H330SS LGA Module Hardware User Manual Page 38 of 38
(4) Radiation Pattern
Radiation pattern refers to the directional dependence of the strength of the radio waves from the antenna or
other source.
The radiation pattern of half wave dipole antennas is the best for wireless terminals. If it is built-in antenna, PIFA
antenna is recommended:
Antenna area (H x W x L): 6mm x 10mm x 100mm. PIFA or IFA antenna is recommended.
Radiation Pattern: Omni directional
(5) Gain and Directivity
The directivity of the antenna is the electromagnetic field strength of the electromagnetic wave in each
direction. An antenna's power gain is a key performance figure which combines the antenna’s directivity and
electrical efficiency.
Recommended antenna gain ≤ 2.5dBi
(6) Interference
Besides the antenna performance, the interference on the PCB board also affects the radio performance
(especially the TIS) of the module. To guarantee high performance of the module, the interference sources on
the user board must be properly controlled. On the PCB board, there are various interference sources that can
affect the module, such as the speaker, LCD, CPU, FPC trace and audio circuits, the power supply should be far
away from antenna, notice isolation, shield and filtering processing issues.
(7) TRP/TIS
TRP (
Total Radiated Power
)
:
W850/W900/W1900/W2100>19dBm
GSM850>28dBm
GSM900>28dBm
DCS1800>25dBm
PCS1900>25dBm
TIS (
Total Isotropic Sensitivity
)
:
W850/W900<-102dBm
W1700/W1900/W2100<-103dBm
GSM850<-102dBm
GSM900<-102dBm
DCS1800/PCS1900<-102dBm
7.3.2
Diversity Antenna Design
Diversity reception function of H330S is optional, please add a diversity antenna if you want to use this function.
The design methods of diversity antenna and main antenna are the same, its efficiency indicators allows to
reduce 3dB. The isolation between main antenna and diversity antenna should be higher than 12dB.
