TIM-5H
-
Hardware
Integration
Manual
Design-In
GPS.G5-MS5-07015-A-1
u-blox
proprietary
Page 22
your position is our focus
For
the
correct
calculation
of
the
micro
strip
impedance,
one
does
not
only
need
to
consider
the
distance
between
the
top
and
the
first
inner
layer
but
also
the
distance
between
the
micro
strip
and
the
adjacent
GND
plane
on
the
same
layer
Use
the
Coplanar
Waveguide
model
for
the
calculation
of
the
micro
strip.
Figure 10: Micro strip on a 2-layer board (Agilent AppCAD Coplanar Waveguide)
shows
an
example
of
a
2-layer
FR4
board
of
1.6
mm
thickness
and
a
35
μ
m
(1
once)
copper
cladding.
The
thickness
of
the
micro
strip
is
comprised
of
the
cladding
(35
μ
m)
plus
the
plated
cupper
(typically
25
μ
m).
depicts
an
example
of
a
multi
layer
FR4
board
with
18
μ
m
(½
once)
cladding
and
180
μ
dielectric
between
layer
1
and
2.
Figure 11: Micro strip on a multi layer board (Agilent AppCAD Coplanar Waveguide)
2.9 Antenna and Antenna Supervisor
u-blox
5
modules
receive
L1
band
signals
from
GPS
and
GALILEO
satellites
at
a
nominal
frequency
of
1575.42
MHz.
The
RF
signal
is
connected
to
the
RF_IN
pin.
u-blox
5
modules
can
be
connected
to
passive
or
active
antennas.
