Global Patent Index - EP 0195356 A3

EP 0195356 A3 19871021 - L-BAND ANTENNA FOR MOBILE SATELLITE BROADCASTING

Title (en)

L-BAND ANTENNA FOR MOBILE SATELLITE BROADCASTING

Publication

EP 0195356 A3 19871021 (DE)

Application

EP 86103264 A 19860311

Priority

DE 3508929 A 19850313

Abstract (en)

[origin: EP0195356A2] A slotted tube antenna is arranged vertically with respect to a highly conductive reflective plane to produce a conical, substantially circular-polarised polar diagram for a mobile L-band satellite radio; in this case, the cylindrical antenna tube, which is arranged vertically with respect to the reflective plane and has a specific length, is excited as a vertically polarised linear emitter, while at the same time, but separately therefrom, a longitudinal slot of predetermined length designed in the cylindrical antenna tube is excited as a horizontally polarised dipole at a specific height above the reflective plane. By suitable dimensioning of the antenna tube and of the slot designed therein, and by suitable arrangement of the antennal centre of gravity above the highly conductive reflective plane, an overall circular-polarised emitter is produced having an optimum radiation characteristic for mobile satellite radio, with a circular polar diagram in the azimuth plane and a beam in the elevation plane with maximum radiation of the main lobe at an elevation angle of approximately 30 DEG , which is satisfactory, for example, for the conditions in Europe. <IMAGE>

IPC 1-7

H01Q 9/30; H01Q 13/12; H01Q 21/24

IPC 8 full level

H01Q 9/30 (2006.01); H01Q 13/12 (2006.01); H01Q 21/24 (2006.01)

CPC (source: EP)

H01Q 9/30 (2013.01); H01Q 13/12 (2013.01); H01Q 21/24 (2013.01)

Citation (search report)

  • [Y] US 2611867 A 19520923 - ANDREW ALFORD
  • [A] US 2727232 A 19551213 - PRYGA STANLEY A
  • [Y] ELECTRONICS, September 1948, Seiten 103-107, McGraw-Hill Inc., New York, US; C.E. SMITH et al.: "Circular polarization in F-M broadcasting"
  • [A] IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, Band AP22N23, Mai 1974, Seiten 477-479, IEEE, New York, US; K.A. AL-BADWAIHY et al.: "Hemispherically capped thick cylindrical monopole with a conical feed section"
  • [A] SEG-NACHRICHTEN, Heft 3, 1955, Seiten 131-137, DE; W. CRONE: "Rundfunksendeantennen"

Designated contracting state (EPC)

DE FR GB IT NL

DOCDB simple family (publication)

EP 0195356 A2 19860924; EP 0195356 A3 19871021; EP 0195356 B1 19901122; DE 3508929 A1 19861023; DE 3508929 C2 19870129; DE 3675669 D1 19910103

DOCDB simple family (application)

EP 86103264 A 19860311; DE 3508929 A 19850313; DE 3675669 T 19860311