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参数资料
| 型号： | B39431B3960B210 |
| 厂商： | EPCOS Inc |
| 文件页数： | 5/10页 |
| 文件大小： | 0K |
| 描述： | FILTER SAW 433.92MHZ SMD |
| 标准包装： | 9,000 |
| 频率： | 433.92MHz 中心 |
| 带宽： | 340kHz |
| 滤波器类型： | 带通 |
| 插入损耗： | 2.3dB |
| 应用： | 远程控制 |
| 封装/外壳： | 6-SMD，无引线 |
| 安装类型： | 表面贴装 |
| 包装： | 带卷 (TR) |
| 高度（最大）： | 0.033"（0.86mm） |
| 尺寸/尺寸： | 0.098" L x 0.079" W（2.50mm x 2.00mm） |
SAW Components
SAW RF filter
B3960
433.92 MHz
Data sheet
Matching network to 50 ? (element values depend on pcb layout and equivalent circuit)
Ls1
Ls2
Cp3
L s1 = 39 nH
L s2 = 39 nH
C p3 = 1.5 pF
Minimising the crosstalk
For a good ultimate rejection a low crosstalk is necessary. Low crosstalk can be realised with a good
RF layout. The major crosstalk mechanism is caused by the “ground-loop” problem.
Grounding loops are created if input-and output transducer GND are connected on the top-side of
the PCB and fed to the system grounding plane by a common via hole. To avoid the common
ground path, the ground pin of the input- and output transducer are fed to the system ground plane
(bottom PCB plane) by their own via hole. The transducers’ grounding pins should be isolated from
the upper grounding plane.
A common GND inductivity of 0.5nH degrades the ultimate rejection (crosstalk) by 20dB.
The optimised PCB layout, including matching network for transformation to 50 Ohm, is shown
here. In this PCB layout the grounding loops are minimised to realise good ultimate rejection
Optimised PCB layout for SAW filters in DCC6F package, pinning 1,4 (top side, scale 1:1)
The bottom side is a copper plane (system ground area). The input and output grounding pins are
isolated and connected to the common ground by separated via holes.
For good contact of the upper grounding area with the lower side it is necessary to place enough
via holes.
Please read cautions and warnings and
important notes at the end of this document.
5
May 15, 2013
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相关代理商/技术参数 |
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| B39431-B4039-Z610 | 制造商:EPCOS 制造商全称:EPCOS 功能描述:SAW Components Low Loss Filter for Mobile Communication 433,91 MHz |
| B39431B5055Z810 | 功能描述:信号调节 RF LOW LOSS 425MHZ RoHS:否 制造商:EPCOS 产品:Duplexers 频率:782 MHz, 751 MHz 频率范围: 电压额定值: 带宽: 阻抗:50 Ohms 端接类型:SMD/SMT 封装 / 箱体:2.5 mm x 2 mm 工作温度范围:- 30 C to + 85 C 封装:Reel |
| B39431R 820H210 | 制造商:TDK-EPC 功能描述:R 820 RESONATOR - Tape and Reel |
| B39431R 856H210 | 制造商:TDK-EPC 功能描述:R 856 RESONATOR - Tape and Reel |
| B39431R 860H210 | 制造商:TDK-EPC 功能描述:R 858 RESONATOR - Tape and Reel |
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