Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2007-04-23
2009-08-18
Lee, Benny (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S126000, C333S129000, C330S286000
Reexamination Certificate
active
07576627
ABSTRACT:
This invention provides a novel electronically tunable active duplexer for wireless transceiver applications. It relates to an active duplexer with full-duplex operation, permitting simultaneous transmission and reception of signals at same or different frequencies. It incorporates varactors, instead of fixed or mechanically adjustable capacitors, in phase shifting networks enabling one to electronically tune, with ease and precision, the frequency at which isolation is desired, over a band in both transmit and receive modes of operations. It can be implemented as a Monolithic Microwave Integrated Circuit (MMIC).
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Shastry Prasad Narasimha
Sundaram Balamurugan
Bradley University
Chase Marcellus A.
Glenn Kimberly E
Lee Benny
Sonnenschein Nath and Rosenthal LLP
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