Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1999-01-02
2000-10-03
Le, Hoanganh
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343821, 343793, 455293, H01Q 916
Patent
active
061279862
ABSTRACT:
The present invention discloses an integrated dipole antenna and down converter apparatus. The integrated dipole antenna and down converter apparatus includes a dipole antenna for receiving microwave signals therein. The integrated dipole antenna and down converter apparatus further includes a down converter for receiving processed signals of the microwave signals from the dipole antenna for converting the processed signals to signals of lower frequency. The down converter includes main plate for supporting a tunable mechanical filter. The down converter further includes a tunable semi-mechanical filter supported on the plate. The semi-mechanical filter includes an upper circuit assembly and an identically symmetrical lower circuit assembly for canceling electromagnetic waves transmitting in the upper and lower circuit assemblies and the main plate whereby signal filtering efficiency is improved by reducing signal dissipation in the upper and lower circuit assemblies. In a preferred embodiment, the integrated dipole antenna and down converter apparatus further includes a housing for containing the down converter. The housing and the upper and lower circuit assemblies defining an upper and a lower space for storing energy of the electromagnetic waves therein thus reducing signal dissipation in the upper and lower circuit assemblies. In another preferred embodiment, the semi-mechanical filter further includes a capacitance tuning means, which includes a set of four screws. The capacitance tuning means further includes rubber tuning means and TEFLON spring means for allowing flexible adjustment of a distance from the upper circuit assembly and the bottom circuit assembly to the surface of the container housing.
REFERENCES:
patent: 5523768 (1996-06-01), Hemmie et al.
patent: 5982336 (1996-06-01), Wen et al.
Chien Shun-Yu
Wang Feng-Jen
Wen Charles
Le Hoang-anh
Lin Bo-In
Transystem, Inc.
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