Vhf omni-range navigation system antenna

Details Vhf omni-range navigation system antenna Vhf omni-range navigation system antenna

H - Electricity

01

Q

343/101, 351/19,

H01Q 3/36 (2006.01) H01Q 13/10 (2006.01) H01Q 13/18 (2006.01) H01Q 21/20 (2006.01)

Patent

CA 1166743

VHF OMNI-RANGE NAVIGATION SYSTEM ANTENNA ABSTRACT OF THE DISCLOSURE An antenna which is suitable for use in a very high frequency omni-directional range (VOR) navigation system for aircraft. The antenna is driven to radiate reference and variable phase signals which provide flight bearing information to an aircraft which enters the radiated field. The antenna comprises a cylindrical radiator which is formed with four orthogonally disposed longitudinally extending slots, and each slot is backed by a separate cavity which extends into the cylinder. Each cavity has an effective depth which is greater than the radial or, more usually, the diametral dimension of the cylinder, and all four cavities are configured so as to locate wholly within the cylinder.

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