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1. WO2007094122 - CIRCULARLY POLARIZED ANTENNA

Publication Number WO/2007/094122
Publication Date 23.08.2007
International Application No. PCT/JP2006/325474
International Filing Date 21.12.2006
IPC
H01Q 7/00 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
7Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
H01Q 1/48 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
1Details of, or arrangements associated with, antennas
48Earthing means; Earth screens; Counterpoises
H01Q 13/08 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
13Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
08Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
CPC
H01Q 7/00
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
7Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
H01Q 9/0428
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
9Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
04Resonant antennas
0407Substantially flat resonant element parallel to ground plane, e.g. patch antenna
0428radiating a circular polarised wave
H01Q 9/0457
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
9Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
04Resonant antennas
0407Substantially flat resonant element parallel to ground plane, e.g. patch antenna
045with particular feeding means
0457electromagnetically coupled to the feed line
Applicants
  • ミツミ電機株式会社 MITSUMI ELECTRIC CO., LTD. [JP]/[JP] (AllExceptUS)
  • 中野 久松 NAKANO, Hisamatsu [JP]/[JP] (UsOnly)
  • 三好 明 MIYOSHI, Akira [JP]/[JP] (UsOnly)
  • 深江 公雄 FUKAE, Isao [JP]/[JP] (UsOnly)
Inventors
  • 中野 久松 NAKANO, Hisamatsu
  • 三好 明 MIYOSHI, Akira
  • 深江 公雄 FUKAE, Isao
Agents
  • 池田 憲保 IKEDA, Noriyasu
Priority Data
2006-03598514.02.2006JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) CIRCULARLY POLARIZED ANTENNA
(FR) ANTENNE A POLARISATION CIRCULAIRE
(JA) 円偏波アンテナ
Abstract
(EN)
A circularly polarizied antenna having a high gain in the zenith direction and ensuring a good axial ratio over a very wide range. The circularly polarizied antenna (10) has a planar loop antenna element (122), and a feeding means for feeding to the planar loop antenna element (122) four powers where phases are shifted by 90˚ from each other. The feeding means consists of four feeding probes (131-134). The circularly polarized antenna (10) has a circuit board (25) arranged in parallel with the planar loop antenna element (122). The circuit board (25) has an area larger than that of the planar loop antenna element (122). The circuit board (25) has a major surface (25U) which serves entirely as a ground plane. A 90˚ phase shifter is formed on the back side (25L) of the circuit board (25).
(FR)
La présente invention concerne une antenne à polarisation circulaire dotée d'un gain supérieur dans la direction de zénith et assurant un bon ratio axial sur une très large plage. L'antenne à polarisation circulaire (10) est dotée d'éléments d'antennes à boucles planaires (122), et de moyens d'alimentation destinés à alimenter l'élément d'antenne à boucles planaires (122) de quatre puissances lorsque les phases sont déplacées de 90° l'une de l'autre. Les moyens d'alimentation sont composés de quatre câbles d'amenée (131-134). L'antenne à polarisation circulaire (10) dispose d'une carte de circuit (22) disposée parallèlement à l'élément d'antenne à boucles planaires (122). La carte circuit (25) est dotée d'une zone plus grande que l'élément d'antenne à boucles planaires (122). La carte de circuit (25) possède une surface principale qui sert intégralement à titre de plan de sol. Un déphaseur de 90 est formé sur le verso (25L) de la carte de circuit (25).
(JA)
 非常に広範囲に亘って良好な軸比を得ることができ、天頂方向の利得が大きい円偏波アンテナを提供する。円偏波アンテナ(10)は、平面状ループアンテナ素子(122)と、この平面状ループアンテナ素子(122)に対して位相を90度ずつ変化させた4つの給電を行う給電手段とを有する。給電手段は、4本の給電プローブ(131~134)から成る。円偏波アンテナ(10)は、平面状ループアンテナ素子(122)と平行に配置された回路基板(25)を備える。回路基板(25)は平面状ループアンテナ素子(122)よりも大面積である。回路基板(25)の主面(25U)は全面がグランドプレーンである。回路基板(25)の裏面(25L)には90度位相シフタが形成されている。
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