User's Manual

Solutions for a Real Time World NEMO2 Design Guidelines
Applicationnote
Antenna & External RF Path
Nemo2 is not shipped with an on board antenna and an antenna is not fixed on the
module. It is the integrators responsibility to handle the design of the antenna design of
their product when using Nemo2.
NEMO2 was tested and qualified with a 2.4GHz, external, reverse SMA, di-pole, one-
quarter wave length antenna connected to a reverse SMA RF connectors and a
microstrip transmission line on the Nemo2 evaluation reference board. Any change of
antenna, RF connector or miscrostip transmission line characteristics used other than
the Nemo2 reference evaluation board may require retesting of radiated portion of the
FCC part 15B specification and will require a Class II permissive change.
NEMO2 has a single ended RF pad on the bottom of the module. The pad impedance is
50 ohms. The integrator must take care on using a microstrip transmission line for the
RF signal out. Extra care is needed on the design of the microstrip and must adhere to
Unigen’s design integration rules. The termination of the path can be a matched
antenna (printed or component) or can terminate to a RF connector (U.FL, GSC, SMA,
etc).
Antenna specifications:
 Manufacturer: Pulse
 Part Number: W1030
 Frequency: 2.4GHz – 2.5GHz
 Gain: 2.0dBi
 Impedance: 50Ω
 VSWR: ≤ 2.0
 Polarization: Vertical
 Electrical Length: ¼ wave, di-pole
 Radiation: Omni