Ultra-wideband CTS flat-plate array antenna

Patent metadata

Field	Value
Publication number	US-10784579-B2
Application number	US-201916416297-A
Country	US
Kind code	B2
Filing date	May 20, 2019
Priority date	Jul 9, 2018
Publication date	Sep 22, 2020
Grant date	Sep 22, 2020

Abstract

An ultra-wideband CTS flat-plate array antenna includes a radiating layer, a mode switching layer and a feed network layer sequentially arrayed from top to bottom. The mode switching layer comprises a first metal plate and a mode switching cavity formed in the first metal plate and including two mode switching units which are arranged left and right and each includes eight H-plane Y-type single-ridge waveguide power dividers arrayed in 4 rows and 2 columns. The H-plane Y-type single-ridge waveguide power divider in the mth row and 1st column is bilaterally symmetrical with the H-plane Y-type single-ridge waveguide power divider in the mth row and 2nd column. The two H-plane Y-type single-ridge waveguide power dividers in the each row are connected through an E-plane T-type single-ridge waveguide power divider. A center distance between every two adjacent H-plane Y-type single-ridge waveguide power dividers in each column is not over one wavelength.

First claim

What is claimed is:

1. An ultra-wideband CTS flat-plate array antenna, comprising a radiating layer, a mode switching layer and a feed network layer which are sequentially arrayed from top to bottom, wherein the mode switching layer comprises a first metal plate and a mode switching cavity formed in the first metal plate, and the mode switching cavity comprises two mode switching units which are identical in structure and are arranged left and right in a spaced manner; each mode switching unit comprises eight H-plane Y-type single-ridge waveguide power dividers which are arrayed in 4 rows and 2 columns, wherein the H-plane Y-type single-ridge waveguide power divider in the m th row and 1 st column is bilaterally symmetrical with the H-plane Y-type single-ridge waveguide power divider in the m th row and 2 nd column, and m=1, 2, 3 and 4; the two H-plane Y-type single-ridge waveguide power dividers in each row are connected through an E-plane T-type single-ridge waveguide power divider, and a center distance between every two adjacent H-plane Y-type single-ridge waveguide power dividers in each column is not over one wavelength; the H-plane Y-type single-ridge waveguide power divider in the m th row and 1 st column comprises a first rectangular cavity, an isosceles-trapezoid cavity, a second rectangular cavity, a third rectangular cavity, a fourth rectangular cavity and a fifth rectangular cavity which are sequentially formed in an upper end face of the first metal plate from right to left, the first rectangular cavity, the isosceles-trapezoid cavity, the second rectangular cavity, the third rectangular cavity, the fourth rectangular cavity and the fifth rectangular cavity are sequentially communicated front and back, are identical in height and are lower than the first metal plate, and center lines of the first rectangular cavity, the isosceles-trapezoid cavity, the second rectangular cavity, the third rectangular cavity, the fourth rectangular cavity and the fifth rectangular cavity in a front-back direction are located on the same straight line; a length direction of the first rectangular cavity, the second rectangular cavity, the third rectangular cavity, the fourth rectangular cavity and the fifth rectangular cavity is defined as a front-back direction of the first metal plate, and a width direction of the first rectangular cavity, the second rectangular cavity, the third rectangular cavity, the fourth rectangular cavity and the fifth rectangular cavity is defined as a left-right direction of the first metal plate; a right end face of the isosceles-trapezoid cavity is parallel to a left end face of the isosceles-trapezoid cavity and is smaller than the left end face of the isosceles-trapezoid cavity in size, and a front end face of the isosceles-trapezoid cavity is equal to a rear end face of the isosceles-trapezoid cavity; a right end face of the first rectangular cavity is flush with the left end face of the isosceles-trapezoid cavity, a length of the first rectangular cavity is smaller than that of the right end face of the isosceles-trapezoid cavity in the front-back direction of the first metal plate, the left end face of the isosceles-trapezoid cavity overlaps with a right end face of the second rectangular cavity and is as large as the right end face of the second rectangular cavity, a left end face of the second rectangular cavity is flush with a right end face of the third rectangular cavity, a length of the third rectangular cavity is greater than that of the second rectangular cavity, a left end face of the third rectangular cavity is flush with a right end face of the fourth rectangular cavity, a length of the fourth rectangular cavity is greater than that of the third rectangular cavity, a left end face of the fourth rectangular cavity is flush with a right end face of the fifth rectangular cavity, and a length of the fifth rectangular cavity is greater than that of the fourth rectangular cavity; a first rectangular metal ridge is arranged in the first rectangular cavity, a right end face of the first rectangular metal ridge is flush with the right end face of the first rectangular cavity, a left end face of the first rectangular metal ridge is flush with the left end face of the first rectangular cavity, a height of the first rectangular metal ridge is half that of the first rectangular cavity, a length of the first rectangular metal ridge in the front-back direction of the first metal plate is smaller than a quarter of the length of the first rectangular cavity, and a distance between the front end face of the first rectangular metal ridge and a front end face of the first rectangular cavity is equal to a distance between the rear end face of the first rectangular metal ridge and a rear end face of the first rectangular cavity; a first rectangular metal base plate and a second rectangular metal ridge are arranged in the isosceles-trapezoid cavity, a height of the first rectangular metal base plate is smaller than a quarter of a height of the isosceles-trapezoid cavity, a right end face of the first rectangular metal base plate is flush with the right end face of the isosceles-trapezoid cavity, a left end face of the first rectangular metal base plate is located in the second rectangular cavity, a length of the first rectangular metal base plate in the front-back direction of the first metal plate is greater than that of the first rectangular cavity and is smaller than that of the right end face of the isosceles-trapezoid cavity in the front-back direction of the first metal base plate, a distance between a front end face of the first rectangular metal base plate and a front end face of the second rectangular cavity is equal to a distance between the rear end face of the first rectangular metal base plate and a rear end face of the second rectangular cavity, a lower end face of the second rectangular metal ridge is attached to an upper end face of the first rectangular metal base plate, a right end face of the second rectangular metal ridge is flush with the left end face of the first rectangular metal ridge, an upper end face of the second rectangular metal ridge and an upper end face of the first rectangular metal ridge are located on the same plane, a length of the second rectangular metal ridge in the left-right direction of the first metal plate is not greater than a quarter of a length of the isosceles-trapezoid cavity in the left-right direction of the first metal plate; a first metal cylinder is arranged on the first rectangular metal base plate, a lower end face of the first metal cylinder is attached to the upper end face of the first rectangular metal base plate, a center of the first metal cylinder is located on a center line of the upper end face of the first rectangular metal base plate in the left-right direction of the first metal plate and is also located on the left end face of the isosceles-trapezoid cavity, a diameter of the first metal cylinder is smaller than a width of the first rectangular metal ridge and is greater than 0.5 mm, and a height of the first metal cylinder is smaller than a quarter of the height of the isosceles-trapezoid cavity; a first rectangular metal baffle is arranged in the second rectangular cavity, a right end face of the first rectangular metal baffle is flush with the left end face of the first rectangular metal base plate, a left end face of the first rectangular metal baffle is flush with the left end face of the second rectangular cavity, a length of the first rectangular metal baffle in the front-back direction of the first metal plate is smaller than that of the first rectangular metal base plate in the front-back direction of the first metal plate and is greater than that of the first rectangular metal ridge in the front-back direction of the first metal plate, the length of the first rectangular metal baffle in the left-right direction of the first metal pla

Assignees

• Univ Ningbo

Inventors

• You Qingchun
• Huang Jifu
• Qin Liting
• You Yang

Classifications

• H01P1/16

  for mode selection, e.g. mode suppression or mode promotion; for mode conversion · CPC title

• H01P5/024

  between hollow waveguides · CPC title

• H01P5/16

  Conjugate devices, i.e. devices having at least one port decoupled from one other port · CPC title

• H01Q5/25 Primary

  Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems · CPC title

• H01Q21/0006

  Particular feeding systems · CPC title