对谐振膜片进行了数学模型分析，并设计了基于数字闭环方法的谐振膜式密度传感器整体结构。
On basis of analyzing the mathematical models of resonant diaphragm, a integral structure of resonant diaphragm density sensor is designed based on the method of digital closed-loop.
提出了几种具体的微波结构来实现谐振型耦合结构：包括短路支节型、双口膜片型和谐振柱型。
Several real microwave structures have been proposed, including shorting-circuit stub type, dual-iris type and resonant post type.
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