Altec GSM SOCKET AL7020S - Manual (Page 15)

AL7020S, AL7024S Designer’s Guide
Doc. No. DG_7024E Altec Electronic AG Seite 15 / 32
3.4 Antenna Interface (RF)
The AL7020S has two models, one for North America Frequency bands (850/1900
MHz), and one for European Bands (900/1800 MHz). The following connection
requirements apply for the AL7020S antenna:
• The AL7020S is terminated with an MMCX connector, and with 50-ohm impedance
in the relevant frequencies.
• The AL7020S can be connected to any antenna with 50-ohm impedance in the
relevant frequency bands.
• The AL7020S is designed to work on VSWR, up to 3:1 The antenna should meet
this requirement.
3.4.1 RF Connector:
The Antenna-jack of the AL7020S module is an MMCX type. It has a snap-in
connection. For the antenna-cable RG178 is recommended.
RF Connector
AL7020S Connector Mating Connector
Standard MMCX female
Amphenol:
MMCX 6251S5-3GT30G-50
gold plated
Standard MMCX male
(connector for cable)
F IGURE 3-4. Antenna Connector Interface