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EB21500QFN-AA
FPM21500QFN 1.7 - 2.0GHz LNA EVALUATION BOARD
FEATURES
Measured @ 1.85GHz
• 29 dBm Output Power
• 16.5 dB Small Signal Gain
• 0.65 dB Noise Figure
• 38 dBm OIP3 measured @ Pout = 12dBm (per tone)
● Bias 4V, 100mA
DESCRIPTION AND APPLICATIONS
The data given above is based on measurements taken on the evaluation board described
in this data sheet. This evaluation board is a balanced, dual biased, low noise amplifier. It
is reactively matched at a frequency of 1700 to 2000 MHz. The active device is a
Filtronic FPM21500QFN; a double-heterojunction, 1500 μm gate periphery PHEMT.
Biasing can be applied at the bias pins on the top and 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.
SCHEMATIC
FPM21500QFN EVAL Board 0.01uF
Schematic
33pF
@ 1.7 - 2.0GHz
-Vg
Vd
0.01uF
33pF
20 Ohm
33pF
RF IN
50 Ohm
1.0uF
22 nH
22 nH
L1
50 Ohm
L3
C1
C2
33pF
C3
C4
L2
33pF
L4
33pF
22 nH
33pF
RF OUT
22 nH
33pF
20 Ohm
0.01uF
1.0uF
0.01uF -Vg
Vd
BOARD LAYOUT
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support,
contact RFMD at (+1) 336-678-5570 or [email protected]
EB21500QFN-AA
FPM21500QFN 1.7 - 2.0GHz LNA EVALUATION BOARD
Vd1
1.0uF
33pF
33pF
L3
Lg
C1
33pF
L1
C3
33pF
C4
33pF
A2
L2
R2
33pF
33pF
1.0uF
0.01uF
0.01uF
P5
Ld
L4
Q1
Lg
33pF
C2
f 1SF
xxxx
A1
P4
0.01uF
0.01uF
R1
P3
Ld
P1
P6
P2
Vd2
The circuit used was designed using Roger 4350 material with a core thickness of 30 mils
and 0.5oz copper cladding. The dielectric constant is 3.48 Recommended bias applied to
the circuit is 4V, 100mA with a negative gate voltage for current limiting.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support,
contact RFMD at (+1) 336-678-5570 or [email protected]
EB21500QFN-AA
FPM21500QFN 1.7 - 2.0GHz LNA EVALUATION BOARD
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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