Array antenna

• US 6,784,835 B2
• Filed: 12/02/2002
• Issued: 08/31/2004
• Est. Priority Date: 12/03/2001
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Giuseppe, Abreu, Kohno, Ryuji
• Primary Examiner(s): Buczinski, Stephen C.
• Application Number:
  US10/307,725
• Publication Number:
  US 20030179136A1
• Time in Patent Office: 638 Days
• Field of Search: 342/360, 342/368, 342/372
• US Class Current: 342/360
• CPC Class Codes: H01Q 21/08 the units being spaced along or adjacent to a rectilinear path waveguide fed H01Q21/0037
• CPC Class Codes: H01Q 21/205 providing an omnidirectional coverage turnstile aerials H01Q21/26
• CPC Class Codes: H01Q 21/22 Antenna units of the array energised non-uniformly in amplitude or phase, e.g. tapered array or binomial array

Abstract

An array antenna comprising a plurality of antenna elements, multipliers for multiplying coefficients with transmission or reception signal and a calculator for calculating the coefficients for each multiplier. The calculator generates the coefficients in a proposed method such that the beampattern of the array antenna has a flat top mainlobe with an adjustable beamwidth and a predetermined sidelobe ratio.

Claims

1. An array antenna comprising:

a plurality of antenna elements,

a calculation means for calculating excitation coefficients for each said antenna element in a way such that said antenna elements form a beampattern having a flat top mainlobe of adjustable beamwidth and a predetermined sidelobe level.

2. An array antenna as set forth in claim 1, wherein said antenna elements form a uniform linear array.

3. An array antenna as set forth in claim 1, wherein said antenna elements form a uniform circular array.