EVDO PC Embedded Datasheet

Product Datasheet
V001R006
Issue 2 (2009-01-20)
Confidencein Commercial
Page 34 of 60
4.3 Antenna Design Requirements
4.3.1 Recommended Index of the Module Antennas
Table 4-4 Recommended index of the main antenna
Working frequency 824–849 MHz and 869–894 MHz and 1850–1910 MHz
1930–1990 MHz
Port impedance 50 Ohm
Port standing wave < 2.0
Peak gain > 0 dBi
Antenna efficiency > 60%
Polarization Linear polarization
Pattern Omnidirectional
GPS shares the auxiliary antenna with receiver diversity, when GPS session is
ongoing, the receiver diversity functionality will be turned off automatically and the
auxiliary antenna will serve for GPS. However, when GPS session is closed, the
antenna will be switched back to serve for receiver diversity.
Table 4-5 Recommended index of the auxiliary antenna
Working frequency 869–894 MHz, 1930–1990 MHz
Port impedance 50 Ohm
Port standing wave < 2.0
Peak gain > –3 dBi
Antenna efficiency > 30%
Polarization Linear polarization
Pattern Omnidirectional
Table 4-6 Recommended index of the GPS antenna
Working frequency 1574.42MHz~1576.42 MHz
Port impedance 50 Ohm
Antenna efficiency > 50%
Polarization Circular polarization or Linear polarization
Pattern Omnidirectional