Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention
Patent
1995-04-21
1997-02-11
Gensler, Paul
Telecommunications
Transmitter and receiver at same station
With transmitter-receiver switching or interaction prevention
333 11, 343700MS, 343787, H04B 156, H01Q 100
Patent
active
056030983
ABSTRACT:
An integrated radiating and coupling device (30) for a duplex communication radio (26) is formed using a ferrite body (36) having first and second surfaces. A multi-port circulator (40) is mounted on the first surface. The circulator (40) has at least three ports; a transmitter port (42), a receiver port (44), and an antenna port (38). A patch antenna (32) is mounted on the second surface and connected to the antenna port (38) by, for example, a wire passing through a via hole in the ferrite body (36). The device (30) provides transmitter and receiver isolation, antenna coupling, and filtering in a single integrated structure.
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An article entitled "Novel Filter Design Incorporating Asymmetrical Stripline Y-Junction Circulators" by H. How et al., IEEE Transactions on Microwave Theory and Techniques, vol. 39, No. 1, Jan. 1991, pp. 40-46.
An article entitled "On Stripline Y-Circulation at UHF" by H. Bosma, IEEE Transactions on Microwave Theory and Techniques,, Jan. 1964, pp. 61-72.
An article entitled "Operation of the Ferrite Junction Circulator" by C. E. Fay et al., IEEE Transactions on Microwave Theory and Techniques,, Jan. 1965, pp. 15-27.
An article entitled "Radiation Frequencies of Ferrite Patch Antennas" by H. How et al., Electronics Letters,, vol. 28, No. 15, 16th Jul. 1992, pp. 1405-1406.
An article entitled "Wide-Band Operation of Microstrip Circulators" by Y. S. Wu et al., IEEE Transactions on Microwave Theory and Techniques, vol. MTT-22, No. 10, Oct. 1974, pp. 849-856.
Bogacz Frank J.
Botsch Sr. Bradley J.
Gensler Paul
Motorola Inc.
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