ARRAY ANTENNA AND RADAR DEVICE

• Main Authors: OYABU HIROKAZU, FU YUFENG, YAMAURA SHINJI, KISHIMOTO SHUYA
• Format: Patent
• Language: English; Japanese
• Published: 03.04.2024
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRICITY; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

To avoid the occurrence of a grating lobe.SOLUTION: An antenna element is arranged so as to satisfy a condition 1 and a condition 2. The condition 1: the combination of a first straight line group formed of mutually-parallel straight lines and a second straight line group formed of mutually-parallel straight lines and straight lines intersecting the straight lines of the first straight line group at the position of the antenna element is defined such that the straight lines of the first straight line group and the straight lines of the second straight line group pass through the positions of the largest number of antenna elements, and the total of the number of line groups and the number of antenna elements not located on the line of the line group is equal to or greater than the number of observation objects L+1 when the straight lines included in the first straight line group and second straight line group are distributed to one or more line groups respectively formed of two or more straight lines intersecting with each other at the position of the antenna element. The condition 2: the second greatest common factor Dgcd_U and the fourth greatest common factor Dgcd_V for an interval of the antenna elements between the groups satisfy at least one of a formula (5) and a formula (6).SELECTED DRAWING: Figure 2 【課題】グレーティングローブの発生を回避する。【解決手段】条件１と条件２とを満たすようにアンテナ素子が配置されている。条件１：互いに平行な直線から構成される第１直線群と、互いに平行な直線から構成され、第１直線群の直線とアンテナ素子の位置で交差する直線から構成される第２直線群と、の組み合わせを、第１直線群の直線と第２直線群の直線とが最も多くのアンテナ素子の位置を通過するように規定し、第１直線群および第２直線群に含まれる直線を、アンテナ素子の位置で互いに交差する２以上の直線でそれぞれ構成される１以上の線群に振り分けたときに、線群の数と、線群の線上に位置していないアンテナ素子の数と、の合計が、観測対象の数Ｌ＋１以上である。条件２：グループ間のアンテナ素子の間隔についての第２最大公約数Ｄｇｃｄ＿Ｕおよび第４最大公約数Ｄｇｃｄ＿Ｖが、式（５）または式（６）の少なくとも一方を満たす。【選択図】図２