After rectifying by diode D1, the signal is fed to a two-transistor highgain Darlington amplifier, T2-T3. Assuming that a 10-inch telescopic antenna is used, ... 144 MHz rf detector circuit schematic.

Figure 3 also shows the evaluation board for the ADL5920, a new RF power detection subsystem with up to 60 dB of detection range, housed in a 5- × 5-mm MLF package (the ADL5920 IC is located ...