Description:
GPS distribution amplifier
for sharing one GPS antenna with two pieces of equipment in
a communications base station. The design consists of a LNA,
Wilkinson splitter, buffer amplifiers and phantom power
supply. Port to port isolation is > 50 dB on all ports as
this is a very important parameter in this type of
application to prevent one GPS receiver from interfering
with another. The two layer PCB was designed with Coplanar
waveguide over groundplane techniques for very low
sensitivity to manufacturing tolerances and very low
assembly costs.
- 3 dB gain, 4.4 dB Noise
figure at 1575 MHz center frequency with 130 MHz -3 dB
bandwidth.
- > 17 dB return loss
on all ports.
- > 50 dB port to port
isolation.
- 3 to 20 VDC input
voltage at 20 mA.
- Environmentally rugged
design, -40 to 70 Deg C operating range, fully ESD
protected.
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