Omni-directional communications antenna having capacitively loaded top

Claim 2

In a communications antenna having a first vertical conductor, a pair of spaced apart conducting members suspended at their tops from said vertical conductor on opposite sides of said vertical conductor, said conducting members extending downwardly from a first horizontal level at their tops to a second horizontal level at their bottoms, said pair of conducting members being equal in length, means electrically connecting the bottoms of said pair of conducting members, a vertical conducting element electrically connected to one of said pair of conducting members and extending vertically upwardly from said first horizontal level and to an elevation equal to at least one-half the length of each of said conducting members, and transmission leads, one of which is electrically connected to said vertical conductor at said first level and to the top of the conducting member to which said vertical conducting element is electrically connected and a second of which is electrically connected to the other of said conducting members at the first horizontal level.

Claim 3

In the antenna of claim 1 in which said vertical conducting element comprises a vertical component about one-half the length of each of said conducting members and a horizontal component having a horizontal extent of about one-half the length of each of said conducting members.

Claim 4

In a communications antenna; a first conducting element projecting in a first direction from a first reference plane towards a second parallel reference plane, a pair of spaced apart elongate conducting members each supported at one of their respective ends on said conducting element and spaced substantially equidistantly from said conducting element, said conducting members extending from said first reference plane at their said one ends to said second generally parallel reference plane at their other ends, said pair of conducting members being substantially equal in length, means electrically connecting the said other ends of said pair of conducting members to each other, a projecting conductor electrically connected at said first reference plane to one of said pair of conducting members and extending in the direction away from said second reference plane a distance from said first reference plane that is equal to at least about one-half the length of said conducting members, and transmission lead means, one of which is electrically connected to said conducting element at said first plane and to the said one end of said one conducting member to which said projecting conductor is electrically connected, and the other of which is electrically connected to the other of said conducting members.

Claim 5

In a communications antenna; a first conducting element projecting in a first direction from a first reference plane towards a second parallel reference plane, a pair of spaced apart elongate conducting members each supported at one of their respective ends on said conducting element and spaced substantially equidistantly from said conducting element, said conducting members extending from said first reference plane at their said one ends to said second generally parallel reference plane at their other ends, said pair of conducting members being substantially equal in length, means electrically connecting the said other ends of said pair of conducting members to each other, a projecting conductor electrically connected at said first reference plane to one of said pair of conducting members and extending in the direction away from said second reference plane a distance from said first reference plane that is equal to at least about one-half the length of said conducting members, and transmission lead means, one of which is electrically connected to said conducting element at said first plane and to the said one end of said one conducting member to which said projecting conductor is electrically connected, and the other of which is electrically connected to the other of said conducting members.

Claim 6

In the antenna of claim 3 in which said first conducting element extends beyond said second reference plane a distance at least equal to about the distance between said first and second planes.

Claim 7

In the antenna of claim 3 in which said projecting conductor comprises a straIght section about one-half the length of said conducting members and capacitive loading means at the free end of said projecting conductor.

Claim 8

In the antenna of claim 3 in which said first conducting element is vertically oriented, and further embodying means for supporting said antenna in a vertical orientation.

Claim 9

In the antenna of claim 6 in which said first conducting element and said means for supporting said antenna in a vertical position are integrally formed as an electrically conductive elongate vertical boom member.

Claim 10

In a communications antenna comprising a first elongate conducting element projecting from a first reference plane toward a second parallel reference plane, a conductive loop generally parallel to said elongate conducting element and including opposite side sections disposed on opposite sides of said conducting element and a loop segment, said side sections extending between said first plane at one end of each side section and said second plane at the other end of each side section, at least one of said side sections being electrically coupled to said conducting element at said first plane, said loop segment electrically connecting the other ends of said pair of side sections at said second plane, a projecting conductor electrically connected to said one side section and extending from said first plane away from said second plane a distance equal to at least about one-half the length of each of said side sections, and transmission lead means comprising a first lead electrically coupled to said conducting element, the conductive loop and the projecting conductor in said first plane, and a second lead connected to the other of said side sections.

Claim 11

In a communications antenna comprising a first elongate conducting element projecting from a first reference plane toward a second parallel reference plane, a conductive loop generally parallel to said elongate conducting element and including opposite side sections disposed on opposite sides of said conducting element and a loop segment, said side sections extending between said first plane at one end of each side section and said second plane at the other end of each side section, at least one of said side sections being electrically coupled to said conducting element at said first plane, said loop segment electrically connecting the other ends of said pair of side sections at said second plane, a projecting conductor electrically connected to said one side section and extending from said first plane away from said second plane a distance equal to at least about one-half the length of each of said side sections, and transmission lead means comprising a first lead electrically coupled to said conducting element, the conductive loop and the projecting conductor in said first plane, and a second lead connected to the other of said side sections.

Claim 12

In the communications antenna of claim 8, wherein the conductive loop is an open loop.

Claim 13

In the communications antenna of claim 8, wherein the first conducting element is straight and said conductive loop side sections lie along a surface of revolution generated about the axis of said first conducting element.

Claim 14

In the communications antenna of claim 8, wherein said second lead is connected to said other side section at said first plane.

Claim 15

In the communications antenna of claim 8, wherein said first conducting element is vertically oriented and comprises an electrically conductive boom member extending below said second plane a distance equal to at least about the lengths of said side sections.

Claim 16

In the communications antenna of claim 8, wherein said side sections are generally concentric about a straight first conducting element and flare outwardly of said first conducting element from said first plane to said second plane.

Claim 17

In the communications antenna of claim 8, wherein said first conducting element is straight and said side sections are substantially straight and substantially equidistantly and oppositely spaced from said first conducting element.