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Integrated MMDS antenna and down converter
| Details |
Inventors: Hemmie, Dale L.; Mills, Marc D.;
Assignee: Confier Corporation (Burlington, IA)
Primary Examiner: Hille; Rolf
Assistant Examiner: Brown; Peter Toby
Attorney, Agent or Firm: Dorr, Carson, Sloan & Peterson
An integrated semi-parabolic antenna/down converter MMDS receiving system wherein the support boom of a semi-parabolic antenna contains the down converter electronics. Located at the focal area of the semi-parabolic antenna are a pair of driven feed elements which are directly connected to the printed circuit board carrying the down converter electronics. The down converter is formed in an elongated shape to fit entirely within the formed hollow interior of the support boom. The down converter comprises a first printed circuit board which contains an RF filter located at the input end of the printed circuit board. The input of the RF filter circuit is directly connected to the pair of driven feed elements by soldering the legs of the driven feed elements directly to the input of the RF filter stage on the first printed circuit board. The RF filter is surrounded by an input ground shield which covers the RF filter circuit. The shield is soldered to the top and bottom ground planes of the printed circuit board. At the opposite end of the printed circuit board is an output amplifier whose output is connected to a coax output lead. A coax ground shield engages the opposite end of the first printed circuit board in a perpendicular orientation so as to position the opposite end of the printed circuit board within the hollow interior. The reference oscillator for the down converter is mounted on a second printed circuit board which is spaced from the first printed circuit board and is oriented to have its bottom ground plane to be facing the bottom ground plane of the first printed circuit board. |
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DETAILED DESCRIPTION We claim: 1.
An integrated semi-parabolic antenna/down converter MMDS receiving system comprising: a semi-parabolic antenna, a pair of driven feed elements, each of said driven feed elements having a connection leg, a support boom formed of conductive material connected to said semi-parabolic antenna for holding said driven feed elements in the focal area of said semiparabolic antenna, said support boom having a formed hollow interior, a down converter formed in an elongated shape to fit entirely within said formed hollow interior of said support boom, said down converter at least comprising: (a) a first printed circuit board, said first printed circuit board having a top ground plane, a bottom ground plane, and an input end and an output end, (b) an RF filter having an input located on the input end of said first printed circuit board, the input of said RF filter being directly connected to said driven feed elements by soldering said connection legs of said driven feed elements directly to said input of said RF filter on said first printed circuit board, (c) an RF filter shield covering said RF filter and soldered to said top and bottom ground planes of said first printed circuit board, said RF filter shield having a plurality of conductive ground clips located thereon so as to firmly abut against the formed hollow interior of said support boom in order to (1) establish an electrical ground connection therewith and (2) position said first printed circuit board within said hollow interior, (d) said first printed circuit board having a conductive ground clip connected to said bottom ground plane to (1) establish a ground connection to said conductive material of said formed hollow interior of said support boom and (2) position said first printed circuit board within said hollow formed interior, (e) a second printed circuit board connected in spaced relation to said first printed circuit board, said second printed circuit board having a top ground plane and a bottom ground plane, said second printed circuit board having placed on said top ground plane a reference oscillator, said second printed circuit board having its bottom ground plane oriented to face the bottom ground plane of said first printed circuit board
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