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Ultra wideband antenna-oriented crossed H-shaped slot fractal UC-EBG (Uniplanar Compact Electromagnetic bandgap) structure and design method thereof

A HSF-UC-EBG, UC-EBG technology, applied in computing, waveguide devices, special data processing applications, etc., can solve the problems of complex surface patterns, increase equivalent inductance, complex processing, etc., to achieve simple graphics, processing easy effect

Inactive Publication Date: 2012-12-12
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Using these two methods can broaden the bandwidth to about 49%-68%. However, increasing the equivalent inductance will make the surface pattern more complex and increase the difficulty of processing. The use of multi-via method will also complicate the processing.

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  • Ultra wideband antenna-oriented crossed H-shaped slot fractal UC-EBG (Uniplanar Compact Electromagnetic bandgap) structure and design method thereof
  • Ultra wideband antenna-oriented crossed H-shaped slot fractal UC-EBG (Uniplanar Compact Electromagnetic bandgap) structure and design method thereof
  • Ultra wideband antenna-oriented crossed H-shaped slot fractal UC-EBG (Uniplanar Compact Electromagnetic bandgap) structure and design method thereof

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Embodiment Construction

[0042] To further illustrate the substantive characteristics and remarkable progress of the present invention through the following specific embodiments:

[0043] The first step is to design the anisotropic periodic unit structure: introduce H-shaped grooves into the design of the UC-EBG structural periodic unit, in order to improve the utilization rate of the unit patch, introduce a fractal structure to form an anisotropic HSF-UC-EBG structural period unit such as figure 1 . Since the periodic unit is 180°symmetric, the periodic unit is along x 1 direction and along y 1 The UC-EBG structures formed by directional alignment have different bandgap characteristics.

[0044] The second step is to determine the specific parameters through numerical modeling: the numerical modeling uses a suspended microstrip line model (such as image 3 shown), simulate the periodic unit of the different direction HSF-UC-EBG structure along x 1 direction and along y 1 S parameters when the o...

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Abstract

The invention provides an ultra wideband antenna-oriented uniplanar compact electromagnetic bandgap (UC-EBG) structure and a design method thereof, and belongs to the technical field of electromagnetic propagation and receiving. When five anisotropic H-shaped slot fractal (HSF) UC-EBG periodic units designed by the invention are arranged in x1 direction, the bandgap is 1.30-2.58 GHz; when the five anisotropic HSF UC-EBG periodic units designed by the invention are arranged in y1 direction, the bandgap is 2.57-4.31 GHz; and when the units which are arranged in the x1 direction and the y1 direction are crosswise arranged, a formed quasi homonymous crossed HSF-UC-EBG structure has similar bandgap characteristics in two orthogonal directions (set as x2 and y2 directions), the bandgaps are 1.40-4.93 GHz and 1.37-4.93 GHz respectively, and the relative bandgap reaches up to 111.0 percent. The ultra wideband HSF-UCEBG structure provided by the invention can be actually used in an ultra wideband antenna of a corresponding frequency band, so that the problem of difficulty of applying the conventional UC-EBG structure to a wideband system due to narrow relative bandwidth (generally 5-27 percent) is solved.

Description

technical field [0001] The invention provides a coplanar compact electromagnetic band gap (Uniplanar Compact Electromagnetic Band Gap, UC-EBG) structure and a design method thereof for ultra-wideband antennas, belonging to the technical field of electromagnetic transmission and reception. Background technique [0002] 1. Advantages of UC-EBG structure [0003] The EBG structure is a periodic electromagnetic structure with a frequency band gap. According to the structural characteristics, it can be mainly divided into four categories: ground plane defect type, base perforated type, high impedance surface type, and coplanar compact type (UC-EBG). Among them, the UC-EBG structure has many advantages over the other three: [0004] (1) Compared with the ground plane defect type, UC-EBG has more compact characteristics; [0005] (2) Compared with the base perforated type, UC-EBG does not need to perforate the dielectric substrate (perforation will reduce the mechanical strength ...

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Application Information

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IPC IPC(8): H01P1/203H05K1/02G06F17/50
Inventor 纪越峰田慧平赵腊梅
Owner BEIJING UNIV OF POSTS & TELECOMM
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