圆柱型谐振腔最大电磁能量耦合方法

利用微波谐振腔的谐振频率随腔内介质不同而变化这一特性可以实现液体、气体介电常数的精确测量,其中微波谐振腔与外波导的能量耦合程度将直接影响整个测试系统的性能和精度.根据电磁波在波导中的传播特性建立微波谐振腔的耦合模型.通过对谐振腔的耦合孔和波导耦合面电磁能量的仿真与分析,选择最佳匹配连接方式,使谐振腔有最大的电磁能量输出.仿真实验证明,连接波导中心与谐振腔耦合孔中心重合处不是电磁能量最大耦合位置,只有连接波导中心偏离谐振器耦合孔中心一定位置才能得到电磁能量的最大耦合.

Coupling Method of Maximum Electromagnetic Energy about Cylindrical Cavity Resonator

Using the characteristic that resonant frequency will change along with different medium pass through the microwave cavity resonator,can realize accurately measurement of the liquid and gas dielectric constant.But the energy coupling degree between microwave cavity resonator and external waveguide directly affects the performance and precision of measurement system.According to the propagation characteristics of electromagnetic wave in waveguide,a couple model is established.By simulation and analyzing the electromagnetic energy of resonance coupling hole and waveguide coupling face,choosing best coupling match method,to make the resonance export the maximal electromagnetic energy,Simulation experiment proves that the superposition between the resonance coupling hole center and waveguide center isn't the best electromagnetic energy coupling position,the best coupling of electromagnetic energy can be got only at the position that the waveguide center departure a certain distance from the resonance coupling hole center.