Antenna duplexer in waveguide, with no tuning bends
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United States of America Patent
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-
Jul 16, 2002
Grant Date -
N/A
app pub date -
Apr 7, 2000
filing date -
Sep 19, 1997
priority date (Note) -
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Abstract
An antenna duplexer including an elongated hollow body realized with two opposed half shells is disclosed. The duplexer also includes a first opening or antenna port and a second and a third opening, or ports of the transmitter and of the receiver. A filtering structure is provided including a plurality of metal inserts available to uncouple the transmitter from the receiver. The duplexer has at least an additional portion of waveguide structured in order to keep the wave 'under the cut-off frequency', interposed between at least second or third opening and the relative end wall of the elongated body. An additional portion of wave guide includes an additional metal insert, forming part of the above mentioned filtering structure, which determines an exponential attenuation of the signal, thus nullifying the negative effects deriving from the mechanical tolerance of the hollow body.
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