A dual-polarized filter antenna with high selectivity and low cross-polarization

A filter antenna, high selectivity technology, applied in the direction of antenna, slot antenna, electrical short antenna, etc., can solve the problem that the structure cannot expand the dual-polarization filter antenna, etc., to achieve obvious out-of-band suppression effect, steep edge, directional radiation performance Good results

Active Publication Date: 2019-03-05
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gain performance of both antennas is not compromised due to the absence of additional filtering circuitry
But both filter antennas are single-polarized, and their structure cannot be extended to a dual-polarized filter antenna

Method used

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  • A dual-polarized filter antenna with high selectivity and low cross-polarization
  • A dual-polarized filter antenna with high selectivity and low cross-polarization
  • A dual-polarized filter antenna with high selectivity and low cross-polarization

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Embodiment

[0054] figure 1 and Figure 2(a)-Figure 2(d)As shown, a dual-polarized filter antenna with high selectivity and low cross-polarization does not require an additional filter circuit and has a band-pass filter response, including a metal reflective floor 1 at the bottom, a feed patch 2 in the middle, and a top The parasitic patch 3 and two orthogonal H-shaped feeders 4, 5. The side length of the parasitic patch is P 1 , the side length of the feed patch is P 2 , the upper surface of the first dielectric substrate 9 is printed with parasitic patches, and the feed patch is printed on the upper surface of the second dielectric substrate 10, the dielectric constants of the first and second dielectric plates are both 2.65, and the thicknesses are uniform. It is 1mm, and the side length is represented by L. There is a height h between the first and second dielectric plates 1 The air layer, this design can increase the bandwidth and gain performance of the antenna.

[0055] The m...

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Abstract

The invention discloses a dual-polarized filter antenna with high selectivity and low cross-polarization, which includes a metal reflective floor at the bottom, a feed patch at the middle, a parasitic patch at the top, and first and second The dielectric substrate, the upper surface of the first dielectric substrate is printed with a parasitic patch, and the feed patch is printed on the upper surface of the second dielectric substrate, and also includes two sections of orthogonally coupled feeders, and the two sections of feeders printed on the lower surface of the second dielectric substrate. The feeding structure of the present invention can produce a zero point in the low frequency band of the antenna passband, and at the same time, the designed parasitic patch can produce a zero point in the high frequency band of the passband, and the two zero points provide good bandpass filtering and frequency selection for the antenna sexual effect.

Description

technical field [0001] The invention relates to the field of wireless mobile communication, in particular to a dual-polarization filter antenna with high selectivity and low cross-polarization. Background technique [0002] With the development of mobile communication, in multi-frequency multi-standard communication systems such as 2G / 3G / 4G, the research, design and application of multi-frequency antennas become inevitable. Additionally, dual polarization is an important performance requirement in base station antenna systems. Therefore, multi-frequency dual-polarized antenna arrays will have a large demand. In the design of dual-frequency arrays, two arrays of different frequency bands are usually placed separately to achieve dual-frequency performance. In this design, the coupling between the two frequency bands is an important issue, especially when the two operating frequency bands are relatively close When , the coupling effect will be greater. Although increasing th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q13/10
CPCH01Q1/38H01Q13/10H01Q9/0457H01Q9/0414H01Q9/0478H01Q19/005
Inventor 章秀银段文潘咏梅
Owner SOUTH CHINA UNIV OF TECH
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