Datasheet

PRODUCT SPECIFICATION
REVISION:
ECR/ECN INFORMATION:
TITLE:
ISM 868/915MHz Ceramic Antenna
Product Specification
SHEET No.
B
EC No:
4 of 8
DATE:
2018/09/06
DOCUMENT NUMBER:
CREATED / REVISED BY:
CHECKED BY:
APPROVED BY:
PS-2081420001
Kang Cheng 2018/09/06
Cooper Zhou 2018/09/06
Stary Song 2018/09/06
TEMPLATE FILENAME: PRODUCT_SPEC[SIZE_A4](V.1).DOC
4.0 GENERAL SPECIFICATION
PRODUCT NAME
ISM 868/915MHz Ceramic Antenna
PART NUMBER
2081420001
FREQUENCY RANGE
868MHz-870MHz
902MHz-928MHz
POLARIZATION
Linear
IMPEDANCE WITH MATCHING
50 Ohms
STORAGE TEMPERATURE
-40℃ to 125℃
RELATIVE HUMIDITY
55%-85%
RF POWER
2 Watts
ANTENNA TYPE
Ceramic
5.0 ANTENNA SPECIFICATION
All measurements are done of the antenna mounted on reference PCB (90*40*0.8mm)
with VNA Agilent E5071C and Over-The-Air (OTA) chamber.
5.0.1 ANTENNA PERFORMANCE
P/N
2081420001
FREQUENCY RANGE
868MHz-870MHz
902MHz-928MHz
PEAK GAIN(MAX)
1.5dBi
1.8dBi
AVERAGE TOTAL EFFICIENCY
70%
65%
RETURN LOSS
<-10dB
<-5dB
Note that the above antenna performance is measured with just the antenna mounted on a
reference PCB (90*40*0.8mm) in free space. When implement into the system, the frequency
resonant might be off-tune due to the loading of surrounding components especially metal plane.
This off-tune can be compensated through matching. Although module manufacturers specify a
peak gain limit, it is based on free-space conditions. The peak gain will be degraded by 1 to 2dBi
in the actual implementation as the radiation pattern will change due to the surround components.
As such, during selection of antenna, you can select one with high peak gain to compensate for
the loss. Molex can offer assistant to choose the best location and best tuning in-order to meet this
peak gain requirement.