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  [组图]Mimix WiMAX 8W功率放大器方案           ★★★ 【字体:
Mimix WiMAX 8W功率放大器方案
作者:Mimix    文章来源:Mimix    点击数:    更新时间:2008-4-7    
Mimix公司的CHV2720-QJ是高度线性的单级AB类的InGaP HBT功率放大器,工作频率2.3 -2.7 GHz,增益为12 dB,1 dB压缩点的输出功率为8W,单点源工作电压为5V-12V,非常适合用于2.3 -2.7 GHz频段WiMAX设备的驱动级。本文介绍了CHV2720-QJ的主要性能和电特性,应用电路,所用元件列表以及评估板的元件布局图。

2.3-2.7 GHz InGaP HBT 8W Linear Power Amplifier
The CHV2720-QJ is a high linearity single stage class AB Heterojunction Bipolar Transistor (HBT) power amplifier capable of 12 dB of gain, 8 Watt of power at 1 dB
compression and is housed in a 6X6mm QFN package. The CHV2720-QJ provides less than 2.5% EVM at 31dBm output power with 802.16 OFDM signal and peak to average
power ratio of 9 dB. The input of the device is fully matched and the output is internally pre matched to 6 ohm facilitating a simplified output matching approach. This product operates off a single supply voltage between 5V and 12V and includes an internal bias circuitry to enable exact setting of quiescent current using an external control voltage. The device is ideal as a final or driver stage for WiMAX equipment in the 2.3 -2.7 GHz bands.

主要特性:

P1dB, 8W
Power Gain, 12 dB
Efficiency, 25% @ 1W
Positive Voltage Supply, +5V to +12V
Integrated Active Bias Circuit
Control Voltage Allows Different Current Settings
Input Fully Matched Internally
Output Pre-Matched Internally
Thermally Efficient for Higher MTTF
RoHS Compliant 6X6mm QFN
Ideal for WiMAX and WiBRO Applications (802.16)







图1. CHV2720-QJ推荐的应用电路图
下表为所用元件表:





图2. CHV2720-QJ评估板布局图
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