Detaylı Arama
İptal
Bulunan: 3 Adet 0.001 sn
- Eklemek veya çıkarmak istediğiniz kriterleriniz için 'VE' / 'VEYA' /'DEĞİL' seçeneğini kullanabilirsiniz.
- İptal tuşuna basarak normal aramaya dönebilirsiniz.
Filtreler
Filtreler
Bulunan: 3 Adet 0.001 sn
Veri Tabanları : IEEE Xplore ✕Konu Başlıkları : free-space ✕
Koleksiyon [1]
Araştırmacılar [1]
BM Sürdürülebilir Kalkınma [1]
Fakültesi / Enstitütü [1]
Yayın Türü [1]
Yayımlanma Yılı [2]
Dil [1]
Kaynak [3]
Veri Tabanları [3]
İndex Türü [2]
Yayıncı [1]
Bölümü [1]
Ulusal/Uluslararası [1]
Konu Başlıkları [21]
Erişime Açık

Broadband, Stable, and Noniterative Dielectric Constant Measurement of Low-Loss Dielectric Slabs Using a Frequency-Domain Free-Space Method

Mehmet ERTUĞRUL

A broadband, stable, and noniterative free-space method is proposed for dielectric constant ε′r determination of low-loss dielectric slabs from reflection-only measurements through simple calibration standards (reflect and air). It is applicable for dispersive samples and does not require thickness information. Simulations of nondisperive and dispersive samples are performed to validate our method. Dielectric constant measurements of polyethylene and polyoxymethylene samples (9–11 GHz) are carried out to examine the accuracy of our method.

Makale 2022 Mühendislik Fakültesi IEEE Transactions on Antennas and Propagation70 ( 12 ) 65 Görüntülenme
Erişime Açık

Improved Method for Permittivity Determination of Dielectric Samples by Free-Space Measurements

Mehmet ERTUĞRUL

A new deembedding technique is proposed for relative complex permittivity epsilon(r) determination of dielectric materials using gated free-space measurements. Its three main features are 1) it does not require any formal calibration procedure (calibration-free); 2) it is position-insensitive; and 3) it extracts ripple-free epsilon(r) due to gating process. The objective function derived to determine epsilon(r) by the proposed method is validated by free-space measurements of three dielectric samples (polypropylene, polyethylene, and polyoxymethylene). Besides, the accuracy of our method is co ...Daha fazlası

Makale 2022 Mühendislik Fakültesi IEEE Transactions on Instrumentation and Measurement71 86 Görüntülenme
Erişime Açık

Complex Permittivity and Thickness Evaluation of Low-Loss Dielectrics From Uncalibrated Free-Space Time-Domain Measurements

Mehmet ERTUĞRUL

A free-space time-domain method is proposed to retrieve dielectric constant (epsilon r), conductivity (sigma e), and thickness (d) of metal-backed low-loss dielectric samples using calibration-independent reflected power peak measurements. Its algorithm is validated by numerical calculations and simulations (CST Microwave Studio) using a sine-modulated Gaussian window. A sensitivity analysis is followed to examine its performance considering the dependencies of reflected power peaks with respect to epsilon r and sigma e. Free-space time-domain measurements have been implemented after transform ...Daha fazlası

Makale 2021 Mühendislik Fakültesi IEEE Transactions on Geoscience and Remote Sensing60 ( Published online: 02 July 2021 ) 108 Görüntülenme
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