Datasheet

APPLICATION SPECIFICATION
REVISION:
ECR/ECN INFORMATION:
TITLE:
2.4/5G WIFI ANTENNA WITH SIDE
SOLDER CABLE
SHEET No.
C
EC No:
171309
6 of 32
DATE:
2018/01/24
DOCUMENT NUMBER:
CREATED / REVISED BY:
CHECKED BY:
APPROVED BY:
AS-2042810100
Benson Liu 2018/01/24
Kang Cheng 2018/01/24
Chris Zhong 2018/01/24
TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC
4.2 ANTENNA PERFORMANCE
Description
Equipment
Requirement
Frequency Range
VNA E5071C
2.4-2.5GHz
5.15-5.85GHz
Return Loss
VNA E5071C
< -10 dB
Peak Gain (Max)
OTA Chamber
2.0dBi
3.3dBi
Average Total
Efficiency
OTA Chamber
>65%
>68%
Polarization
OTA Chamber
Linear
Input Impedance
VNA E5071C
50 ohms
Note that the above antenna performance is measured with just the antenna mounted on a
PC/ABS block to similar a free-space condition. 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.