Design and implement of four-channel low-IF receiver chip in S band
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摘要:
基于有源相控阵雷达的应用，设计了一款S波段四通道低中频接收芯片，射频接收信号为2.2~2.5 GHz，中频信号为2~6 MHz可调.为满足T/R组件低成本、轻量化的要求，芯片集成了四条接收通道、本振通路和数字控制等模块.针对多通道芯片容易产生耦合的现象，采用了多种物理布局方式提高通道隔离.采用SMIC 0.13 μm CMOS工艺进行了设计仿真和流片，芯片面积为3.91 mm×3.66 mm。测试结果表明，四通道低中频接收电路增益调整范围≥58.29 dB，通道噪声系数≤9.25 dB，通道隔离度≥32.2dB.
Abstract:Based on the application of the active phased array radar, this paper presents a low-immediate frequency(IF) receiver in S band with four channels and 2.2~2.5 GHz radio frequency(RF) input and 2~6 MHz IF.The receiver features a high integration to improve the T/R modules cost and weight properties, consisting of four channels and local path(LO) and digital control modules. In order to compensate for crosstalk among four channels, multiple layout techniques are introduced. The circuit was fabricated based on the SMIC 0.13 μm CMOS process, occupying a die area of 3.91 mm×3.66 mm. The experimental results show that the gain adjustment range of four-channel low-IF receiver achieves ≤9.25 dB NF, the dynamic gain is above 58.29 dB and the channel isolation is above 32.2 dB.
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Key words:
- four channels /
- low_IF Receiver /
- passive mixer /
- image rejection /
- channel isolation
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