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Low-standing-wave ratio and ultra-wide band planar slot antenna

A technology of slot antenna and standing wave ratio, which is applied in the field of low standing wave ratio ultra-wideband planar antenna, can solve the problems of low standing wave ratio performance, etc., and achieve the effect of low profile, low cost and simple structure

Inactive Publication Date: 2011-06-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing indoor coverage antennas cannot meet the requirements of my country's mobile communication system for this low VSWR performance.

Method used

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  • Low-standing-wave ratio and ultra-wide band planar slot antenna
  • Low-standing-wave ratio and ultra-wide band planar slot antenna
  • Low-standing-wave ratio and ultra-wide band planar slot antenna

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one: see figure 1 and figure 2 , a local standing wave ratio ultra-wideband planar slot antenna, a low standing wave ratio ultra-wideband planar slot antenna, consists of a dielectric substrate 3, a microstrip feeder guide strip printed on the front of the dielectric substrate 3, an elliptical ring feed terminal 2 and an attached The metal floor on the back of the dielectric substrate 3 constitutes. The microstrip feeder guide strip is composed of a 50-ohm microstrip line, a tapered microstrip line whose characteristic impedance linearly changes from 50 ohms to R ohms, and a three-pronged microstrip line guide strip; the feed terminal 2 is an elliptical annular metal patch; The metal floor 6 is a metal patch with a wide slit 1; the wide slit 1 is a combined shape of a polygon and a semi-ellipse. The place where the conduction band connects with the elliptical ring feed terminal 2 .

Embodiment 2

[0028] Embodiment 2: This embodiment is basically the same as Example 1. This low VSWR ultra-broadband planar slot antenna is composed of a microstrip feeder guide band printed on the front side of the dielectric substrate 3 and an elliptical ring feed terminal 5, a dielectric substrate 3, and It consists of a metal floor 2 with a wide gap 1. The microstrip feeder conductor strip is composed of a 50-ohm microstrip line, a gradient microstrip line whose characteristic impedance linearly changes from 50 ohms to R (about 60-100) ohms, and a three-pronged microstrip line conductor strip. The wide slit 1 is a combination of a polygon and a semi-ellipse. Its shape is mainly based on a rectangle, and the bottom of the rectangle bulges inward. An SMA or N-type coaxial connector 4 is arranged on the metal floor 2, and the inner conductor (probe) of the connector 4 passes through the dielectric substrate and is connected to the 50-ohm microstrip line conduction strip on the front of the...

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Abstract

The invention relates to a low-standing-wave ratio and ultra-wide band planar slot antenna, which consists of a medium substrate (3), a micro-strip feeder conduction band and an elliptical annular feed source terminal (2) printed on a front surface of the medium substrate (3), and a metal ground plate adhered to the back of the medium substrate (3), wherein the micro-strip feeder conduction band consists of a 50-ohm micro-strip line, a graded micro-strip line having characteristic impedance graded to R (about 60-100) ohm linearly from 50 ohm, and a trifurcate micro-strip line conduction band; a wide slot is a polygonal and semi-elliptical combined slot, a lower edge of which is bumped inwards; the metal ground plate is provided with a sub-miniature-A (SMA) coaxial connector or an N-type coaxial connector; a conductor (a probe) in the connector penetrates through the medium substrate and is connected with the 50-ohm micro-strip line on the front surface of the antenna; and the connector is connected with a 50-ohm coaxial feeder externally to feed the antenna. The voltage standing-wave ratio of the antenna within a frequency band of 780MHz to 3,000MHz is not more than 1.5, thereby meeting the requirement of a national mobile communication system on a standing-wave ratio performance standard and being capable of covering each general frequency band of mobile communication. The low-standing-wave ratio and ultra-wide band planar slot antenna has a plane printing structure, is low in profile, simple in manufacturing and low in cost and is applicable to large-scale batch production.

Description

technical field [0001] The invention relates to a novel and beautified planar antenna for a mobile communication system, in particular to a low standing wave ratio ultra-wideband planar antenna for China Mobile Communications. Background technique [0002] Microstrip antenna has many advantages such as planar structure, low profile, light weight, easy manufacture, and integration with microwave circuits, etc. University Press, Xi'an, 1991). In recent years, many broadband antenna technologies have been developed (see Zhong Shunshi, Liang Xianling, Yan Xiaorong, ultra-wideband planar antenna technology, Journal of Radio Science, Vol. 22, No. 2, pp.308–315, 2007.4), Literature (J.-Y. Sze and K.-L. Wong, Bandwidth enhancement of a microstrip line-fed printed wide-slot antenna, IEEE Trans. Antennas Propag. Vol. 49, No. 7, pp. 1020–1024, Jul. 2001) Fork-shaped microstrip stubs are used to widen the frequency band for a wideband slot antenna fed by a microstrip line, literature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/10H01Q1/38
Inventor 钟顺时孔令兵
Owner SHANGHAI UNIV