Stacked dual dipole MMDS feed

An antenna for use in the frequency range of 2000 to 3000 MHz, said antenna comprising:

• a board having conductive material formed on first and second sides thereof,
• two dipoles stacked on said board, each of said dipoles having a first one-half element etched in said conductive material on said first side of said board and a second one-half element etched in said conductive material on the second side of said board, said dipoles being oriented to combine polarized signals in phase with each other and to further combine non-polarized signals out of phase with each other,
• a first conductive trace interconnecting said first one-half elements of said two dipoles together, said first conductive trace being etched in said conductive material on said first side along the centerline of said antenna,
• a first circular conductive pad etched in said conductive material on said first conductive trace at a mid-point between said two dipoles on said first side,
• a second conductive trace interconnecting said second one-half elements of said two dipoles together, said second conductive trace being etched in said conductive material on said second side along said centerline,
• a second circular conductive pad etched in said conductive material as part of said second conductive trace directly opposing said first circular conductive pad,
• a hold formed through the center of said first circular conductive pad, said board, and the center of said second circular conductive pad,
• means connected to said first and second circular conductive pads for feeding said signals polarized signals, and
• means etched on said second conductive trace in said conductive material and connected between said second circular pad and each of said second one-half elements for combining phase the polarized signals from each of said dipoles, said combining means further matching the impedance of said two dipoles to the impedance of said feeding means, said two dipoles cooperating together to receive said channels in said frequency range.

A dipole feed for use in the frequency range of 2000 to 3000 HMz, said dipole feed comprising:

• a board having conductive material formed on first and second sides thereof,
• two 50 ohm balanced dipoles stacked on said board, each of said dipoles having a first one-half element etched in said conductive material on said first side of said board and a second one-half element etched in said conductive material on the second side of said board, each of said dipoles being oriented to output polarized signals in phase with each other and to further output non-polarized signals out of phase with each other, said dipoles being spaced from each other at a wavelength spacing in the range of about 0.25 lambda to about 0.40 lambda,
• a first conductive trace interconnecting said first one-half elements of said two dipoles together, said first conductive trace being etched in said conductive material along the centerline of said antenna on said first side,
• a first circular conductive pad etched in said conductive material on said first conductive trace at a mid-point between said two dipoles on said first side,
• a second conductive trace interconnecting said second one-half elements of said two dipoles together, said second conductive trace being etched in said conductive material along said centerline on said second side,
• a second circular conductive pad etched in said conductive material on said second conductive trace directly opposing said first circular conductive pad,
• a hole formed through the center of said first circular conductive pad, said board, and the center of said second circular conductive pad,
• means connected to said first circular pad and through said formed hole to said second circular pad for delivering said polarized signals from said dipoles, said two dipoles cooperating together to feed said channels in said frequency range.

An antenna responsive to signals in the S-band comprising:

• a reflector for reflecting said signals into a focal area,
• a board having conductive material on first and second sides thereof,
• a single stacked dual dipole feed having first and second one-half elements, said first one-half element etched on said first side and said second one-half element etched on said second side, of said board,
• a connector orthogonally connected to said board and electrically directly connected to said conductive material of said stacked dual dipole feed;
• means engaging said board for holding said stacked dual dipole feed in said focal area of said reflected signals,
• a sub-reflector having angled sides located above said single stacked dual dipole feed,
• means connected to said holding means for supporting said sub-reflector at a predetermined distance above said holding means, said feed responsive to said signals in said S-band.

An antenna responsive to signals in the S-band comprising:

• a reflector for reflecting said signals into a focal area,
• a board having conductive material on both sides thereof,
• a single stacked dual dipole feed having a pair of dipoles, said pair of dipoles being etched in said conductive material with one one-half of each dipole etched on one of said board,
• means for interconnecting said pair of dipoles together so as to place polarized signals in phase with each other and to place non-polarized signals out of phase so that the non-polarized signals have a null at 0.degree. and 180.degree.,
• a connector connected to said board and electrically connected to said interconnecting means,
• means engaging said board for holding said stacked dual dipole feed in said focal area of said reflected signals,
• a sub-reflector having angled sides located above said pair of dipoles,
• means connected to said holding means for supporting said sub-reflector at a predetermined distance above said holding means, said feed responsive to said signals in the said S-band.

A single stacked dual dipole feed responsive to signals in the S-band of 2,000 to 3,000 MHz, said single stacked dual dipole feed comprising:

• a thin board having conductive material on both sides thereof,
• a first portion of said feed formed in said conductive material on the front side of said board, said first portion having:
• (a) two opposing lower isosceles triangular shaped dipole half elements with the unequal sides extending outwardly on said front side from the centerline of said feed, wherein each of said lower isosceles triangular shaped dipole half elements has a length of about 1.2 inches and wherein each of said unequal sides equals about 0.4 inches, said lower half elements being spaced at a wavelength spacing in the range of about 0.25 lambda to about 0.40 lambda,
• (b) a front linear trace connecting the apexes of said two opposing lower dipole half elements along said centerline, said front linear trace having a width of about 0.15 inches and
• (c) an outer circular ring centrally disposed on said front trace between said apexes of said lower half elements, said outer circular ring having an outer diameter of about 0.5 inches,
• said board having a formed hole through said board, said formed hole being centrally located in said outer circular ring,
• a second portion of said feed formed in said conductive material on the rear side of said board, said second portion having:
• (a) two opposing upper isosceles triangular shaped half elements with the unequal sides extending outwardly on said rear side from said centerline of said feed, said opposing upper extending half elements being of the same dimension and spacing as said lower half elements,
• (b) a rear linear trace connecting the apexes of said two opposing upper dipole half elements, said rear trace being centrally positioned over said front linear trace along said centerline, said rear trace having a first thicker region connected to said second one-half element and a second thinner region connected to said first thicker region and wherein said first thicker region has a width of about 0.05 inches and wherein said second thinner region has a width of about 0.025 inches, and
• (c) an inner circular ring centrally disposed on said rear trace between said apexes of said upper half elements, said inner circular ring being centrally located over said formed hole and having an outer diameter of about 0.2 inches,
• (d) shunt capacitance located on opposing sides of said inner circular ring orthogonal to said rear trace,
• said first and second portions cooperating together to respond to said signals in said S-band, and
• means connected to said outer and inner circular rings for delivering said S-band signals.

A single stacked dual dipole feed responsive to signal in the S-band of 2,000 to 3,000 Mhz, said feed comprising:

• a thin board having conductive material on both sides thereof,
• a first portion of said feed formed with said conductive material on the front side of said board, said first portion having:
• (a) two opposing lower isosceles triangular shaped dipole half elements with the unequal sides extending outwardly on said front side from the centerline of said feed, wherein each of said lower isosceles triangular shaped dipole half elements has a length of about 1.2 inches and wherein each of said unequal sides equals about 0.4 inches,
• (b) a front linear trace connecting the apexes of said two opposing lower dipole half elements along said centerline, said front linear trace having a width of about 0.15 inches and
• (c) an outer circular ring centrally disposed on said front trace between said apexes of said lower half elements, said outer circular ring having an outer diameter of about 0.5 inches,
• said board having a formed hole through said board, said formed hole being centrally located in said outer circular ring,
• a second portion of said feed formed with said conductive material on the rear side of said board, said second portion having:
• (a) two opposing upper isosceles triangular shaped half elements with the unequal sides extending outwardly on said rear side from said centerline of said feed, said opposing upper extending half elements being of the same dimension as said lower half elements,
• (b) a rear linear trace connecting the apexes of said two opposing upper dipole half elements, said rear trace being centrally positioned over said front linear trace along said centerline, said rear trace having a first thicker region connected to said second one-half element and a second thinner region connected to said first thicker region, and
• (c) an inner circular ring centrally disposed on said rear trace between said apexes of said upper half elements, said inner circular ring being centrally located over said formed hole and having an outer diameter of about 0.2 inches,
• (d) shunt capacitance located on opposing sides of said inner circular ring orthogonal to said rear trace,
• said first and second portions cooperating together (i) to output polarized signals in phase with each other and (ii) to cancel non-polarized signals out of phase with each other from said signals in said S-band, and
• means connected through said hole to said outer and inner circular rings for delivering said S-band signals from said first and second portions.