Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1988-04-12
1989-12-26
LaRoche, Eugene R.
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333203, 333230, H01P 512
Patent
active
048900788
ABSTRACT:
A diplexer having receive and transmit sections connected to a common port comprises square-cross section cavities arranged in rows and columns. At least three adjacent cavities form a triangular group in which the non-adjacent cavities are cross-coupled. The cross coupling means comprises an inductive loop or a capacitative probe. Adjacent cavities in each section are also coupled, on folded paths, by irises. Cavity wall thickness is reduced where possible. The antenna port is diplexed to both sections by a T-branch connector having wire sections which are tapped into central resonators at a predetermined distance above electrical ground. Low pass filters with non-overlapping peak responses provide further isolation between the sections.
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Mole, Richard L., "A Numerically Optimized Contiguous Diplexer", 1979, pp. 285 and 286 (Abstract) IEEE MTT-S.
Pfitzenmaier, Gerhard, "Synthesis and Realization of Narrow-Band Canonical Microwave Bandpass Filters Exhibiting Linear Phase and Transmission Zeros", Sep. 1982, IEEE, vol. MTT-30, No. 9, pp. 1300-1311.
Ham Seung
LaRoche Eugene R.
Phase Devices Limited
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