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Miniaturized unipolar ultra-wideband antenna

An ultra-wideband antenna and monopole technology, which is applied in the directions of antenna coupling, antenna grounding device, and radiation element structure, can solve the problems of large monopole UWB antenna size and insufficient broadband, and achieve excellent UWB characteristics and optimization performance, reducing the effect of electromagnetic coupling

Active Publication Date: 2017-05-17
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a miniaturized monopole ultra-wideband antenna, aiming to solve the problem that the existing monopole UWB antenna has a large size and insufficient broadband in miniaturization and broadbandization

Method used

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  • Miniaturized unipolar ultra-wideband antenna
  • Miniaturized unipolar ultra-wideband antenna
  • Miniaturized unipolar ultra-wideband antenna

Examples

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Embodiment 1

[0032] The structure provided by the embodiment of the present invention is as figure 1 , where (a) is the top view of the antenna, and (b) is the side view of the antenna. Including: substrate, circular radiation patch, impedance matching input transmission line and ground plane, also includes two asymmetric stubs. On the basis of the traditional monopole UWB antenna, the present invention reduces the size of the floor and the size of the radiation unit; the surface of the substrate 1 is provided with a circular radiation patch 2, an impedance matching input transmission line 4 and a grounding plate 3, and the circular radiation patch 2. The impedance matching input transmission line 4 and the grounding plate 3 are separated on both sides of the substrate 1; one end of the impedance matching input transmission line 4 is connected to the bottom end of the circular radiation patch 2, and the other end is connected to the bottom end of the substrate 1; impedance matching Two gr...

Embodiment 2

[0036] Such as figure 1 As shown, the structure of this example is the same as that of Example 1, and the different parameters are: the length of the first asymmetric branch 5 is 14 mm.

[0037] The application effect of the present invention will be described in detail below in conjunction with simulation.

[0038] image 3 The simulated and measured S11 parameters and voltage standing wave ratio VSWR of the present invention are given. It can be seen that the -10dB bandwidth of the antenna basically covers the 3.1GHz-10.6GHz frequency band, and the introduction of the first asymmetric branch 5 makes the antenna resonate at 3GHz. The slight difference between the simulated and measured data is due to the accuracy of the antenna manufacturing, the error when the antenna is welded to the SAM head, and the surrounding environmental factors during the measurement.

[0039] Figure 4 given the attached figure 1 The shown antenna realizes the measurement results of the surface...

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Abstract

The invention discloses a miniaturized unipolar ultra-wideband (UWB) antenna. The antenna comprises a substrate, a circular radiation patch, ground plates, and an impedance matching input transmission line. One corner of each ground plate near the circular radiation patch adopts a triangular corner cut technology. Two asymmetric stubs extend from the right side of the ground plates, wherein a first asymmetric stub is parallel to the impedance matching input transmission line, and a second asymmetric stub is perpendicular to the impedance matching input transmission line and is bent towards the bottom end. One end of the impedance matching input transmission line is connected with the bottom end of the circular radiation patch, and the other end is connected with the bottom end of the substrate. The two ground plates are arranged on the two sides of the impedance matching input transmission line respectively. The circular radiation patch, the impedance matching input transmission line and the ground plates are arranged on the two sides of the substrate respectively. By adding the asymmetric radiation stubs to the ground plates, the size of the antenna is reduced while excellent UWB characteristic is maintained, and the antenna can be easily integrated into a mobile handheld terminal.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a miniaturized monopole ultra-wideband antenna. Background technique [0002] Since the U.S. Federal Communications Commission (FCC) put the 3.1GHz-10.6GHz frequency band into civilian use, the requirements for antenna coverage bandwidth in wireless communication systems have also increased. Ultra-wideband (UWB) antennas are characterized by their high transmission rate, low Strong interference ability and other advantages have been widely concerned and researched. On the other hand, with the rapid development of mobile handheld terminals and microwave integrated circuits, the design of antenna miniaturization has gradually become a trend. The size of the monopole UWB antenna is only half of the traditional dipole structure antenna, about a quarter of the wavelength. It can realize UWB characteristics and does not change significantly with frequency. It is easy to integrate wit...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/48H01Q1/52
CPCH01Q1/38H01Q1/48H01Q1/52
Inventor 黑永强李文涛张聪左功同李力
Owner XIDIAN UNIV