenna, including the dielectric substrate 10, the microstrip structure 11 formed by the metal foil on the upper surface of the dielectric substrate 10, the ground 12 formed by the metal foil on the lower surface of the substrate 10, and A slot structure 13 formed by digging a groove in the ground 12 . The microstrip structure 11 includes a microstrip feed structure 111 , a first microstrip resonator structure 112 and a second microstrip resonator substructure 113 , and the slot structure 13 includes a first slot structure 131 and a second slot structure 132 . The length of the first microstrip resonator structure 112 is 1 / 2 wavelength, the length of the second microstrip resonator structure 113 is about 1 / 4 wavelength, and the second microstrip resonator structure 113 is placed in the center of the first microstrip reso...

Embodiment 2

[0038] Figure 4 , 5 They are the vertical cross-sectional view and the two-dimensional structure schematic diagram of the slot antenna respectively. On the basis of Embodiment 1, the metal via hole 14 in the dielectric substrate 10 is added, and the third microstrip resonator structure 114 replaces the first embodiment in the embodiment. Two microstrip resonator structures 113 . The length of the third microstrip resonator structure 114 is about 1 / 4 wavelength, and the third microstrip resonator structure 114 is perpendicular to the first microstrip resonator structure 112 . The metal via 14 is placed on an edge of the third microstrip resonator structure 114 away from the first microstrip resonator structure 112 .

[0039] Figure 7It is the |S11| and gain simulation results of the broadband slot antenna with filter characteristics in embodiment 2. The 10dB return loss range of the slot antenna is 4.0GHz to 6.4GHz, and the relative bandwidth has reached 46.2%, which is in...

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Abstract

The invention discloses a broadband slot antenna with a filter character. The broadband slot antenna comprises a dielectric medium substrate, a micro-strip structure formed on a metal foil on the upper surface of the dielectric medium substrate, a slot structure which is formed on a metal foil on the lower surface of the dielectric medium substrate and is provided with a groove in the ground, and a metal via hole which is formed in the dielectric medium substrate in an up-and-down penetrating manner, wherein the metal via hole passes through the micro-strip structure and the group at the same time, and the micro-strip structure comprises two structures such as a micro-strip feed structure and a micro-strip resonator structure. The micro-strip feed structure is used for coupling energy to the micro-strip resonator structure, so that a plurality of resonant mode stimulation slot radiation structures are generated by the micro-strip resonator structure, and the purposes of expanding bandwidth and having the filter characteristic are achieved at the same time. The broadband slot antenna with the filter character disclosed by the invention is simple in structure, light in weight and easy for processing and manufacturing, and is suitable for various wireless terminals.

Description

technical field [0001] The invention relates to the field of planar antennas, in particular to a broadband slot antenna with filtering characteristics. Background technique [0002] A well-designed high-performance antenna can effectively control the spatial distribution of electromagnetic energy while sending and receiving signals, optimize network quality, increase system capacity, and greatly improve the overall system performance. The microwave filter plays the role of selecting signals, attenuating noise, and filtering image frequency interference. Integrating the antenna and filter and designing it into a module to form a filter antenna can not only reduce the size and area of ​​the antenna filter system, but also be more conducive to package integration, which can effectively reduce the size and weight of the three-dimensional package of the system, and further realize wireless Miniaturization design of communication system. [0003] Slot antennas, more commonly mic...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01P7/08
Inventor 陈付昌胡豪涛
Owner SOUTH CHINA UNIV OF TECH
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