WJ Communications SA1076 Datasheet
Watkins-Johnson: The Cell Extenders
Power Amplifiers
SA1076
TDMA 25-Watt
1.93 GHz to 1.99 GHz
Linear Power Amplifier Module
The Wireless Edge
™
7. 1303. 750. 870
IN
OUT
3X . 045
8. 00
. 44
J2 CONNECTOR (PANDUIT P/N MLAS156-4)
J1 CONNECTOR (3M P/N 3591-5002)
HEAT SINK MOUNTING SURFACES
. 53
. 53
. 82
3.12
3. 80
7. 490. 510 2.200
.38
3.35
4.24
.37
2.476
6.5805.8303.5303.0301.450
.748
1.036
2.188
1.324
.09
J2 J1
.05
5.400
2X . 38
3X 3. 755
2X SMA JACK
6X Ø .136
SLOT THRU
. 218
. 71
5X .112–40 UNC–2B
.250 MIN THD
OUTLINE DRAWING
WJ Wireless Products: 1-800-WJ1-4401• FAX: 650-813-2447 • e-mail: wireless.info@wj.com.
W
atkins-Johnson’s SA1076 Power
Amplifier provides exceptional
linearity and low vector error for TDMA
digital modulation applications. Utilizing
WJ’s GaAs amplifiers driving bipolar
transistors in the class AB output stage,
the SA1076 achieves a high third-order
intercept point combined with superior
efficiency when compared to an equiva-
lent power class A amplifier. Special non-
linear design techniques are utilized to
minimize unwanted adjacent channel
power. To aid top level system diagnos-
tics and reliability, the unit includes
alarms to identify if an active part fails
or if a poor load is presented to the RF
output. In the event that a fault is detect-
ed or to simply save DC power, a digital-
ly controlled shutdown is provided. An
integral logarithmic power detector mea-
sures the output power of the amplifier
over a 16 dB dynamic range.
■
25 Watts TDMA IS-136
■
+45 dBm P1dB
■
45 dB Gain
■
-30°C to +85°C
Watkins-Johnson: The Cell Extenders
Power Amplifiers
The Wireless Edge
™
SA1076
TDMA 25-Watt 1.93 GHz to 1.99 GHz
Linear Power Amplifier Module
-25
8
Note: This is typical
performance for
F=1960 Mhz, &
T=+25 deg C
7
6
4
5
3
1
0
2
-30
-40
-45
-60
-55
-50
-65
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
-35
Output Power (dBm)
ACP Rejection (dB)
EVM (%) & Phase Error
ACP(-30 KHz)
ACP(+30 KHz)
ACP(-60 KHz)
ACP(+60 KHz)
EVM(%)
Mag Err (%)
Phase Err (deg)
W-J SA1076 PCS ACP Rejection & EVM as a
Function of Output Power (NADC TDMA Format)
WATKINS-JOHNSON COMPANY • 3333 Hillview Avenue • Palo Alto, CA 94304-1223
Specifications (Preliminary)
Parameters (Baseplate Temperature: -30°C to +85°C) Typical Level Specified Limits
Frequency 1.930-1.990 GHz
P
out
at 1 dB Gain Compression +45 dBm
Gain (small signal at 25°C) 45 ± 1.0 dB
Gain Variation over Temp (-30°C to +85°C) ±1.5 dB
NADC IS-136 Specifications: P
out
= 25 watts
ACP (30 KHz offset) -30 dBc max -26 dBc max
ACP (60 KHz offset) -50 dBc max -45 dBc max
ACP (90 KHz offset) -16 dBm max -13 dBm max
Harmonic Output (with a +44.8 dBm TDMA output at the fundamental)
a) 2nd Harmonic -5 dBm
b) 3rd Harmonic -30 dBm
Third-Order 2-Tone Output Intermodulation Product Rejection (Measured with
+37 dBm per tone, T = +25°C) -35 dB max -30 dB max
Noise Figure 5.0 dB 6.5 dB
Input and Output Impedence 50 ohm
Return Loss (1.930-1.990 GHz)
Input and Output -20 dB -15 dB
Load Mismatch Sustainable without Damage 3.0:1
Output Power Monitor
a) P
out
= +44 dBm CW 4.5 V 5.0 V max, 4.0 V min
b) P
out
= +36 dBm CW 2.5 V 3.0 V max, 2.0 V min
c) P
out
= +28 dBm CW 0.5 V 1.0 V max, 0.0 V min
Supply Voltages +24 V 23.5 -26.5 V
Maximum Supply without Damage, +24 volt Supply +28 VDC
Maximum DC Current (P
out
≤44 dBm TDMA), +24 volt Supply 6.0 amps 7.0 amps
DC Power Dissipation (P
out
≤44 dBm TDMA), +24 volt Supply 145 watts 168 watts
RF Connectors SMA Female
Stability (No spurious outputs above -50 dBc) Unconditionally stable for all loads
Size (Heat sink not included) 0.82" (H), 3.80" (W), 8.00" (L)
Weight (Heat sink not included) 625 grams (22 oz.)
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