Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2011-07-05
2011-07-05
Pascal, Robert (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S204000, C333S185000
Reexamination Certificate
active
07973618
ABSTRACT:
A phase shifter fabricated by a simple process and having a simple structure, a method of fabricating the same, and a duplexer having the same are disclosed. The duplexer includes a transmitting-end filter capable of passing only a signal in the range of a transmission frequency, a receiving-end filter capable of passing only a signal in the range of a reception frequency, and a phase shifter interposed between the transmitting-end filter and the receiving-end filter to isolate a transmitted signal of the transmitting-end filter and a received signal of the receiving-end filter from each other. The phase shifter includes a substrate provided with an input port and an output port, an inductor formed on the substrate and connected to the input and output ports, and a capacitor provided on the substrate, wherein the capacitor and inductor share a region of the substrate.
REFERENCES:
patent: 4598276 (1986-07-01), Tait
patent: 7268645 (2007-09-01), Meltzer et al.
Kim Chul-soo
Nam Kuang-woo
Park Yun-kwon
Song In-Sang
Glenn Kimberly E
Pascal Robert
Samsung Electronics Co,. Ltd.
Sughrue & Mion, PLLC
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