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EB750SOT89AJ
FPD750SOT89 5.6GHz PA EVALUATION BOARD
FEATURES
•
•
•
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¥
24dBm P1dB
11.5dB Gain
1.5dB Noise Figure
-46dBc IMD @ 12dBm Pout per Tone
Bias VD = 5V, ID = 100mA
DESCRIPTION AND APPLICATIONS
This evaluation board is a single-ended, dual biased, power amplifier. It has a distributed
match with a frequency range of 5.15GHz to 5.85GHz. The active device is a Filtronic
FPD750SOT89; a double-heterojunction, 750μm gate periphery PHEMT. The connectors
are SMA jacks soldered to a 20mil thick Rogers™ RO4003 PC Board. Both RF ports are
DC-decoupled.
Biasing can be applied through test clips (E-Z hooks) at the bias vias on the bottom of the
board. A negative gate voltage is required for current limiting. Ground connection should
be established prior to the gate and drain bias connections. This board is thin and flexible,
so caution should be exercised when connecting it to coaxial cables.
Typical applications include 802.11a WLAN.
PERFORMANCE
FPD750SOT89 Eval board
20
15
10
5
0
dB
-5
-10
-15
-20
DB(|S(1,1)|)
-25
-30
DB(|S(2,2)|)
-35
DB(|S(2,1)|)
-40
3
3.5
4
4.5
5
5.5
6
Frequency (GHz)
6.5
7
7.5
8
Measured Gain and Return Loss
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support,
contact RFMD at (+1) 336-678-5570 or [email protected]
EB750SOT89AJ
FPD750SOT89 5.6GHz PA EVALUATION BOARD
Pout vs Pin @ 5.6GHz
30
Pout (dBm)
25
20
15
10
5
0
-5
-15
-10
-5
0
5
10
15
Pin (dBm)
CIRCUIT DETAILS
The circuit used was designed using Rogers™ RO4003 material with a core thickness of
20 mils and 0.5oz copper cladding. The dielectric constant is 3.38.
Recommended bias applied to the circuit is 5V, 100mA with a negative gate voltage for
current limiting. Do not exceed the absolute maximum ratings for the device given in the
device data sheet.
-Vg
FPD750SOT89 EVAL Board
Vd
Schematic
0.1uF
6.8uF
8.2pF
3.9pF
12pF
33pF
RF IN
20 Ohm
Z1
33pF
Z4
Z3
Z2
FPD750SOT89
Desc.
Z1
Z2
Z3
Z4
Z5
Z6
Z6
Z5
RF OUT
Value
26.98 Ohms, 80.7° @ 5.6GHz
18.23 Ohms, 58.7° @ 5.6GHz
26.98 Ohms, 109° @ 5.6GHz
20.49 Ohms, 100° @ 5.6GHz
34.1 Ohms, 69° @ 5.6GHz
19.1 Ohms, 88.7° @ 5.6GHz
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support,
contact RFMD at (+1) 336-678-5570 or [email protected]
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