(19)
(11) EP 0 312 989 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.07.1990 Bulletin 1990/27

(43) Date of publication A2:
26.04.1989 Bulletin 1989/17

(21) Application number: 88117340.5

(22) Date of filing: 18.10.1988
(51) International Patent Classification (IPC)4: H01Q 21/06
(84) Designated Contracting States:
DE FR GB IT NL SE

(30) Priority: 19.10.1987 JP 263157/87
27.10.1987 JP 270757/87
27.11.1987 JP 299416/87
30.11.1987 JP 301917/87
10.08.1988 JP 199513/88

(71) Applicant: SONY CORPORATION
Tokyo 141 (JP)

(72) Inventors:
  • Otsuka, Takashi
    Shinagawa-ku Tokyo (JP)
  • Kajikuri, Junichi
    Shinagawa-ku Tokyo (JP)

(74) Representative: Schmidt-Evers, Jürgen, Dipl.-Ing. et al
Patentanwälte Mitscherlich & Partner, Postfach 33 06 09
80066 München
80066 München (DE)


(56) References cited: : 
   
       


    (54) Microwave antenna structure


    (57) A suspended line feed type planar antenna has a substrate (3) sandwiched between a top plate (2) and a bottom plate (1), in which a number of protrusions (31, 30) are formed on the top plate (2) and the bottom plate (1) at a plurality of corresponding positions by deforming the top plate (2) and the bottom plate (1) by means of a press-process or press-treatment, so that the substrate (3) is supported by the protrusions (31, 30).







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