IP Library Granted Patent US 12,476,363
Granted Patent B2
US 12,476,363 · App. 18/290,806 · Granted Nov 18, 2025

Reflection characteristic analysis device, reflection characteristic analysis method, and reflection characteristic analysis program

Inventors: Riku Omiya (Musashino, JP); Masashi Iwabuchi (Musashino, JP); Tomoaki Ogawa (Musashino, JP); Yasushi Takatori (Musashino, JP)
Assignee: NTT, Inc.
H01Q3/46
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Quick Facts
Patent No.
US 12,476,363
App. No.
18/290,806
Granted
Nov 18, 2025
Kind
B2
Abstract

A reflection characteristic analysis device analyzes reflection characteristics of a reconfigurable intelligent surface (RIS: Reconfigurable Intelligent Surface). The reflection characteristic analysis device includes a ray trace calculation unit and an electromagnetic field analysis unit. The ray trace calculation unit calculates an incident angle of an electromagnetic wave incident on the reconfigurable intelligent surface by a ray-tracing method. The electromagnetic field analysis unit acquires the incident angle calculated by the ray trace calculation unit, and calculates, based on an electromagnetic field analysis, the reflection characteristics obtained when the electromagnetic wave enters the reconfigurable intelligent surface at the incident angle.

Claims (18)

1 . A reflection characteristic analysis device for analyzing reflection characteristics of a reconfigurable intelligent surface, the reflection characteristic analysis device comprising:

processing circuitry configured to execute:

first processing that calculates an incident angle of an electromagnetic wave incident on the reconfigurable intelligent surface by a ray-tracing method; and

second processing that acquires the incident angle calculated by the first processing and calculates, based on an electromagnetic field analysis, the reflection characteristics obtained when the electromagnetic wave enters the reconfigurable intelligent surface at the incident angle.

2 . The reflection characteristic analysis device according to claim 1 , further comprising:

one or more storage devices configured to store the incident angle calculated by the first processing,

wherein in the second processing, the processing circuitry acquires the incident angle stored in the one or more storage devices to calculate the reflection characteristics.

3 . The reflection characteristic analysis device according to claim 1 , wherein:

the processing circuitry is further configured to calculate radio wave propagation characteristics in an environment including the reconfigurable intelligent surface by a ray-tracing method, based on the reflection characteristics calculated by the second processing.

4 . A reflection characteristic analysis method for analyzing reflection characteristics of a reconfigurable intelligent surface, the reflection characteristic analysis method comprising:

first processing that calculates an incident angle of an electromagnetic wave incident on the reconfigurable intelligent surface by a ray-tracing method; and

second processing that acquires the incident angle calculated by the first processing and calculates, based on an electromagnetic field analysis, the reflection characteristics obtained when the electromagnetic wave enters the reconfigurable intelligent surface at the incident angle.

5 . The reflection characteristic analysis method according to claim 4 , further comprising:

storing the incident angle calculated by the first processing in one or more storage devices,

wherein the second processing includes acquiring the incident angle stored in the one or more storage devices to calculate the reflection characteristics.

6 . A non-transitory computer-readable recording medium storing a reflection characteristic analysis program for analyzing reflection characteristics of a reconfigurable intelligent surface, the reflection characteristic analysis program, when executed by a computer, causing the computer to execute:

first processing that calculates an incident angle of an electromagnetic wave incident on the reconfigurable intelligent surface by a ray-tracing method; and

second processing that acquires the incident angle calculated by the first processing and calculates, based on an electromagnetic field analysis, the reflection characteristics obtained when the electromagnetic wave enters the reconfigurable intelligent surface at the incident angle.

Assignments (2)
CHANGE OF NAME Recorded Aug 21, 2025
From: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
To: NTT, INC.
Reel/Frame 072499/0774 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 22, 2024
From: OMIYA, RIKU; IWABUCHI, MASASHI; OGAWA, TOMOAKI; TAKATORI, YASUSHI
To: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Reel/Frame 066192/0243 →
Continuity (1)
Related Publication 20250096463A1 · Mar 20, 2025
References Cited (7)
US 8285219B2 · Sato · 2012 [cited by examiner]
US 20080077367A1 · Odajima · 2008 [cited by examiner]
US 20100291878A1 · Sato et al. · 2010 [cited by applicant]
US 20220021125A1 · Baligh · 2022 [cited by examiner]
JP 2010268254A · 2010 [cited by applicant]
“Verification of pyramidal absorber, electromagnetic anechoic chamber analysis of ray-tracing method by searching for optimal reflection point of 3GHz pyramidal absorber”, Kozo Keikaku Engineering Co., Ltd., Available O… [cited by applicant]
Sarkar et al., “An Electromagnetic Framework for the Deployment of Reconfigurable Intelligent Surfaces to Control Massive MIMO Channel Characteristics”, 2020 14th European Conference on Antennas and Propagation (EuCAP),… [cited by applicant]
Cited By (1)
US 12,665,632