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JANUARY 2006 Doc. No. DG_7024E Altec Electronic AG Seite 1 / 32 AL7020S, AL7024S Designer’s Guide Information provided by Altec Electronic AG is believed to be accurate and reliable. However, no responsibility is assumed by Altec Electronic for its use, nor any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Altec other than for circuitry embodied in Altec products. Altec Electron

Antenna Connector Interface Doc. No. DG_7024E Altec Electronic AG Seite 15 / 32 AL7020S, AL7024S Designer’s Guide 3.4.2 Antenna Performance Recommendations Table 3.7 -Antenna Performance Recommendations Frequencies: GSM 850 TX 824 – 849 MHz RX 869 – 893 MHz GSM 900 TX 880 – 915 MHz RX 925 – 960 MHz DCS 1800 TX 1710 – 1785 MHz RX 1805 – 1880 MHz PCS 1900 TX 1850 - 1910 MHz RX 1930 – 1990 MHz Gain: 0 dBi (unity) gain or greater Impedance: 50 Ohm VSWR: Typical: 1.5:1 Worst case: 2.5:1 3.4.3 Antenna