RF power transistor having cascaded cells with phase matching between cells
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United States of America Patent
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-
Oct 2, 2001
Grant Date -
N/A
app pub date -
Feb 18, 2000
filing date -
Feb 18, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The power delivered by an RF power transistor having cascaded cells or unit elements is improved by reducing the phase imbalance between elements and thereby reducing transverse effects between cells. Phase imbalance is reduced by varying the number of transistor elements connected to interconnect areas, connecting wire bonds to an input transmission line concentrated near an outer edge in the transmission line to take advantage of surface skin effects on current, and varying the surface area of the interconnect areas to adjust input impedance and output impedance of each cell.
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