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EB750SOT89BG
FPD750SOT89 2.4GHz to 2.6GHz LNA EVALUATION BOARD
FEATURES
Frequency (GHz)
P1dB (dBm)
SSG (dB)
N.F. (dB)
OIP3 (dBm)
Bias
2.4
24.3
15.4
0.95
34.0
2.5
24.3
15.2
0.95
35.0
5V, 100mA
2.6
24.4
15.0
1.0
34.0
DESCRIPTION AND APPLICATIONS
This evaluation board is a single-ended, dual biased, power amplifier. It is reactively
matched at a frequency of 2.4 to 2.6GHz. The active device is a Filtronic FPD750SOT89;
a double-heterojunction, 750μm gate periphery PHEMT. The connectors are SMA jacks
soldered to a 30mil thick FR4 PC Board. Both RF ports are DC-decoupled.
Biasing can be applied through test clips (E-Z hooks) at the bias vias on the top 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.
S-PARAMETERS
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support,
contact RFMD at (+1) 336-678-5570 or [email protected]
EB750SOT89BG
FPD750SOT89 2.4GHz to 2.6GHz LNA EVALUATION BOARD
Circuit Layout and Schematic
FPD750SOT89 2.4GHz to 2.6GHz
Vg
Vd
33pF
0.01uF
20O
Lg
33pF
0.01uF
33pF
C1
Q1
+ 1.0uF
+
Ld
Tab
33pF
0.63"
C2
L1
1.45"
Component Values
Component
Value
Description
Lg
22nH
LL1608 Toko chip inductor
Ld
22nH
LL1608 Toko chip inductor
L1
8.2nH
LL1005 Toko chip inductor
C1
2.0pF
ATC 600S chip capacitor
C2
0.8pF
ATC 600S chip capacitor
Tab
Copper tab (no component)
Eval board material - 31mil thick FR4 with 1/2 Ounce Cu on both sides
D.C. Blocking capacitors are ATC series 600S. A tantalum 1.0µF is used at the drain terminal. All other
capacitors are 0603 and 0805 standard chip capacitors. A 0603 size 20 Ohm Chip resistor from Vishay is
used on the gate D.C. bias line for stability.
FPD750SOT89 EVAL Board -Vg
Schematic
0.01uF
@2.4 to 2.6GHz
33pF
Vd
1.0uF
0.01uF
33pF
20 Ohm
33pF
RF IN
L1
C1
22 nH
22 nH
C2
33pF
RF OUT
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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