Lossy Flange for Open-Ended Rectangular Waveguide Materials Characterization

Case, Anna; McCarville, Aaron; Ghasr, Mohammad Tayeb; Zoughi, R.

doi:10.1109/i2mtc48687.2022.9806561

Cited by 1 publication

(1 citation statement)

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“…The circular waveguide probe operating in its TE01 mode does not suffer from using a finite flange, [5], unlike the more commonly used open-ended rectangular waveguide. The latter type of probe is adversely impacted by the use of a finite-sized flange, causing measurement errors when measuring thin and low-loss samples, [12], such as solid YSZ in most applications.…”

Section: Introductionmentioning

confidence: 99%

Microwave Complex Permittivity of Yttria-Stabilized Zirconia

Case,

Barvincak,

Zoughi

2023

IEEE Open J. Instrum. Meas.

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The complex permittivity of 8-mol yttria-stabilized zirconia (8-YSZ) in powder and sintered (i.e., solid) forms were measured from 32-40 GHz using a circular waveguide probe. This probe is suitable for measuring both the powder and solid forms of materials. Comparative completely-filled rectangular waveguide measurements of the powder were performed at three frequency bands to verify these results and also to extend the measured complex permittivity estimation frequency range. The results indicated good agreement between the two different measurement techniques. The complex permittivity of the 8-YSZ powder was measured to be (𝜖 𝑟 = 2.45 − 𝑗0.04). Conductor-backed solid 8-YSZ, representative of an in-service ceramic coating, was also measured using the circular waveguide probe. Complex permittivity was measured to be significantly higher (𝜖 𝑟 = 29.28 − 𝑗0.07) when the 8-YSZ was sintered into a solid form. This was attributed to densification and other effects occurring during the sintering process.

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Section: Introductionmentioning

confidence: 99%