(19)
(11) EP 0 371 480 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.04.1991 Bulletin 1991/16

(43) Date of publication A2:
06.06.1990 Bulletin 1990/23

(21) Application number: 89122005.5

(22) Date of filing: 29.11.1989
(51) International Patent Classification (IPC)5: H01J 25/48
(84) Designated Contracting States:
DE FR GB NL SE

(30) Priority: 30.11.1988 IT 6806588

(71) Applicant: CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A.
I-10148 Turin (IT)

(72) Inventor:
  • Grego, Giorgio
    Venaria (Torino) (IT)

(74) Representative: Riederer Freiherr von Paar zu Schönau, Anton et al
Van der Werth, Lederer & Riederer Postfach 2664
84010 Landshut
84010 Landshut (DE)


(56) References cited: : 
   
       


    (54) A device for generating and/or detecting electromagnetic fields


    (57) The device comprises a source (1) of electrically charged elementary particles, emitting a beam (2) of particles which is split into two partial beams (4, 5) sent onto different paths. A difference in velocity and hence in wavelength is generated between the two partial beams. The two partial beams are recombined into a single beam (14) and their beat is detected as an electrical signal. The velocity difference can be generated by a voltage generator (6b) or by the output voltage of an antenna.







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