H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
351/30
H01Q 1/36 (2006.01) H01Q 13/02 (2006.01) H01Q 21/00 (2006.01) H01Q 21/24 (2006.01)
Patent
CA 1194219
ABSTRACT Antenna element for circularly polarized high- frequency signals comprising, in succession, a first insu- lating layer in which a miniature horn is provided which has a square cross-section and whose inside surface is metal-plated, a first supply network for signals whose direction of polarization is of a first type linear polarization, a second insulating layer in which a mini- ature waveguide is provided which has the same square cross-section at the side facing the first network and a rectangular cross-section at the other side, and whose inside surface is also metal-plated, a second supply net- work, for signals whose direction of polarization is per- pendicular to the polarization of the signals of the first network, and a third insulating layer in which a miniature waveguide is provided which has the same rectangular cross-section at the side facing the second network and which is short-circuited so that its length is less than the width of this third layer. This antenna is intended to be used in systems for receiving television signals transmitted by satellite.
423282
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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