公开(公告)号：US11069965B2

公开(公告)日：2021-07-20

申请号：US16626541

申请日：2018-01-31

Applicant: SOUTHEAST UNIVERSITY

Inventor： Haiming Wang ,  Qi Wu ,  Jiexi Yin ,  Chen Yu ,  Wei Hong

IPC: H01Q1/38 ,  H01Q1/48 ,  H01Q1/50 ,  H01Q21/24

Abstract: A low-profile broadband circularly-polarized array antenna based on stacked traveling wave antenna elements, includes: a circularly-polarized antenna element composed of three segments connected in an end-to-end manner of metal layers printed on two sides of a dielectric slab and a metallized via connecting two layers; a 2×2 antenna sub-array composed of a metallized via cavity and four antenna elements; a 16-way full-parallel feeding network composed of the metallized vias; slots for coupled feeding between feeding layers and metal cavities and the antenna; and a switching structure for testing between a grounded coplanar waveguide (GCPW) and a substrate integrated waveguide (SIW). An antenna array designed can be manufactured by using a printed circuit board process. The antenna array can realize circularly polarized radiation in a very broad frequency band.

公开(公告)号：US11943080B2

公开(公告)日：2024-03-26

申请号：US17611179

申请日：2021-03-17

Applicant: Southeast University

Inventor： Haiming Wang ,  Bensheng Yang ,  Peize Zhang ,  Chen Yu ,  Wei Hong

IPC: H04L12/50 ,  H04L25/02

CPC classification number: H04L25/0204

Abstract: Disclosed is a method for estimating dense multipath parameters by means of multipolarized broadband extended array responses, which includes: first transmitting multiple different transmitted signal sequences via a multipolarized antenna array, and processing received data in multiple snapshots according to the known transmitted signals, to obtain channel responses of multipolarized antenna components at all frequency points in a frequency band; extending the obtained channel response matrixes of multiple frequency points in multiple snapshots into a large two-dimensional channel response matrix; then, acquiring a delay parameter regarding multipath propagation by using a reference array element, and estimating two-dimensional departure and arrival angles by using a channel matrix subjected to frequency domain smoothing and dimensionality reduction; and afterwards, pairing the estimated departure and arrival angles, and estimating parameters such as the cross-polarization ratios, the initial phases, and the amplitudes of the sub-paths by using the estimated parameters.