High-isolation semiconductor device
AssigneeNEC Compound Semiconductor Devices, Ltd.
InventorsToshio Suda, Hidenori Itoh
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Abstract
A switching device for switching a plurality of RF signal lines to deliver a selected one of the RF signals to a receiver has an isolation D/U characteristic as high as 40 dB or higher. The switching device includes a mounting board made of dielectric and a matrix switch mounted thereon and implemented by one or more of SWIC. The RF signal lines in the switching device has no crossing point therebetween on either side of the mounting board to achieve the high isolation D/U ratio or lower cross-talk.
Claims13
A semiconductor device comprising at least one integrated circuit (IC) and a mounting board having a top surface for mounting thereon said IC at a bottom surface of said IC, said mounting board having a dielectric substrate, first and second input lines formed on said dielectric substrate for transferring first and second input signals, respectively, to said IC, and first and second output lines formed on said dielectric substrate for transferring first and second output signals, respectively, generated by said IC based on said first and second input signals, wherein:
- said dielectric substrate has no crossing point between said first input line and said second input line, wherein each of said first and second output lines has an isolation D/U ratio of 40 dB or above with respect to said first output signal and said second output signal.
Dependencies are inferred from the claim text.