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Filtering antenna capable of restraining high frequency harmonic waves

A technology for filtering antennas and high-frequency harmonics, applied in the field of wireless mobile communications, can solve problems such as signal interference, power loss, and inability to suppress high-order harmonics, achieve harmonic elimination, improve selectivity, and improve high-frequency stopbands Effect

Inactive Publication Date: 2016-03-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the above-mentioned filter antennas have good filter selectivity, they cannot suppress high-order harmonics, and the radiation of high-order harmonics will cause additional power loss and signal interference

Method used

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  • Filtering antenna capable of restraining high frequency harmonic waves
  • Filtering antenna capable of restraining high frequency harmonic waves
  • Filtering antenna capable of restraining high frequency harmonic waves

Examples

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Embodiment 1

[0040] like figure 1 and figure 2 As shown, the filter antenna of this embodiment includes a dielectric plate 1, a stepped impedance resonator 2, a stepped impedance symmetric vibrator 3, a low-pass filter 4, and a feed unit 5;

[0041] The dielectric board 1 adopts a PCB board with a thickness of 0.8 mm and a dielectric constant of 2.55;

[0042] The stepped impedance resonator 2 and the stepped impedance symmetric vibrator 3 are both arranged on the top layer of the dielectric plate 1, and the stepped impedance resonator 2 is close to the stepped impedance symmetric vibrator 3 to form an antenna unit together; wherein the stepped impedance symmetric vibrator 3 is used as the main The radiating unit can shift high-order harmonics to high frequencies to reduce the influence of high-order harmonics on radiation; the stepped impedance resonator 2 has a concave shape and is a parasitic stepped impedance resonator that can be used in the high-frequency stop band Add a radiation...

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Abstract

The invention discloses a filtering antenna capable of restraining high frequency harmonic waves. The filtering antenna comprises a dielectric plate, a stepped-impedance resonator, a stepped-impedance symmetrical oscillator, a low-pass filter and a feed unit; the stepped-impedance resonator and the stepped-impedance symmetrical oscillator are both arranged on the top layer of the dielectric plate; the stepped-impedance resonator is close to the stepped-impedance symmetrical oscillator to form an antenna unit; an upper conductor of the low-pass filter is arranged on the top layer of the dielectric layer, and is connected with a left arm of the stepped-impedance symmetrical oscillator; a lower conductor of the low-pass filter is arranged on the bottom layer of the dielectric plate and connected with a right arm of the stepped-impedance symmetrical oscillator through a via hole; an upper conductor of the feed unit is arranged on the top layer of the dielectric plate and connected with the upper conductor of the low-pass filter; a lower conductor of the feed unit is arranged on the bottom layer of the dielectric plate and connected with the low conductor of the low-pass filter; and the projection of the upper conductor of the feed unit on the bottom layer of the dielectric layer is positioned in the center of the lower conductor. The filtering antenna capable of restraining high frequency harmonic waves has the characteristics of high rectangle degree and capability of effectively restraining harmful harmonic waves.

Description

technical field [0001] The invention relates to a filter antenna, in particular to a filter antenna capable of suppressing high-frequency harmonics, and belongs to the field of wireless mobile communication. Background technique [0002] With the rapid development of wireless communication technology, radio frequency and microwave devices are required to be more compact in size. The development of various multifunctional devices has been proved to be a good way to solve this problem. The traditional filter and antenna are two independent devices. It is designed separately in the wireless communication system, and the filter antenna is an integration of the antenna and the filter and has the functions of two devices. [0003] In recent years, there have been many studies on filter antennas. Literature [1] proposed a method for comprehensive design of filters and antennas; the filter antennas synthesized in literature [2]-[4] have good frequency selectivity; literature [ 5] B...

Claims

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Application Information

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IPC IPC(8): H01Q23/00H01Q1/50
CPCH01Q1/50H01Q23/00
Inventor 孙光华王世伟祝雷褚庆昕
Owner SOUTH CHINA UNIV OF TECH
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