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Electromagnetic soft surface structure and construction method thereof

An electromagnetic soft surface and soft surface technology, applied in the microwave field, can solve the problems of large distance between antennas and small coupling effect, and achieve the effect of increasing the stopband bandwidth, increasing the bandwidth, and realizing miniaturization.

Active Publication Date: 2015-01-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, these methods often seldom consider the influence of the structure on the antenna radiation pattern, and the distance between the antennas is generally relatively large, so that the coupling effect at the center frequency itself is very small

Method used

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  • Electromagnetic soft surface structure and construction method thereof
  • Electromagnetic soft surface structure and construction method thereof
  • Electromagnetic soft surface structure and construction method thereof

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Embodiment Construction

[0027] The present invention will be described in further detail below with reference to the accompanying drawings.

[0028] The present invention needs a computer, a vector network analyzer (VNA) and a processed dielectric plate with an electromagnetic soft surface structure and two microstrip antennas with a dielectric constant of 2.65 during the design and implementation process. The computer was used to run Ansoft-HFSS to model and simulate the bandgap characteristics of the soft surface structure and its characteristics for reducing the coupling of the microstrip antenna. VNA is used to test the actual performance of the processed soft surface structure to suppress microstrip antenna coupling.

[0029] Such as figure 1 , the present invention is an 8×1 electromagnetic soft surface structure formed by periodically extending an electromagnetic soft surface unit along one direction on a one-dimensional plane. Each electromagnetic soft surface unit consists of three parts, ...

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Abstract

The invention relates to an electromagnetic soft surface structure and a construction method of the electromagnetic soft surface structure, and belongs to the technical field of microwaves. The electromagnetic soft surface structure can restrict surface wave propagation in specific frequency bands. The electromagnetic soft surface structure is characterized in that on the basis that soft surface patches are rectangular stripe edges and staggered rectangular sawteeth, rectangular grooves are formed along the lower edges of the rectangular sawteeth, namely in the width direction of the rectangular stripes, and conductive through holes are formed in the rectangular sawteeth on the same side. The length of each rectangular sawtooth is L, the width of each rectangular sawtooth is P, the length of each rectangular groove in the long side direction of the rectangular stripes is L1, the length of each rectangular groove in the wide edge direction of the rectangular stripes is w1, the width of each rectangular stripe is w, and the value range of w is obtained according to the expression (please see the expression in the specifications), wherein epsilon<r> is the dielectric constant of a dielectric layer, lambda<0> is operating wavelength, L is smaller than or equal to 3 mm, and P is smaller than half of the distance between the two through holes. The electromagnetic soft surface structure and the construction method of the electromagnetic soft surface structure can be directly applied to reduction of coupling between microstrip antennae.

Description

technical field [0001] The invention relates to an electromagnetic soft surface structure capable of suppressing surface wave propagation in a specific frequency band and a construction method thereof, belonging to the field of microwave technology. It can be directly applied to reduce the coupling between microstrip antennas. Background technique [0002] In order to miniaturize the overall volume of the handheld wireless communication device and along with the miniaturization of the array antennas, the antennas therein will be placed very close together. This will cause strong coupling between the antennas, thereby deteriorating the performance of the antennas. To reduce the inter-antenna coupling, researchers have proposed many different methods. Among the most common methods are the use of High Impedance Surfaces (HIS) and Electromagnetic Bandgap Structures (EBG). However, these methods often seldom consider the influence of the structure on the antenna radiation mode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/52
Inventor 陈海燕黄星星韩满贵谢建良邓龙江
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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