Details
| Original language | English |
|---|---|
| Article number | 6490399 |
| Pages (from-to) | 1982-1989 |
| Number of pages | 8 |
| Journal | IEEE Transactions on Instrumentation and Measurement |
| Volume | 62 |
| Issue number | 7 |
| Publication status | Published - Jul 2013 |
Abstract
This paper presents a compact free-space measurement system for the characterization of dielectric materials within the X-band based on the line-network-network (LNN) calibration method. Using a pair of dielectric-filled horn antennas with enhanced directivity, the setup exhibits a total length of 250 mm between the antenna apertures and is suitable for measurements of planar samples with transverse dimensions equal to or greater than 250 mm × 250 mm. Based on 3-D field simulations and measurements, the assumptions of plane wave incidence on the sample and negligible diffraction effects at the sample edges are investigated. The scattering parameters of the sample are obtained according to the LNN calibration method. Remaining multipath propagation effects caused by reflections at the antennas and their fixtures are filtered out via time gating. The complex permittivity is finally calculated from the transmission scattering parameter using the Newton-Raphson method. Results for exemplary dielectrics are in good accordance with reference values.
Keywords
- Antennas, free-space measurement, line-network-network (LNN) calibration method, permittivity measurement, time gating
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Instrumentation
- Engineering(all)
- Electrical and Electronic Engineering
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In: IEEE Transactions on Instrumentation and Measurement, Vol. 62, No. 7, 6490399, 07.2013, p. 1982-1989.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Compact unfocused antenna setup for X-band free-space dielectric measurements based on line-network-network calibration method
AU - Orlob, Christian
AU - Reinecke, Tobias
AU - Denicke, Eckhard
AU - Geck, Bernd
AU - Rolfes, Ilona
PY - 2013/7
Y1 - 2013/7
N2 - This paper presents a compact free-space measurement system for the characterization of dielectric materials within the X-band based on the line-network-network (LNN) calibration method. Using a pair of dielectric-filled horn antennas with enhanced directivity, the setup exhibits a total length of 250 mm between the antenna apertures and is suitable for measurements of planar samples with transverse dimensions equal to or greater than 250 mm × 250 mm. Based on 3-D field simulations and measurements, the assumptions of plane wave incidence on the sample and negligible diffraction effects at the sample edges are investigated. The scattering parameters of the sample are obtained according to the LNN calibration method. Remaining multipath propagation effects caused by reflections at the antennas and their fixtures are filtered out via time gating. The complex permittivity is finally calculated from the transmission scattering parameter using the Newton-Raphson method. Results for exemplary dielectrics are in good accordance with reference values.
AB - This paper presents a compact free-space measurement system for the characterization of dielectric materials within the X-band based on the line-network-network (LNN) calibration method. Using a pair of dielectric-filled horn antennas with enhanced directivity, the setup exhibits a total length of 250 mm between the antenna apertures and is suitable for measurements of planar samples with transverse dimensions equal to or greater than 250 mm × 250 mm. Based on 3-D field simulations and measurements, the assumptions of plane wave incidence on the sample and negligible diffraction effects at the sample edges are investigated. The scattering parameters of the sample are obtained according to the LNN calibration method. Remaining multipath propagation effects caused by reflections at the antennas and their fixtures are filtered out via time gating. The complex permittivity is finally calculated from the transmission scattering parameter using the Newton-Raphson method. Results for exemplary dielectrics are in good accordance with reference values.
KW - Antennas
KW - free-space measurement
KW - line-network-network (LNN) calibration method
KW - permittivity measurement
KW - time gating
UR - http://www.scopus.com/inward/record.url?scp=84879066705&partnerID=8YFLogxK
U2 - 10.1109/TIM.2013.2246905
DO - 10.1109/TIM.2013.2246905
M3 - Article
AN - SCOPUS:84879066705
VL - 62
SP - 1982
EP - 1989
JO - IEEE Transactions on Instrumentation and Measurement
JF - IEEE Transactions on Instrumentation and Measurement
SN - 0018-9456
IS - 7
M1 - 6490399
ER -