| 摘要 |
An antenna/downconverter directed to the subscription television distribution industry having low cross polarization and broad bandwidth. The antenna/downconverter includes a director mounted to a housing which defines a reflector cup, side lobe suppression rim and a housing defining a chamber which provides environmental protection for downconverter electronics. Received microwave energy is coupled to the downconverter electronics from a point radially inward from the perimeter of a first receive disc axially spaced within the reflector cup using a probe surrounded by a conductive probe shield integral to the reflector cup. A second receive disc having a different radius than the first receive disc and axially spaced within the reflector cup is parasitically coupled to the first probe. The second receive disc additionally includes wings coupled to the perimeter of the reflector cup for shunting cross-polarized microwave signals. The housing defines a plurality of pairs of jaws which facilitate alignment to cross-polarized microwave signals when an installer receives a mounting mast in a selected one of the jaws.
|
