Realization of a 27-MHz wireless transmitter using embedded passives on a thin organic substrate

A 27-MHz wireless transmitter is fabricated with all the off-chip inductors, capacitors and resistors built on a thin organic substrate. The transmitter module occupies an area of 25 mm × 25 mm. It includes the transistor circuits on a silicon chip and off-chip passive circuits with large-value inductors and capacitors. The newly packaged transmitter module functions properly and gives a 5 dB higher output power while other performances are comparable to that of the counterpart assembled using discrete passive components. It demonstrates the possible system-on-package (SOP) solution of radio-frequency (RF) systems using the embedded passives.