RMPA2451-58 Просмотр технического описания (PDF) - Raytheon Company
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RMPA2451-58 Datasheet PDF : 5 Pages
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RMPA2451-58
# 425430398 2.4-2.5 GHz GaAs MMIC
Power Amplifier
PRODUCT INFORMATION
Test Procedure
for the
evaluation board
(RMPA2451-58-TB)
It is important that the following points be noted prior to testing; Pin designations are as shown in
Figure 2 and 4.
Vgg1 and Vgg2 are the negative Gate bias voltages applied at the pins of the evaluation test board.
Vdd1 and Vdd2 are the positive Drain bias voltages applied at the pins of the evaluation test board.
Vg1 and Vg2 are the negative Gate bias voltages applied at the pins of the package.
Vd1 and Vd2 are the positive Drain bias voltages applied at the pins of the package.
CAUTION: LOSS OF GATE VOLTAGES (VG1, VG2) WHILE DRAIN VOLTAGES (VD1, VD2) ARE
PRESENT MAY DAMAGE THE AMPLIFIER.
The following sequence of procedures must be followed to properly test the amplifier:
Step 1: Turn the RF power OFF.
Step 2: Use the GND terminals of the evaluation
board for the ground of the DC supplies.
Step 3: Apply a nominal voltage of approximately -
3.0V to both Vgg1 and Vgg2 terminals.
Step 4: Apply a nominal voltage of +5.0V to the
Vdd terminals. Adjust Vgg2 to provide a
second stage quiescent Drain current, Idd2,
of 340 mA.. Adjust Vgg1 to give a first
stage quiescent Drain current, Id1 of
60mA..
Step 5: Apply an RF signal within the ISM
frequency range (2.4 - 2.5 GHz) at an
initial input power level of -10 dBm.
Step 6: To perform intermodulation product
measurements, a second RF signal
generator
with a frequency difference of 1 MHz is
required, along with an appropriate
power combiner. The test configuration
should allow this additional generator to
provide the same input power level as
the first generator into the device.
Intermodulation readings may then be
made at the required total output power
levels.
Step 7: To operate at lower quiescent Drain
currents, increase the magnitudes of
Vgg1 and Vgg2 as required, alternatively
to operate at higher quiescent Drain
currents, the magnitudes of Vgg1 and
Vgg2 should be decreased accordingly.
Step 8: When turning the amplifier OFF, the
power-up sequence should be reversed.
Figure 3
Schematic of a
recommended DC
bias/ RF matching
circuit
C3
RF Input
L2
Vgg1
C2
Vdd1
C2
C1
Raytheon
RMPA2451
PPYYWWX
C1
C1
C3
RF Output
L1 C4
Vdd2
C1
C2
Vgg2
C2
www.raytheonrf.com
Characteristic performance data and specifications are subject to change
without notice.
Revised August 5, 2002
Page 3
Raytheon RF Components
362 Lowell Street
Andover, MA 01810
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