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首页> 外文期刊>IEEE Transactions on Microwave Theory and Techniques >Measurements of Complex Permittivity at Millimeter-Wave Frequencies With an End-Loaded Cavity Resonator
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Measurements of Complex Permittivity at Millimeter-Wave Frequencies With an End-Loaded Cavity Resonator

机译:端腔谐振器在毫米波频率处的复介电常数的测量

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摘要

A novel cavity resonator method is proposed for measuring the complex permittivity of a dielectric plate in the millimeter-wave region. In this method, the dielectric plate is loaded at the end of the cavity resonator. The relative permittivity $varepsilon''$ and loss tangent ${rm tan}delta$ are determined from measured resonant frequency and unloaded $Q$ of the ${rm TE}_{011}$ mode. This structure prevents excessive lowering of the resonant frequency due to the placement of the dielectric plate sample in the cavity. The suppression of spurious modes and the design of the cavity resonator are discussed. The values of $varepsilon''$ and ${rm tan}delta$ were measured in the millimeter-wave range for low-temperature co-fired ceramic (LTCC), Al $_{2}$O$_{3}$ , and sapphire plates. The temperature dependence of the complex permittivity of the LTCC plate was measured at 34 GHz. The measurement accuracies are estimated to be within 0.6% for $varepsilon''$ , and within 10% for ${rm tan} delta$ of 10$^{-3}$ .
机译:提出了一种新颖的空腔谐振器方法,用于测量介电板在毫米波区域的复介电常数。用这种方法,将介电板装在腔谐振器的末端。相对介电常数$ varepsilon''$和损耗角正切$ {rm tan} delta $由实测的谐振频率和$ {rm TE} _ {011} $模式的空载$ Q $确定。这种结构防止了由于将介电板样品放置在空腔中而导致谐振频率的过度降低。讨论了杂散模式的抑制和谐振腔的设计。对于低温共烧陶瓷(LTCC),Al $ _ {2} $ O $ _ {3} $,在毫米波范围内测量了$ varepsilon''$和$ {rm tan} delta $的值。和蓝宝石板。在34 GHz下测量LTCC板的复介电常数与温度的关系。估计$ varepsilon''$的测量准确度在0.6%内,对于$$ {rm tan} delta $ 10 $ ^ {-3} $的测量准确度在10%以内。

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