在发送方向，收发信机向功率放大器提供射频信号，功率放大器根据给定调制类型的增益和斜坡信息对信号进行放大。
In the transmit direction, the transceiver provides RF signals to the power amplifier, which amplifies the signals based on gain and ramp information for a given modulation type.
基于LDMOS FET的高增益、高输出功率、低功耗和良好的散热特性，分别设计了S波段45w和180w固态功率放大器。
Considering LDMOS FETs high gain, high output power, low power loss and efficient heat dissipation, a S-band, 45w and 180w solid state power amplifier is designed.
功率放大器（12）具有分别用于这两 种调制格式的固定增益模式和可变增益模式。
The power amplifier (12) has a fixed gain mode and a variable gain mode used for the two modulation formats, respectively.
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