User Manual

ZE51/61-2.4 RF Module User Guide
1VV0300868 Rev.4 – 23/06/2011
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 41 of 54
CHAPTER VII. ANTENNA CONSIDERATIONS
VII.1. Antenna recommendations
ZE51/61-2.4 performances when used in a product are strongly dependent on the antenna type and its location.
Particular cautions are required on the following points:
 Use a good and efficient antenna designed for the 2.4 GHz band.
 Antenna must be fixed in such a location that electronic noise cannot affect the performances. (Outside
location is ideal if available).
 Antenna directivity must be low (Omni directional antenna is usually the best choice).
Recommended antenna specifications:
 Frequency Band : 2440MHz +/- 100MHz
 Radiation Pattern : Omni directional
 Nominal Impedance: 50 
 VSWR: 1.5:1 max.
 Gain: 0dBi
 Polarization: Vertical