Broadband dual-polarization base station filter antenna element and array without external filter circuit

A filter circuit and filter antenna technology, applied in the field of radio frequency communication, can solve the problems of large insertion loss and complex circuit structure of the filter antenna, and achieve the effects of high isolation, stable radiation pattern and low manufacturing cost.

Pending Publication Date: 2018-12-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the embodiments of the present invention is to provide a compact broadband dual-polarization base station filter antenna unit and its antenna array with high selectivity without an external filter circuit, which overcomes the large insertion loss and complex circuit structure of traditional filter antennas Defects, and due to broadband characteristics, bandpass filtering characteristics, and good frequency selectivity and dual polarization radiation characteristics make it more widely used in multi-frequency base station antennas

Method used

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  • Broadband dual-polarization base station filter antenna element and array without external filter circuit
  • Broadband dual-polarization base station filter antenna element and array without external filter circuit
  • Broadband dual-polarization base station filter antenna element and array without external filter circuit

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Embodiment 1

[0038] Such as Figure 1 to Figure 4 As shown, this embodiment provides a compact broadband dual-polarization base station filter antenna unit with high selectivity without an external filter circuit, from Figure 1 to Figure 3 It can be seen from the figure that the antenna unit is placed in the middle of the reflector 1, and the dipole arm dielectric plate 2 and the dielectric plate 3 of the upper metal parasitic ring are supported and fixed in sequence by four supporting baluns 10. The four dipole arms It is a metal patch, printed on the upper layer of the vibrator arm dielectric board 2.

[0039] The antenna unit works in the 2G / 3G / 4G frequency band (1.66-2.73GHz) in the multi-frequency mobile communication base station antenna, from figure 1As can be seen in the figure, the antenna unit includes the first dipole arm 5, the second dipole arm 6, the third dipole arm 7, the fourth dipole arm 8, the upper metal parasitic ring dielectric plate 3, the dipole arm dielectric pla...

Embodiment 2

[0052] Such as Figure 9 As shown, it is the single-frequency dual-polarization base station antenna array of this embodiment, which includes a single-frequency antenna array reflector 15 and at least one compact broadband dual-polarization base station filter antenna unit with high selectivity without an external filter circuit That is, the single-frequency antenna array vibrator 16, that is, this embodiment is a single-row antenna array, and the antenna units are placed on the single-frequency antenna array reflector 15 and are located on the same horizontal plane. The structure of the antenna units in this embodiment is the same as that in Embodiment 1.

Embodiment 3

[0054] Such as Figure 10 As shown, the dual-frequency dual-polarization base station antenna array of this embodiment includes a reflector 17, at least one compact broadband dual-polarization base station filter antenna unit with high selectivity without an external filter circuit, that is, the dual-frequency antenna array The high-frequency vibrator 19 and at least one antenna unit working in the low-frequency band, that is, the low-frequency vibrator 18 in the dual-frequency antenna array, that is, the present embodiment is a dual-column antenna array, and the two antenna units are placed on the reflector 17 of the dual-frequency antenna array. A compact wideband dual-polarized base station filter antenna unit 19 with no external filtering circuit is placed on one side of the dual-frequency antenna array reflector 17, and 18 working in the low frequency band is placed on the other side of the dual-frequency antenna array reflector 17 One side, and located on the same horizo...

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PUM

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Abstract

The invention discloses a broadband dual-polarization base station filter antenna unit without an external filter circuit and an array thereof. The antenna unit is arranged in the middle of the reflector. The antenna comprises an oscillator arm, a balun and two parasitic metal rings. The vibrator arm is provided with a microstrip line branch, is connected through the balun, and is fed through thebalun, and the balun is provided with a feeder line. The upper part and the lower part of the vibrator arm are respectively provided with parasitic metal rings. The antenna unit has the characteristics of compact and simple structure. The invention realizes good out-of-band rejection effect and has good frequency selectivity without cascading filter, thus avoiding filter insertion loss. The invention realizes high polarization isolation, and realizes stable pattern in wide frequency band at the same time.

Description

technical field [0001] The invention relates to the field of radio frequency communication, in particular to a high-selectivity compact broadband dual-polarization base station filter antenna unit and its constituent antenna array without an external filter circuit. Background technique [0002] With the rapid development of communication technology, the construction of multi-frequency base station antennas in communication systems requires different sub-array antennas to work in different frequency bands. However, since different sub-array antennas are close to each other, they will interfere with antennas operating in adjacent operating frequency bands, which will cause serious coupling and affect the radiation pattern of the antennas. Therefore, the antenna needs to achieve good inter-frequency isolation. Instead, cascaded filters or combiners / duplexers are used. This will cause a large loss. Filter antenna is a better solution to this problem. [0003] Specific liter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/24H01Q21/30
CPCH01Q1/246H01Q1/36H01Q21/30
Inventor 章秀银丁潮锋张志杰曹云飞薛泉
Owner SOUTH CHINA UNIV OF TECH
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