公开(公告)号：US20230045598A1

公开(公告)日：2023-02-09

申请号：US17784246

申请日：2020-06-04

Applicant: JAPAN AEROSPACE EXPLORATION AGENCY

Inventor： Takashi MAEDA ,  Naoya TOMII ,  Akihisa UEMATSU ,  Kazuya INAOKA ,  Noriyuki KAWAGUCHI

IPC: H01Q3/26 ,  G01R29/08

Abstract: A phased-array antenna device with a long operating life without mechanical parts, has a high spatial resolution, and realizes microwave observation of broadband and highfrequency resolution. The phased-array antenna device performs direct A/D conversion through a BPF on an antenna analog signal amplified by an amplifier. Then, the device performs a second cross-spectrum calculation after conversion into complex frequency data through FFT. To detect a weak electromagnetic wave, the device repeatedly performs a second FFT over a long period and lastly performs integration.