Rainbow Electronics MAX2406 - Manual (Page 7)

LO port is internally terminated to 50
Ω
and provides a
good match (a VSWR of approximately 1.2:1 to 2GHz,
and a VSWR of approximately 2:1 to 3GHz).
Layout
A properly designed PC board is an essential part of
any RF/microwave circuit. Be sure to use controlled
impedance lines on all high-frequency inputs and out-
puts, use low-inductance connections to ground on all
GND pins, and place decoupling capacitors close to all
V
CC connections.
For the power supplies, a star topology works well.
Each V
CC
node in the circuit has its own path to a cen-
tral V CC and a decoupling capacitor that provides low
impedance at the RF frequency of interest. The central
V
CC node has a large decoupling capacitor as well.
This provides good isolation between the different sec-
tions of the MAX2406. The MAX2406 EV kit layout can
be used as a guide to integrating the MAX2406 into
your design.
MAX2406
Low-Cost Downconverter
with Low-Noise Amplifier
_______________________________________________________________________________________ 7
BIAS
CONTROL
MATCH
RX MIXER
IF
IF OUT
IF BPF
RF BPF
RF BPF
IF
LO SOURCE
LO
BUFFER
LNAIN
LNAOUT
RXEN
V CC V CC
MAX2406
LNA
____________________________________Typical Application Functional Diagram