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.

公开(公告)号：US20210223116A1

公开(公告)日：2021-07-22

申请号：US16932905

申请日：2020-07-20

Applicant: JAPAN AEROSPACE EXPLORATION AGENCY

Inventor： Takashi MAEDA ,  Naoya TOMII

IPC: G01K11/00 ,  G01N22/00

Abstract: To provide a measurement data processing device that can improve resolution by applying a correction operation to low-resolution microwave radiometer output data.
A measurement data processing device is capable of improving resolution by multiplying a measurement data group of a microwave radiometer by a weighted vector and adding up the measurement data group. The weighted vector solves an inverse problem based on a mathematical model for forming the sensitivity of an antenna as a Gaussian curved surface. Optimization is applied by repeatedly executing, outside an xy coordinate of a target antenna sensitivity distribution function table, a correction operation for minimizing integrated values of a positive remainder sensitivity function, which is data having a positive value a negative remainder sensitivity function, which is data having a negative value.