DKAZ Amplifier

Zin = Optional 50Ω or 800Ω Zout = 50Ω Gain = 28 to 29 dB at 1MHz NF = 2 to 3 dB OIP3 = +43dBm OIP2 = +56dBm P1dB = +18dBm

Zin = 50Ω Option

VNWA S11 and S21 with Zin = 50Ω Option

P1dB

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Design Notes

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OPA820 Specifications 2SC5551 + OPA820: NF=2dB OIP2=+54dBm OIP3=+41dBm 2N5109 + OPA820: NF=3dB OIP2=+59dBm OIP3=+39dBm

Schematic Version 1 Zin and Gain

Schematic Version 3

Schematic Version 2

Schematic Version 1

Zin = 50Ω and 800Ω

OPA820 OIP Measurements

BN-73-302 4T Evaluation

DKAZ Antenna Examples

Signal to Noise ratio degradation

ITU-R P.372 ambient noise at 1MHz, D: quiet rural Fam = 53.6 EZNEC 3D model at 1MHz Average Gain = -37dB Signal to Noise ratio degradation with System NF=4 = 0.14dB