| 摘要 |
PROBLEM TO BE SOLVED: To provide a new circuit to process a radio frequency signal. SOLUTION: The circuit includes a substrate on which the circuit is placed. The substrate may contain a meta-material and may be incorporated by using at least one substrate layer. A four-port circuit and at least one ground are connected to the substrate. The substrate layer contains a first region with a first set of substrate properties and a second region with a second set of substrate properties. The substrate properties include permittivity and permeability. A substantial portion of the four-port circuit is connected to the second region. The permittivity and/or permeability of the second region are set higher than the permittivity and/or permeability of the first region. The increased permittivity and permeability reduce the size of the four-port circuit and decrease amounts of impedance, inductance, capacitance, a quality factor (Q), and a voltage associated with the four-port circuit. COPYRIGHT: (C)2008,JPO&INPIT
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