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          EEPW首頁(yè) > 手機(jī)與無(wú)線通信 > 設(shè)計(jì)應(yīng)用 > 基于BLF888設(shè)計(jì)的500W RF廣播發(fā)射方案

          基于BLF888設(shè)計(jì)的500W RF廣播發(fā)射方案

          作者: 時(shí)間:2010-06-02 來(lái)源:網(wǎng)絡(luò) 收藏
          LDMOS 功率晶體管,用于和工業(yè)應(yīng)用。在UHF頻帶470 MHz 到860 MHz可提供平均功率110W,峰值包絡(luò)功率,功率增益19dB,漏極效率46%,VDS 電壓50 V,漏極靜態(tài)電流1.3A。本文主要介紹了主要特性和優(yōu)勢(shì),AB類共源寬帶放大器電路和元件列表以及PCB布局圖和元件布局圖。

          A 500 W LDMOS power transistor for broadcast transmitter applications and industrial applications. The transistor is optimized for digital applications and can deliver 110 W average DVB-T broadband over the full UHF band from 470 MHz to 860 MHz. The excellent ruggedness of this device makes it ideal for digital transmitter applications.

          主要特性和優(yōu)勢(shì):

          2-Tone performance at 860 MHz, a drain-source voltage VDS of 50 V and a quiescent drain current IDq = 1.3 A:

          Peak envelope power load power = 500 W

          Power gain = 19 dB

          Drain efficiency = 46 %

          Third order intermodulation distortion = 32 dBc

          DVB performance at 858 MHz, a drain-source voltage VDS of 50 V and a quiescent drain current IDq = 1.3 A:

          Average output power = 110 W

          Power gain = 19 dB

          Drain efficiency = 31 %

          Shoulder distance = 31 dBc (4.3 MHz from center frequency)

          Integrated ESD protection

          Advanced flange material for optimum thermal behavior and reliability

          Excellent ruggedness

          High power gain

          High efficiency

          Designed for broadband operation (470 MHz to 860 MHz)

          Excellent reliability

          Internal input matching for high gain and optimum broadband operation

          Easy power control

          Compliant to Directive 2002/95/EC, regarding Restriction of Hazardous Substances (RoHS)

          BLF888應(yīng)用:

          Communication transmitter applications in the UHF band

          Industrial applications in the UHF band


          圖1。BLF888 AB類共源寬帶放大器電路

          AB類共源寬帶放大器元件列表:




          圖2。AB類共源寬帶放大器PCB布局圖

          圖3。AB類共源寬帶放大器元件布局圖


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