从等效电路分析入手，讨论了(1+1/2)腔这种非对称的短腔链的谐振工作模式，求出非对称短腔链的色散方程，得到(1+1/2)腔工作于π/6、π/2、5π/6模式的结论rn，这种工作模式异于传统的对称腔链的0、π/2、π工作模式%The resonant coupling mode of (1+1/2) cavities was discussed in this paper. By analyzing the equivalent circuit, a chromatic dispersion equation for chain of unsymmetrical short cavities was obtained and arn conclusion, i.e. (1+1/2) cavities worked under the condition of π/6, π/2 and 5π/6 modes, was derived. This mode is different from the traditionarnl 0, π/2 and π modes for chain of symmetrical cavities.
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