(19)
(11) EP 0 688 062 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.05.1996 Bulletin 1996/20

(43) Date of publication A2:
20.12.1995 Bulletin 1995/51

(21) Application number: 95201485.0

(22) Date of filing: 06.06.1995
(51) International Patent Classification (IPC)6: H01Q 19/06
(84) Designated Contracting States:
DE FR GB NL SE

(30) Priority: 15.06.1994 NL 9400974

(71) Applicant: HOLLANDSE SIGNAALAPPARATEN B.V.
NL-7554 RR Hengelo (NL)

(72) Inventor:
  • Reits, Bernard Jozef
    7555 GW Hengelo (NL)


(56) References cited: : 
   
       


    (54) Adjustable fresnel zone plate


    (57) The invention relates to a reflective Fresnel zone plate for concentrating microwaves into a focal point. The Fresnel zone plate consists of a large number of mechanically adjustable subreflectors (4) each having two possible positions. The subreflectors constitute a first set of zones (1) and a second set of zones (2), with each zone construed for optimally contributing to the concentration of the microwaves.






    Search report