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Broadband high-gain circularly polarized filtering antenna

A filtering antenna and high-gain technology, which is applied in the field of radio frequency communication, can solve the problems of not being able to meet the broadband working environment, improve system insertion loss, increase structural complexity, etc., and achieve directivity and high gain, simple structure, and high roll-off Effect

Active Publication Date: 2022-05-31
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the circular polarization filter antennas simply cascade the bandpass filter to the circular polarization antenna, or integrate the circular polarization antenna and the bandpass filter, which increases the structural complexity and improves the system performance. Insertion loss
Existing circularly polarized filter antennas have disadvantages such as narrow working bandwidth, which cannot meet the requirements of broadband working environment.

Method used

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  • Broadband high-gain circularly polarized filtering antenna
  • Broadband high-gain circularly polarized filtering antenna
  • Broadband high-gain circularly polarized filtering antenna

Examples

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Embodiment Construction

[0029] The present invention is further described in detail below in conjunction with embodiments and accompanying drawings, but embodiments of the present invention are not limited thereto.

[0030] as Figure 1 As shown, a broadband high-gain circular polarization filter antenna, comprising a four-layer dielectric plate, the layers are spaced at a certain distance between the layers, from bottom to top including the first layer of the media substrate 1, the second layer of the media substrate 2, the third layer of the media substrate 3 and the fourth layer of the media substrate 4, the first layer of the media substrate surface printing first metal ground 5, the second layer of the media substrate printing gap coupling feeder network, the third layer of the media substrate surface printing radiation structure, the fourth layer of the media substrate of the lower surface printing parasitic structure. The use of the slit coupling feeder network excitates the radiation structure and...

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PUM

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Abstract

The invention discloses a broadband high-gain circularly polarized filtering antenna, and relates to the field of radio frequency communication. The antenna comprises four layers of dielectric substrates from bottom to top, a first metal ground is printed on the upper surface of the first layer of dielectric substrate, a slot coupling feed network is printed on the second layer of dielectric substrate, a radiation structure is printed on the upper surface of the third layer of dielectric substrate, and a parasitic structure is printed on the lower surface of the fourth layer of dielectric substrate. The first metal ground is a square metal copper surface, the radiation structure is a square chamfered radiation patch, and the parasitic structure is a square slotted parasitic patch; the slot coupling feed network comprises a microstrip feed line and a double-Y-shaped slot, the double-Y-shaped slot is printed on a second metal ground, and the second metal ground and the microstrip feed line are printed on the upper surface and the lower surface of the second dielectric substrate respectively. By using the slot coupling feed network to excite the radiator structure with the circular polarization radiation function and the filtering function, good broadband circular polarization radiation characteristics and high-roll-off filtering characteristics are generated.

Description

Technical field [0001] The present invention relates to the field of radio frequency communications, specifically to a wideband high gain circular polarization filter antenna. Background [0002] In the early days of RF technology, antennas and filters were designed separately and cascaded together. A new concept is proposed to explore ways to reduce size and insertion loss: filter antennas. Filter antennas integrate the functions of the filter and antenna without the need to design the antenna and filter separately and cascade them through a 50 ohm port. This can greatly reduce the size of the structure, reduce the complexity of the structure, reduce insertion loss, and signal interference. At the same time, circularly polarized antennas have been a hot topic of inquiry because they can avoid polarization mismatch and can be widely used in wireless local area network (WLAN) systems. [0003] Circularly polarized filter antennas that combine filter antennas with circular polariza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q15/24H01Q15/00
CPCH01Q1/38H01Q1/48H01Q1/50H01Q15/24H01Q15/0053
Inventor 张垚王继兴
Owner XIAMEN UNIV
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