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    • 41. 发明专利
    • DE60014218D1
    • 2004-11-04
    • DE60014218
    • 2000-03-15
    • NORTHROP GRUMMAN CORP
    • CHANDLER CHARLES WEM MAKKALON
    • H01Q5/00H01Q5/30H01Q5/47H01Q13/02
    • A horn antenna is provided which is capable of operating at a plurality of separate frequencies while providing substantially equalized E and H-plane patterns for each of the separate frequencies. The antenna includes a coupling portion to permit coupling to a communication device. An inner portion is coupled to the coupling portion, and includes a first choke having a depth which extends substantially parallel to a central longitudinal axis of the antenna and a width which extends in a radial direction of the antenna. The depth and the width of the first choke are set so that the first choke will operate at the first frequency. An outer portion is coupled to the inner portion, wherein the outer portion has a maximum diameter in the radial direction which is greater than the maximum diameter in the radial direction of the inner portion. The outer portion includes a second choke which also has a depth to extend substantially parallel to the central longitudinal axis of the antenna, and a width which extends in the radial direction. The depth and the width of the second choke are greater than the depth and the width of the first choke, and are set so that the second choke will operate at the second frequency. By virtue of the fact that the depths of the chokes extend in a direction substantially parallel to the longitudinal axis of the horn, the maximum electrical aperture of the antenna can be very close in size to the maximum physical diameter.
    • 44. 发明专利
    • DUAL DEPTH APERTURE CHOKES FOR DUAL FREQUENCY HORN EQUALIZING E AND H-PLANE PATTERNS
    • CA2300674A1
    • 2000-09-16
    • CA2300674
    • 2000-03-14
    • TRW INC
    • EM MAKKALONCHANDLER CHARLES W
    • H01Q5/00H01Q5/30H01Q5/47H01Q13/02
    • A horn antenna is provided which is capable of operating at a plurality of separate frequencies while providing substantially equalized E and H-plane patterns for each of the separate frequencies. The antenna includes a coupling portion to permit coupling to a communication device. An inner portion is coupled to the coupling portion, and includes a first choke having a depth which extends substantially parallel to a central longitudinal axis of the antenna and a width which extends in a radial direction of the antenna. The depth and the width of the first choke are set so that the first choke will operate at the first frequency. An outer portion is coupled to the inner portion, wherein the outer portion has a maximum diameter in the radial direction which is greater than the maximum diameter in the radial direction of the inner portion. The outer portion includes a second choke which also has a depth to extend substantially parallel to the central longitudinal axis of the antenna, and a width which extends in the radial direction. The depth and the width of the second choke are greater than the depth and the width of the first choke, and are set so that the second choke will operate at the second frequency. By virtue of the fact that the depths of the chokes extend in a direction substantially parallel to the longitudinal axis of the horn, the maximum electrical aperture of the antenna can be very close in size to the maximum physical diameter.
    • 48. 发明专利
    • Feed for dual band antenna
    • IL258216A
    • 2019-03-31
    • IL25821618
    • 2018-03-19
    • MTI WIRELESS EDGE LTD
    • H01P1/161H01Q5/47
    • A feed for a dual-band antenna, comprising:- a first waveguide for low frequency electromagnetic radiations,- a second dielectric waveguide for high frequency electromagnetic radiations,- an end connected to a low band port configured to pass said low frequency electromagnetic radiations, and a high band port configured to pass said high frequency electromagnetic radiations,wherein the first waveguide comprises a first longitudinal section and a second longitudinal section,wherein a minimal distance between an internal surface of walls of the first section and an external surface of walls of the second dielectric waveguide is Dalong a lateral direction orthogonal to the longitudinal direction, andwherein a maximal distance between an internal surface of at least one first wall of the second section and an external surface of a wall of the second dielectric waveguide facing said first wall is Dalong said lateral direction, wherein D