CIRCUIT BOARD ASSEMBLY WITH HIGH AND LOW FREQUENCY SUBSTRATES
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United States of America Patent
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Issued Date -
Jul 7, 2016
app pub date -
Jan 7, 2015
filing date -
Jan 7, 2015
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A circuit board assembly includes a low-frequency (LF) substrate, a monolithic microwave integrated circuit (MMIC), electrical components, a high-frequency (HF) substrate, and an antenna. The LF substrate is formed of FR-4 type material. The LF substrate defines a waveguide through the LF substrate. The MMIC is attached to the top-side of the LF substrate and outputs the radio-frequency signal. The electrical components are electrically attached to the LF substrate. The HF substrate is soldered to the top side of the LF substrate. An opening through the HF substrate surrounds the MMIC. A vertical transition guides the radio-frequency signal output by the MMIC to the waveguide. A plurality of wire bonds electrically connects the MMIC to the HF substrate and couple the radio-frequency signal from the MMIC to the vertical transition. The antenna is attached to the LF substrate and configured to radiate the radio-frequency signal from the waveguide.
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