A Double Hole Coprime Array Antenna Structure

An array antenna and antenna structure technology, applied in the field of dual-hole coprime array antenna structure, can solve problems such as loss of degrees of freedom, reduce the number of antenna elements, improve angle estimation performance and spatial resolution, and have flexible and simple antenna layouts. Effect

Active Publication Date: 2021-07-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the difference co-array (Difference co-array) produced by the existing coprime array (Difference co-array), that is, the virtual array, the existing holes lead to a lot of loss of available degrees of freedom

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Double Hole Coprime Array Antenna Structure
  • A Double Hole Coprime Array Antenna Structure
  • A Double Hole Coprime Array Antenna Structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention is described in further detail now in conjunction with accompanying drawing.

[0023] The invention discloses a Coprime array with a two-hole difference co-array (CATHDC) antenna structure. The structure is composed of four sparse sub-arrays, the total number of array elements is T, and the number of antennas is N, and M, wherein N and M=3 are coprime integers, M in and d≤λ / 2 is the unit array element spacing, λ is the carrier wavelength,

[0024] Table 1 shows the parameters of the relevant sparse array structure required by this patent, including array layout, continuous DOF ​​(uDOF), weight function w(1), w(2), w(3) and coupling rate, where TCA represents de Redundant coprime array (thinned coprime array), kECA is k-time extended coprime array (k-time extended coprime array), CCA is complementary coprime array (complementary coprime array), NA is two-level nested array (nested array) ), SNA2 is a 2-order super nested array (2-order sup...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A dual-hole coprime array antenna structure is composed of four sparse subarrays, the total number of array elements is T, and the number of antennas are N and M respectively, wherein N and M are coprime integers, and M<N. The position of the array elements in the CATHDC antenna structure is where d≤λ / 2 is the unit array element spacing, and λ is the carrier wavelength. The antenna structure of the present invention expands the antenna aperture and weakens the mutual coupling effect. The antenna array layout is simple and can Gain more degrees of freedom than existing coprime arrays. The virtual array generated by CATHDC is a uniform array with unit element spacing, and the classical signal angle of arrival estimation algorithm combined with the spatial smoothing method can be directly applied without angle ambiguity.

Description

technical field [0001] The invention belongs to the field of array antenna layout, and in particular relates to a dual-hole coprime array antenna structure. Background technique [0002] The traditional antenna layout is limited by the half-wavelength, that is, the distance between the array elements is smaller than half-wavelength. Therefore, when the number of antennas is fixed, the aperture of the antenna is limited. At the same time, small array elements will also lead to a strong mutual coupling effect between antenna elements. In addition, the number of targets that can be identified by traditional DOA estimation algorithms is limited by the number of antenna elements in the physical array, that is, degrees of freedom. When the number of targets exceeds the number of antenna elements, many algorithms will fail. [0003] At present, a kind of antenna structure layout called coprime array has received extensive attention. Its element spacing breaks through the half-wav...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/00H01Q1/36H01Q3/00H01Q3/02
CPCH01Q1/36H01Q3/005H01Q3/02H01Q21/00
Inventor 郑旺张小飞李建峰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap