Aircraft mounted mast for multiple antennae

Claim 2

An antenna mast comprising: a housing having an upright portion and a base portion adapted to be secured to the skin of an aircraft; a plurality of electrical connectors carried by said base portion; a plurality of antenna circuits enclosed in said upright portion and electrically connected to one of said connectors; a plurality of vertically spaced elongated antenna elements projecting outwardly and rearwardly from opposite sides of the upright portion of said housing, one of the antenna elements on each side of the upright portion of said housing being electrically connected to the same one of said antenna circuits to form a dipole antenna; one of said antenna circuits including a helically wound transformer with a primary and secondary winding, the primary winding thereof connected to one of said connectors by a capacitor and the secondary winding thereof connected to said dipole antenna with a capacitor connected across said secondary winding; and means for electromagnetically isolating said antenna circuits within said housing, said means comprising folded wire turns physically proportioned to prevent resonance of said antenna circuit.

Claim 3

An antenna mast comprising: a housing having a upright portion and a base portion adapted to be secured to the skin of an aircraft, a plurality of electrical connectors carried by said base portion, a plurality of antenna circuits enclosed in said upright portion, each of said circuits electrically connected to one of said connectors and including impedance matching means, a plurality of pairs of vertically spaced elongated antenna elements, the antenna elements of each of said pairs projecting outwardly and rearwardly from opposite sides of the upright position of said housing and electrically connected to the same antenna circuit to form dipoles, an elongated antenna element extending rearwardly from the upper extremity of the upright portion of said housing and electrically connected to one of said connectors through one of said antenna circuit, and means for electromagnetically isolating said antenna circuits within said housing.

Claim 4

An antenna mast comprising: a housing having a upright portion and a base portion adapted to be secured to the skin of an aircraft, a plurality of electrical connectors carried by said base portion, a plurality of antenna circuits enclosed in said upright portion, each of said circuits electrically connected to one of said connectors and including impedance matching means, a plurality of pairs of vertically spaced elongated antenna elements, the antenna elements of each of said pairs projecting outwardly and rearwardly from opposite sides of the upright position of said housing and electrically connected to the same antenna circuit to form dipoles, an elongated antenna element extending rearwardly from the upper extremity of the upright portion of said housing and electrically connected to one of said connectors through one of said antenna circuit, and means for electromagnetically isolating said antenna circuits within said housing.

Claim 5

The antenna mast of claim 2 wherein the upright portion of said housing is an airfoil in cross section and includes a plurality of wing portions extending substantially normal thereto, each of said antenna elements being electrically connected to one of said antenna circuits through an electrical connector in one of said wings.

Claim 6

The antenna mast of claim 3 wherein said means for electromagnetically isolating said antenna circuits include a plurality of folded turns of an electrically conducting material, said folded turns being dimensionally proportioned to prevent the resonance of said antenna circuits, wherein said elongated antenna element extending rearwardly from the upper extremity of the upright portion of the housing is directly connected to one of the said connectors to form a VHF communications antenna, wherein a first pair of said dipoles are connected to one of said antenna circuits to function as an omnidirectional localizer antenna, and wherein a second pair of said dipoles are connected to another one of said antenna circuits to function as a glide slope antenna.

Claim 7

An aircraft antenna comprising: an electrically conducting baseplate adapted to be secured to the skin of an aircraft; an electrically insulative mounting member carried by said baseplate; an electrically insulative blade secured to said mounting member; a plurality of electrical circuits mounted on said blade; an electrically insulative airfoil housing encasing said mounting member, said blade, the electrical circuits carried by said blade, a portion of each of said elongated antenna elements and a portion of said baseplate; means for electromagnetically isolating said antenna circuits within said housing comprisiNg folded wire turns physically proportioned to prevent resonance of said antenna circuit; a plurality of coaxial connectors carried by said baseplate, the outer conductor of each of said connectors being electrically connected to said baseplate; means electrically connecting each of said antenna circuits to the inner conductor of one of said connectors; a plurality of vertically spaced elongated antenna elements electrically connected in pairs to form dipoles, each of said pairs being connected to one of said antenna circuits, an elongated antenna element extending rearwardly from the upper extremity of the upright portion of said housing, said rearwardly extending antenna element being electrically connected through one of said antenna circuits to one of said connectors; and one of said antenna circuits including a helically wound transformer with a primary and secondary winding, the primary winding thereof connected to one of said connectors by a capacitor and connected to another of said connectors by another capacitor and the secondary winding thereof connected to said dipole antenna with a capacitor connected across said secondary winding.

Claim 8

An aircraft antenna comprising: an electrically conducting baseplate adapted to be secured to the skin of an aircraft; an electrically insulative mounting member carried by said baseplate; an electrically insulative blade secured to said mounting member; a plurality of electrical circuits mounted on said blade; an electrically insulative airfoil housing encasing said mounting member, said blade, the electrical circuits carried by said blade, a portion of each of said elongated antenna elements and a portion of said baseplate; means for electromagnetically isolating said antenna circuits within said housing comprisiNg folded wire turns physically proportioned to prevent resonance of said antenna circuit; a plurality of coaxial connectors carried by said baseplate, the outer conductor of each of said connectors being electrically connected to said baseplate; means electrically connecting each of said antenna circuits to the inner conductor of one of said connectors; a plurality of vertically spaced elongated antenna elements electrically connected in pairs to form dipoles, each of said pairs being connected to one of said antenna circuits, an elongated antenna element extending rearwardly from the upper extremity of the upright portion of said housing, said rearwardly extending antenna element being electrically connected through one of said antenna circuits to one of said connectors; and one of said antenna circuits including a helically wound transformer with a primary and secondary winding, the primary winding thereof connected to one of said connectors by a capacitor and connected to another of said connectors by another capacitor and the secondary winding thereof connected to said dipole antenna with a capacitor connected across said secondary winding.

Claim 9

An aircraft antenna mast comprising: an aerodynamic housing adapted to be secured to an aircraft; a communications antenna element extending rearwardly from the upper extremity of said housing; a first pair of dipoles extending rearwardly and outwardly from opposite sides of said housing; a second pair of dipoles extending rearwardly and outwardly from said housing on opposite sides thereof, said communication antenna and said pairs of dipoles being vertically spaced from each other; connector means carried by said housing; and circuit means electrically connecting said communication antenna and each of said pairs of dipoles to said connector means, said circuit means including means for electromagnetically decoupling said communication antenna and said pairs of dipoles from each other.

Claim 10

An aircraft antenna mast comprising: an aerodynamic housing adapted to be secured to an aircraft; a communications antenna element extending rearwardly from the upper extremity of said housing; a first pair of dipoles extending rearwardly and outwardly from opposite sides of said housing; a second pair of dipoles extending rearwardly and outwardly from said housing on opposite sides thereof, said communication antenna and said pairs of dipoles being vertically spaced from each other; connector means carried by said housing; and circuit means electrically connecting said communication antenna and each of said pairs of dipoles to said connector means, said circuit means including means for electromagnetically decoupling said communication antenna and said pairs of dipoles from each other.

Claim 11

The antenna of claim 6 wherein said housing includes wings extending from opposite sides thereof and wherein each of said dipoles is connected to said circuit means through one of said wings, one of said pairs of dipoles is adapted for use as an omnidirectional localizer antenna, and wherein the other of said pairs of dipoles is adapted for use as a glide slope antenna.

Claim 12

The antenna of claim 7 wherein said wings are comprised of a shock-absorbing material to thereby protect said circuit means from inadvertent damage, and wherein said decoupling means includes a plurality of folded wire turns electrically connected to the skin of the aircraft on which the antenna is mounted.