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参数资料
| 型号： | PA.25A |
| 厂商： | Taoglas Limited |
| 文件页数： | 19/21页 |
| 文件大小： | 0K |
| 描述： | ANTENNA 6-BAND SMT |
| 标准包装： | 1 |
| 天线类型： | 芯片 |
| 频带数目： | 6 |
| 频率： | 824MHz ~ 960MHz，1.7GHz ~ 2.17GHz |
| VSWR： | 3 |
| 增益： | 1.76dBi，4.62dBi |
| 端子： | 表面贴装型 |
| 安装类型： | 表面贴装 |
| 高度（最大）： | 5mm |
| 包装： | 标准包装 |
| 其它名称： | 931-1060-6 |
6. Transmission Line and Matching Component
A matching component of a 2nH inductor
in parallel with PA.25 is required for the
PA.25 to have the optimal performance in
the evaluation board, located outside of the
ground plane in the space specified in the
above drawings.
The matching component in a device we
recommend starting with a 2.2 nH for short
ground planes (45-75 mm) and 6.8 nH for
larger ground planes (80-100 mm).
The inductor is strictly required in the
antenna integration (this lumped element
is considered as part of the antenna).
Is not possible to determine if further
improvement in matching is necessary
for a PCB in specific, but we recommend
incorporating in the design extra spaces
for a “pi” network in between the GSM
module and the edge of the ground plane.
The starting point will be putting a 0 ohm
resistor in series in the “pi” network (S1)
and the required 6.8 nH or 2 nH outside
of the ground plane (L1). With these
spaces we have 3 options for matching
topologies as in the next figures:
S3
S2
L1
Antenna
S1
Module
Component
Ground Plane Limit
“pi” matching network
Typical config
S3
S1
Typical config
S2
S1
Component types
Inductor
Capacitor
“L” and “Inverted-L” matching network
Further optimization could be done as part of a matching circuit to determine if more components are necessary in the “pi” network,
but cannot be determined before, until we test the board with the antenna on it.
SPE-11-8-061/G | page 19 of 21
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