Title:
MULTI-BEAM ANTENNA APPARATUS
Document Type and Number:
WIPO Patent Application WO/2010/087453
Kind Code:
A1
Abstract:
A multi-beam antenna apparatus which uses one antenna unit to achieve two independent multi-beam characteristics and improves gain. A flat antenna module is formed by stacking a first antenna part, a second antenna part, a first Rotman lens part, and a second Rotman lens part in this order. One multi-beam characteristic is achieved with the first antenna part and first Rotman lens part, and another independent multi-beam characteristic is achieved with the second antenna part and second Rotman lens part. When designing a Rotman lens, the shape that is decided for the Rotman lens is one which satisfies β<α, and further, the relational expression of η=(β/α) ⋅ (Ln/F)<1, and has a size (G) that is smaller than the size of a Rotman lens that is designed under the condition of β=α, where β is the beam forming angle and α is the angle between the center line (208) and the line which joins an intersection point (S2) to one of the plurality of input terminals.
Inventors:
OOTA MASAHIKO (JP)
NOMURA TAKETO (JP)
NOMURA TAKETO (JP)
Application Number:
PCT/JP2010/051273
Publication Date:
August 05, 2010
Filing Date:
January 29, 2010
Export Citation:
Assignee:
HITACHI CHEMICAL CO LTD (JP)
OOTA MASAHIKO (JP)
NOMURA TAKETO (JP)
OOTA MASAHIKO (JP)
NOMURA TAKETO (JP)
International Classes:
H01Q3/34; H01Q15/02; H01Q25/00
Foreign References:
| JP2000124727A | 2000-04-28 | |||
| JP2002523951A | 2002-07-30 | |||
| JPS5793701A | 1982-06-10 | |||
| JP2000124727A | 2000-04-28 | |||
| JPH05152843A | 1993-06-18 |
Other References:
See also references of EP 2393156A4
Attorney, Agent or Firm:
TSUJII Koichi et al. (JP)
辻居 Koichi (JP)
辻居 Koichi (JP)
Download PDF: