Title:
リフレクトアレー及び設計方法
Document Type and Number:
Japanese Patent JP5410559
Kind Code:
B2
Abstract:
A reflectarray that reflects an incident wave in a desired direction is such that a plurality of elements is disposed on a substrate having a surface which is perpendicular to a predetermined axis. A method of designing the reflectarray obtains a reflection phase of the elements as a function of a design parameter, when a radio wave enters the elements which are arranged, and stores a relationship between the reflection phase and the design parameter in a memory, wherein any of the design parameter among a size of element spacing, a size of a patch of the element, and a size of a gap between the patches of the neighboring elements is equally set for the elements. The method repeatedly determines, for each of the elements, the design parameter of a specific element in accordance with the relationship. The function of the design parameter has a range which is substantially equal to 360 degrees with respect to a predetermined numerical range of the design parameter, wherein the reflection phase is the continuously varying function with respect to the element spacing, and wherein the function is a continuous function (which indicates a two resonance characteristic) such that two resonant points (the element spacing which causes resonance) occur at which the reflection phase becomes zero.
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Inventors:
Tamami Maruyama
Yasuhiro Oda
Hidetoshi Kayama
Trunk Kuhao
Settlement Yun
Yasuhiro Oda
Hidetoshi Kayama
Trunk Kuhao
Settlement Yun
Application Number:
JP2012044864A
Publication Date:
February 05, 2014
Filing Date:
February 29, 2012
Export Citation:
Assignee:
Ntt docomo, Inc.
International Classes:
H01Q19/10; H01Q15/14
Domestic Patent References:
| JP2009207078A | ||||
| JP2011019021A |
Attorney, Agent or Firm:
Tadahiko Ito