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A low profile filter antenna with wideband out-of-band rejection

A filtering antenna and low-profile technology, applied in antennas, resonant antennas, electrical short antennas, etc., can solve the problem that patch filter antennas do not have out-of-band harmonic suppression, and achieve good results, good radiation characteristics, and good frequency selectivity Effect

Active Publication Date: 2022-07-26
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention solves the technical problem that the patch filter antenna has no good out-of-band harmonic suppression

Method used

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  • A low profile filter antenna with wideband out-of-band rejection
  • A low profile filter antenna with wideband out-of-band rejection
  • A low profile filter antenna with wideband out-of-band rejection

Examples

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Effect test

Embodiment 1

[0023] With the continuous development of more and more functions in communication systems in recent years, the manufacturing has become more and more accurate, and the requirements for multi-function and miniaturization have become more and more common. Patch antennas are widely used because of their ease of integration and manufacturing. Affecting the communication quality, the patch filter antenna can filter out the interference signal. However, the usual patch filter antenna can only suppress the interference signal near the passband or the structure is more complex, and it will still be affected by high-frequency harmonics. A filter antenna with low profile and broadband out-of-band rejection is designed by research and experiment.

[0024] The invention is a filter antenna with low profile and wide band external suppression, comprising a dielectric substrate, on which are printed metal radiation patch, metal floor and microstrip feeder, metal radiation patch and etching s...

Embodiment 2

[0027] The overall composition of a low-profile filter antenna with broadband out-of-band suppression is the same as that in Embodiment 1, see image 3 , the rectangular double slit structure 8 etched on the rectangular metal radiation patch 3 of the present invention forms a radiation zero point at high frequency. The rectangular double-slit structure 8-line width s1 is in the range of 0.3-0.8mm, the length l1 is in the range of 12-13mm, and the spacing d1 is in the range of 14-16mm.

[0028] In this example, the width s1 of the 8-line rectangular double-slit structure is selected to be 0.3mm, the range of the length l1 is 12mm, and the range of the spacing d1 is 14mm. This selection is suitable for higher frequency antennas.

Embodiment 3

[0030] The overall composition of a low-profile filter antenna with broadband out-of-band suppression is the same as that of Embodiment 1-2. In this example, the 8-line width s1 of the rectangular double-slit structure is selected to be 0.8mm, the length l1 range is 13mm, and the spacing d1 range is 16mm. This selection is suitable for lower frequency antennas.

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Abstract

The invention discloses a low-profile filter antenna with wide band out-of-band suppression, which solves the technical problem that the patch filter antenna does not have good out-of-band suppression. A rectangular metal radiation patch with a rectangular double-slit structure is etched to form zero radiation at high frequencies; the upper and lower surfaces of the second dielectric substrate are respectively printed with a metal floor and a cross-shaped metal microstrip feeder, and a transparent metal floor is etched on the metal floor. A rectangular slot and a U-shaped slot, the U-shaped slot is at the center of the metal floor, forming a zero radiation at low frequencies; an air layer exists between the first and second dielectric substrates. In the present invention, the filter structures are separately arranged on the upper and lower dielectric substrates to generate radiation zero points at high frequency and low frequency respectively, and a cross-type feeder is added to increase the out-of-band suppression range, improve the pass-band selectivity, and reduce the out-of-band gain. level, can be used in wireless communication systems.

Description

technical field [0001] The invention belongs to the field of antenna technology, and relates to a patch filter antenna, in particular to a filter antenna with low profile and broadband out-of-band suppression, which is suitable for a communication system requiring an easy-to-integrate structure and capable of suppressing interference signals. Background technique [0002] Due to the development of the communication system, all parts of the communication system have undergone great changes and progress than before. At the beginning, the system only needs to implement simple signal transmission, the function is relatively single, and the impact of noise on the communication system is not considered. With the development of more and more forms of modern communication, in order to achieve better communication effects and enhance the ability to resist harsh environments, the requirements for communication equipment are getting higher and higher. [0003] With the increasing use ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q9/04H01Q1/48H01Q1/38H01Q1/50
CPCH01Q9/0414H01Q9/045H01Q1/48H01Q1/50H01Q1/38
Inventor 张立孙季秋翁子彬鲁昊曹志勋
Owner XIDIAN UNIV
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