Broadband panel array antenna

Patent metadata

Field	Value
Publication number	US-11600930-B2
Application number	US-202117321524-A
Country	US
Kind code	B2
Filing date	May 17, 2021
Priority date	May 18, 2020
Publication date	Mar 7, 2023
Grant date	Mar 7, 2023

Abstract

A broadband panel array antenna includes a polarization layer, a radiating layer and a feed layer which are sequentially stacked from top to bottom. The feed layer is used for converting a single path of TE10 mode signals into a plurality of paths of same-power in-phase TE10 mode signals and transmitting the plurality of paths of TE10 mode signals to the radiating layer. The radiating layer is used for radiating the plurality of paths of TE10 mode signals from the feed layer to a free space. The polarization layer is used for rotating the polarization direction of an electric field generated by the radiating layer to reduce the side lobe in an E-plane direction diagram and an H-plane direction diagram. The broadband panel array antenna has the advantages of being low in side lobe, high in gain and efficiency, and low in machining cost.

First claim

What is claimed is:

1. A broadband panel array antenna comprising a polarization layer, a radiating layer and a feed layer which are sequentially stacked from top to bottom, wherein the feed layer is used for converting a single path of TE10 mode signals into a plurality of paths of same-power in-phase TE10 mode signals and transmitting the plurality of paths of TE10 mode signals to the radiating layer, the radiating layer is used for radiating the plurality of paths of TE10 mode signals from the feed layer to a free space, and the polarization layer is used for rotating a polarization direction of an electric field generated by the radiating layer to reduce a side lobe in an E-plane direction diagram and an H-plane direction diagram.

2. The broadband panel array antenna according to claim 1 , wherein the polarization layer comprises a dielectric substrate, a first metal layer disposed on a lower surface of the dielectric substrate, and a second metal layer disposed on an upper surface of the dielectric substrate, the dielectric substrate is made of plastic and is of a rectangular structure, a lengthwise direction of the dielectric substrate is defined as a left-right direction, and a widthwise direction of the dielectric substrate is defined as a front-back direction; the first metal layer comprises M first metal strips attached to the lower surface of the dielectric substrate, M is an integer which is greater than or equal to 2, each of the first metal strips is of a rectangular structure, the M first metal strips are identical in size and are regularly disposed at intervals from front to back, a left end face of each of the first metal strips is located on the same plane as a left end face of the dielectric substrate, a right end face of each of the first metal strips is located on the same plane as a right end face of the dielectric substrate, a front end face of a foremost first metal strip of the first metal strips is located on the same plane as a front end face of the dielectric substrate, and a rear end face of a rearmost first metal strip of the first metal strips is located on the same plane as a rear end face of the dielectric substrate; a center distance between every two adjacent first metal strips of the first metal strips is 0.1λ, λ=c/f, c is the wave velocity and meets: c=3*10{circumflex over ( )}8 m/s, and f is a center operating frequency of the broadband panel array antenna; the second metal layer comprises M second metal strips attached to the upper surface of the dielectric substrate, each of the second metal strips is in an isosceles trapezoid shape, a connecting line between a midpoint of an upper line and a midpoint of a lower line of each of the second metal strips is located on a vertical plane where a diagonal line of the upper surface of the dielectric substrate is located, planes where two legs of each of the second metal strips are located overlap with planes where two adjacent end faces of the dielectric substrate are located, and the M first metal strips are in one-to-one correspondence with the M second metal strips; and regarding the first metal strips and the second metal strips corresponding to the first metal strips, if the first metal strips are mapped onto the upper surface of the dielectric substrate and are then anticlockwise rotated by 45°, the front end faces of the first metal strips overlap with the upper lines of the second metal strips, and the rear end faces of the first metal strips overlap with the lower lines of the second metal strips.

3. The broadband panel array antenna according to claim 1 , wherein the radiating layer comprises a first panel and a radiating array disposed on the first panel, wherein the first panel is rectangular, the radiating array is formed by n 2 radiating units which are distributed in 2 (k-1) rows and 2 (k-1) columns, n=2 (k-1) , k is an integer which is greater than or equal to 3, a center distance between every two adjacent radiating units of the radiating units in the same row is 1.8λ, and a center distance between every two adjacent radiating units of the radiating units in the same column is 1.8λ; each of the radiating units comprises two first radiating elements and two second radiating elements, wherein the two first radiating elements are parallelly arranged left and right in a spaced manner, the first radiating element on the left overlaps with the first radiating element on the right after being moved rightwards by 0.9λ, the two second radiating elements are arranged left and right in a spaced manner, the second radiating element on the left overlaps with the second radiating element on the right after being moved rightwards by 0.9λ, the two second radiating elements are located behind the two first radiating elements, a center distance between the second radiating element on the left and the first radiating element on the left is 0.9λ, the second radiating element on the left and the first radiating element on the left are symmetrical front and back, a center distance between the second radiating element on the right and the first radiating element on the right is 0.9λ, and the second radiating element on the right and the first radiating element on the right are symmetrical front and back; the first radiating element comprises a first rectangular cavity, a second rectangular cavity, a third rectangular cavity, a fourth rectangular cavity, a first rectangular matching board, a second rectangular matching board and a third rectangular matching board, the first rectangular cavity, the second rectangular cavity, the third rectangular cavity and the fourth rectangular cavity are formed in the first panel and are sequentially stacked and communicated from top to bottom, a center of the first rectangular cavity, a center of the second rectangular cavity, a center of the third rectangular cavity and a center of the fourth rectangular cavity are located on the same straight line, a front end face of the first rectangular cavity, a front end face of the second rectangular cavity, a front end face of the third rectangular cavity and a front end face of the fourth rectangular cavity are parallel to a front end face of the first panel, an upper end face of the first rectangular cavity is located on the same plane as an upper end face of the first panel, an upper end face of the second rectangular cavity is located on the same plane as a lower end face of the first rectangular cavity, an upper end face of the third rectangular cavity is located on the same plane as a lower end face of the second rectangular cavity, an upper end face of the fourth rectangular cavity is located on the same plane as a lower end face of the third rectangular cavity, a lower end face of the fourth rectangular cavity is located on the same plane as a lower end face of the first panel, a left-right length of the first rectangular cavity is 0.8λ, a front-back length of the first rectangular cavity is 0.7λ, a height of the first rectangular cavity is 0.25λ, a left-right length of the second rectangular cavity is 0.6λ, a front-back length of the second rectangular cavity is 0.5λ, a height of the second rectangular cavity is 0.125λ, a left-right length of the third rectangular cavity is 0.6λ, a front-back length of the third rectangular cavity is less than 0.5λ, a height of the third rectangular cavity is 0.3λ, a left-right length of the fourth rectangular cavity is half of the left-right length of the first rectangular cavity, a front-back length of the fourth rectangular cavity is two fifths of the front-back length of the first rectangular cavity, the first rectangular matching board and the second rectangular matching board are located in the third rectangular cavity, a rear wall of the first rectangular matching board is attached and integrally connected to a rear wall of the third rectangular cavity, a distance from a left end face of

Assignees

• Univ Ningbo

Inventors

• You Yang
• Huang Jifu
• Zhang Ling
• You Qingchun
• Lu Yunlong

Classifications

• H01Q21/064 Primary

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• H01Q1/38

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• H01Q15/246

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