ID2011 PDF预览

ID2011

更新时间: 2025-07-13 23:57:47
品牌 Logo 应用领域
其他 - ETC 射频脉冲
页数 文件大小 规格书
16页 1468K
描述
RF Coaxial Lightning and EMP Protection

ID2011 数据手册

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ID 2011  
V4.00  
RF Coaxial Lightning  
& EMP Protection  
In-line RF Coaxial Protection Against Lightning  
& EMP  
Ideal Protection for Cellular Infrastructure  
Equipment  
Available in ␭ր4 Stub Tuner or Gas Discharge  
Tube Formats  
Maintains Protection after Initial Strike or Pulse  
M/A-COM offers a complete series of RF Coaxial Lightning &  
EMP Protection Devices for use in cellular infrastructure appli-  
cations. EMP (electro-magnetic pulse) occurs primarily as a  
result of direct lightning strikes to infrastructure equipment  
which can produce fast rising electric fields within micro  
seconds. These electric fields induce high voltage pulses  
through unprotected antennas and coaxial transmission  
cables which can ultimately lead directly to the primary com-  
munication equipment. The EMP threat, generated from un-  
predictable lightning strikes is a serious concern for cellular  
operators around the world. Damage from a lightning strike  
can result in costly repair of equipment as well as significant  
loss of airtime service to subscribers.  
/4 Stub Tuners  
/4 stub tuners are three port coaxial devices. The third port,  
extending from the main electrical path, serves as a  
terminated short circuit element at a predetermined distance  
from the RF transmission path. This distance is designed to  
be exactly one quarter wavelength at the desired centering  
frequency (Fo). /4 stub tuners offer very low VSWR and  
feature very high attenuation of incoming pulses but must be  
applied across relatively narrow bandwidths (± 70 MHz).  
M/A-COM offers standard designs for the most popular  
cellular frequency bands to facilitate usage without the need  
for a custom design. Stub tuners offer the greatest protection  
for sensitive electronic components as they have neither the  
sparkover or residual voltage characteristics of GDT devices.  
Stub tuners are extremely reliable and maintenance free  
since they incorporate no active components. Standard stub  
tuner designs exist for GSM, PCS 1900 and DCS 1800  
frequencies with a wide variety of connector interfaces such  
as Type N and 7-16 available. Cable assemblies, including  
low loss cable options, are also available to provide complete  
in-line solutions for base station design.  
M/A-COM RF coaxial lightning protection (LP) devices have  
been designed for use in commonly deployed cellular  
infrastructure including GSM, NAMPS, PCS 1900 and  
DCS 1800 operating formats. The use of coaxial lightning  
protection has two primary benefits for cellular applications.  
First, RF coaxial lightning protection can easily be inserted  
into existing infrastructure architecture either as a cable  
assembly or as an in-line adapter. This facilitates cell site  
design and retrofit capabilities. Secondly, the RF coaxial  
protection has been designed to facilitate and not degrade  
RF performance during normal operation of the system.  
Surge Protectors  
These devices incorporate internal gas discharge tube (GDT)  
technology to provide a low impedance path to discharge the  
EMP to ground. The GDT is hermetically sealed with an inert  
gas which is not radioactive and requires no special handling.  
GDT devices are broadband due to their inherently small  
capacitance and cover frequencies up to 2.5 GHz. Once a  
GDT device has been activated with an impulse and the  
voltage level dissipated, the device becomes inactive and will  
require subsequent maintenance or replacement. Surge  
protectors are available in convenient bulkhead mounting  
configurations with a wide variety of standard interface  
choices including Type N, 7-16 and SMA.  
Call your local M/A-COM sales office or global Applications  
Engineering group for more information on our RF coaxial  
lightning protection. M/A-COM is an ISO-9001 globally  
certified manufacturer.  
Specifications Subject to Change Without Notice.  
M/A-COM, Inc.  
1
North America: Tel. (800) 366-2266  
Fax (800) 618-8883  
Asia/Pacific: Tel. +85 2 2111 8088  
Fax +85 2 2111 8087  
Europe: Tel. +44 (1344) 869 595  
Fax +44 (1344) 300 020  

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封装:U1; 额定电流:20A; 芯片类型:Trench-FS Gen1; 额定电压:60