User's Manual

RF Power Amplifiers

Andrew Corporation – Power Amplifier Group

Propriety – Use pursuant to Company Instruction

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This stage brings the signal to its desired high power level, it is the heart of the RF

section of the unit. The unit power, linearity and efficiency directly come from this

block.

− Power conversion and conditioning circuit

This block is made of a DC/DC converter and various voltage regulators to do the

interface between the customer supply network and the internal functions of the unit. It

provides all the voltages and signal interface to the internal blocks of the unit.

− Controller circuit

This block is the “intelligence” of the unit, it is based on the CPU and computes all the

internal functions of the unit. These are the power up sequences, the performances

compensation over temperature, manages the monitoring and control of the unit, it also

records many events in the so called flight recorder .

− Communications circuit

The communication circuit is associated to the controller circuit to communicate with

the outside world. It handles the customer specific protocol to bring in and out all

monitoring and control commands.

Figure PA Configuration

Analogical

interface

Power Supply

distribution. Current

measurement

-48V power supply Analog

interface

PART

RF input

Power

detector

RF Output