User's Manual

URD1 – OTL 5696.1– 022 / 72740 Edition 0.4 HILONC- 3GPS APPLICATION NOTE
The HILONC-3GPS module incorporates RF transceiver technology that converts received signals directly from
RF-to-baseband and transmits signals directly from baseband-to-RF (known as direct conversion or zero
intermediate frequency (ZIF) processing). This technique eliminates the need for large IF surface acoustic wave
(SAW) filters and supporting IF and LO circuits.
6.1. Antenna Connection
The HILONC-3GPS module is equipped with an RF LGA pad for antenna connection.
Definition of the reference antenna connector:
·
Strictly 50 ohms matched impedance PCB tracks
·
Straight PCB tracks
Antenna gain:
·
Radiation pattern: depending on antenna position and size of device
·
Gain average in space in all frequencies: > -3dBi
·
Maximum VSWR: < 1.5:1 with 50 ohm reference impedance
In order to achieve optimum sensitivity and output power, it is recommended to implement a matching circuit
between the module and the antenna:
: Antenna connection reference
6.1.1. Antenna Pad
Three 50 ohm RF pads on the HILONC-3GPS PCB are available for antenna connection. One is for the Primary
antenna, the second is for Diversity RX and the other is for GPS antenna.
Note d’étude / Technical document :
01/08/20111 - Page 25 / 41