Broadband surface wave antenna loaded based on inhomogeneous period structure

A non-uniform period, surface wave technology, applied in the directions of antenna arrays, antennas, antenna arrays, etc. that are powered separately, can solve the problems of restricting the application of wireless communication systems, narrow bandwidth, etc., and achieve widening bandwidth, reducing bandwidth, and wide impedance bandwidth Effect

Active Publication Date: 2017-10-20
XIDIAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: the existing surface wave antenna based on the periodic structure adopts a uniform patch array, and its bandwidth is narrow, which limits its application in wireless communication systems

Method used

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  • Broadband surface wave antenna loaded based on inhomogeneous period structure
  • Broadband surface wave antenna loaded based on inhomogeneous period structure
  • Broadband surface wave antenna loaded based on inhomogeneous period structure

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] Such as figure 1As shown, the broadband surface wave antenna based on non-uniform periodic structure loading provided by the embodiment of the present invention includes m×m periodic metal patch arrays 1 arranged at equal intervals, a first dielectric substrate 5, a circular patch 2, a second Two dielectric substrates 6, a metal floor 3 and a coaxial probe 4, wherein m≥3, in the embodiment of the present invention, m is selected as 8, and the patch unit of the periodic patch ar...

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Abstract

The invention belongs to the field of antenna technology, and discloses a broadband surface wave antenna loaded based on an inhomogeneous period structure. The antenna comprises a periodical metal path array which is printed on the upper surface of a first dielectric substrate. The first dielectric substrate is arranged above a second dielectric substrate and an air medium is utilized for separating. A circular patch is printed on the upper surface of the second dielectric substrate. A metal floor is arranged on the lower surface of the second dielectric substrate. An inner conductor in a coaxial probe is connected with the center of the circular path and the center of the metal floor. Compared with a uniform period patch unit which is utilized in an existing surface wave antenna, the inhomogeneous periodical path unit is advantageous in that two adjacent resonant modes are excited simultaneously; and the bandwidth of the antenna is expanded through combining the two resonant modes. Compared with a no-air-medium structure of an existing surface wave antenna, the broadband surface wave antenna is advantages in that a feeding unit utilizes air near-coupling for supplying a relatively wide impedance bandwidth; and furthermore the broadband surface wave antenna has advantages of reducing radius of the metal floor, prolonging path of a surface wave diffraction field, and realizing a broadband characteristic.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a broadband surface wave antenna loaded based on a non-uniform periodic structure. Background technique [0002] Modern wireless communication systems, such as WLAN (Wireless Local Area Network), usually require antennas to radiate a horizontal omnidirectional pattern. The traditional monopole antenna has a simple structure, can provide vertical polarization and has good omnidirectional characteristics in the horizontal pattern, but its biggest disadvantage is the high profile, which is difficult to be used in platforms with limited space. Microstrip antennas have the advantages of low profile, light weight, small size, and easy integration, so microstrip patch antennas with omnidirectional patterns have been widely studied. However, the main disadvantage of the microstrip antenna is its narrow bandwidth, which requires the use of technologies to widen the bandwidth. The usual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q21/00H01Q21/06
CPCH01Q1/38H01Q1/48H01Q1/50H01Q21/0018H01Q21/065
Inventor 冯桂荣陈蕾史小卫杨耀州岳浩
Owner XIDIAN UNIV
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