Anritsu HFE0903_Cree 电路图.pdf

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1、70High Frequency Electronics High Frequency Products LINEAR PA MODULE 30-Watt Module Covers the 1930-1990 PCS Wireless Band C ree Microwave has introduced a new amplifier module for linear PCS systems. The PFM19030SM com- bines a 5 watt LDMOS driver and a 30 watt LDMOS PA with internal interstage ma

2、tching.The input and output are partially matched, with recommended source and load impedances of 19 +j1.9 and 21 +j6.3 respectively. Internal Thermal Sensing Each silicon LDMOS device in the PFM19030SM has an internal sense FET for improved bias control. These FETs are fabri- cated from the same ep

3、i material as the power devices, with identical physical characteris- tics. If desired by the designer, these devices may be used to drive external bias circuitry to maintain optimum performance over a wide range of operating temperatures. The module is constructed on a high con- ductivity copper ba

4、se, 40 mils thick, that is thermally matched to typical PCB material. The base serves as a heat spreader in surface mount installations; data sheet thermal speci- fications were obtained with the module sol- dered to a 20 mil thick PCB with an array plated-through holes for electrical grounding and

5、heat sinking. At 1 dB gain compression, the power out- put is nominally 45 dBm, with approximately 0.5 dB variation with a 2 volt change in Vdc. With this 30 watts peak power capability, the amplifier module provides 5 watts average power output in IS95 CDMA service. Small signal gain is 28 dB minim

6、um, power-added efficiency is 20% and ACPR is 49 dBc, as shown in the accompanying graph. Cree Microwave Tel: 408-962-7783 HFeLink 302 This device is an easy-to- implement module for IS95 CDMA, WCDMA, and EDGE applications, combining two stages of amplification with interstage matching Cree Microwave offers the PFM19030SM sur- face mount LDMOS module for PCS base station designs. IS95 CDMA ACPR and efficiency data for the PFM19030 amplifier module. From September 2003 High Frequency Electronics Copyright 2003 Summit Technical Media, LLC RadioFans.CN 收音机爱 好者资料库