Specifications

AirPrime Embedded Module Hardware Integration Guide
96 Proprietary and Confidential 2130114
Radiated efficiency
Tabl e 1- 5 details the minimum total radiated efficiency for main and, if supported,
diversity antennas.
Antenna-to-antenna isolation
(MC57xx/MC8201/MC8700/MC8775V/MC878x/MC879x)
Use a network analyzer to measure isolation between the main and secondary
antenna pairs over the operating Tx/Rx frequency bands described in Tabl e 1 - 3
on page 92.
Tabl e 1- 6 details the minimum isolation allowed over the various frequency bands
for the applicable antenna pairs.
When you perform these tests:
• If the antennas can be moved, test all positions for both the main and
secondary antennas.
• Collect worst-case isolation data.
Diversity/GPS antenna
869–894 < 3:1 <3.5:1
Preferable to have input VSWR < 2:1
925–960 < 3:1 <3.5:1
1930–1990 < 3:1 <3.5:1
2110–2170 < 3:1 <3.5:1
Table 1-5: Minimum total radiated efficiency
a
a. Total efficiency is measured at the RF connector. It includes mis-
match losses, losses in the matching circuit, and antenna losses.
Mode Main Diversity
Transmit (Tx) 50% n/a
Receive (Rx) 30% 25%
Table 1-6: Minimum Main–Secondary antenna isolation
Antenna pair
Isolation (dB)
850/900
band
GPS band
DCS/ PCS/
UMTS band
Main/Diversity (Tx and Rx) 8 (cell) 8 (PCS/UMTS)
Main (Tx)/GPS 15 15 15
Table 1-4: VSWR (Voltage Standing Wave Ratio) (Continued)
Frequency
(MHz)
Typical
VSWR
Worst-case VSWR
at band edges
Notes