EB750SOT89AH FPD750SOT89 3.5GHz EVALUATION BOARD • • • • ¥ FEATURES 22dBm P1dB 14dB Gain 0.75dB Noise Figure 40dBm OIP3 (Measured @ 11dBm per tone) Bias VD = 5V, ID = 100mA DESCRIPTION AND APPLICATIONS This evaluation board is a single-ended, dual biased, power amplifier. It is reactively matched at a frequency of 3.4-3.6GHz. The active device is a Filtronic FPD750SOT89. A lower noise figure of 0.6dB can be achieved by biasing the device at 4V, 50mA. Biasing can be applied at the bias pins 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. SCHEMATIC -Vg Vd FPD750SOT89 EVAL Board Schematic 0.01uF 1.0uF 15pF 2.7pF Z7 2.7pF Z14 Z6 Z0 1 RF IN (50 Ohm) Z13 20 Ohm 33pF 3 Z1 Z3 1 2 Z2 3 33pF Z9 1 2 Z5 Z4 Desc. Z0 Z1 Z2 Z3 Z4 Z5 Z6, Z13 Z7 Z8 Z9 Z10 Z11 Z12 Z14 Z8 3 1 2 Z11 3 2 Z12 RF OUT (50 Ohm) Z10 Value W1=0.068" W2=0.068" W3=0.045" Microstrip Tee W1=0.068" W2=0.030" W3=0.045" Microstrip Tee 0.030" x 0.280" Microstrip W1=0.030" W2=0.020" W3=0.130" Microstrip Tee 0.130" x 0.100" Microstrip 0.020" x 0.200" Microstrip 0.005" x 0.550" Microstrip 0.400" x 90° Microstrip Radial Stub 0.340" x 0.480" Microstrip W1=0.340" W2=0.220" W3=0.180" Microstrip Tee 0.180" x 0.290" Microstrip 0.220" x 0.450" Microstrip W1=0.220" W2=0.068" W3=0.045" Microstrip Tee 0.150" x 90° Microstrip Radial Stub 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. EB750SOT89AH FPD750SOT89 3.5GHz EVALUATION BOARD CIRCUIT DETAILS The circuit used was designed using Rogers™ RO4003 material with a core thickness of 30 mils and 0.5oz copper cladding. The dielectric constant is 3.38. The PCB is mounted on a base plate. 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. Q1 C1, C2, C3, C4, and C6 are ATC series 600S chip capacitors. C5 is a ATC series X7R chip capacitor. C7 is a Tantallum capacitor 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or [email protected]. EB750SOT89AH FPD750SOT89 3.5GHz EVALUATION BOARD 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 1.5 2 2.5 3 3.5 4 4.5 Frequency (GHz) 5 5.5 6 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].