UHF-Band Radar Cross Section Measurements With Single-Antenna Reflection Coefficient Results

Jarvis, Rachel E.; Mattingly, Rylee G.; McDaniel, Jay W.

doi:10.1109/tim.2021.3102756

Cited by 12 publications

(3 citation statements)

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“…To suppress undesired reflections from the chamber walls and the fixtures used in this measurement, the chamber without test object was measured using the exactly same experimental parameters, and that background data was coherently subtracted from the measured data with the target placed [2], [3], [27]- [29]. If we denote the complex-valued data with and without the target by E s (k, r 0 ) and E b (k, r 0 ), respectively, the background-subtracted data E s (k, r 0 ) which was to be passed to the NFFFT algorithm is defined as follows:…”

Section: Overview Of the Measurementmentioning

confidence: 99%

Low-Cost Radar Cross Section Measurement With a Resin-Made Model Coated With Conductive Paste

Watanabe

Akamine

2023

IEEE Trans. Instrum. Meas.

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This article is intended to provide practical information about development of a cost-effective test model to achieve low-cost radar cross-section (RCS) measurement. To reduce the manufacturing cost of a model, two major possible approaches are: replacing the molding material with inexpensive one, and measuring a scaled-down model with a higher operating frequency. In this study, the former was achieved by using a resin-made model coated with conductive paste to imitate a complete metallic model. According to the scaling laws, the entire geometry, including the surface roughness of the model owing to the conductive paint, must be properly scaled down. As this roughness scaling is practically infeasible, we experimentally prove that the shape-only scaling is valid without the roughness scaling, provided that appropriate molding material is selected. As a preliminary study, two types of polyurethane resin with different density were tested for their suitability of the RCS measurement, and the resin with higher density was shown to be appropriate for the RCS test model. Based on this preliminary study, 1/20-and 1/40-scale aircraft models made with aluminum or polyurethane resin were manufactured, and their RCS were measured to demonstrate that the almost equivalent RCS patterns can be obtained; therefore, low-cost RCS testing was achieved by the resin-made scaled model. Index Terms-Radar cross-section (RCS), resin-made model, conductive paste, scale-model testing, near-field-to-far-field transformation (NFFFT).

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Section: Overview Of the Measurementmentioning

confidence: 99%

Low-Cost Radar Cross Section Measurement With a Resin-Made Model Coated With Conductive Paste

Watanabe

Akamine

2023

IEEE Trans. Instrum. Meas.

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“…Continuous-wave measurements traditionally measure RCS with a separate antenna for transmitting and receiving [8]. However, if two antennas are unavailable or the mutual coupling between two antennas is too high, a single antenna can be used to measure RCS [9]. RCS has been measured with a single antenna below 10 GHz without quantitative error analysis and at mm-wave with specialized hardware [10], [11].…”

Section: Introductionmentioning

confidence: 99%

“…The proposed procedures yield an average error of 3.62% for a 3.81 cm diameter metal sphere and 15.3% for a distributed OUT composed of four 2.54 cm spheres. This paper utilizes techniques from [9] and furthers the work by addressing challenges at W-band frequencies, including selecting the proper measurement geometry.…”

Section: Introductionmentioning

confidence: 99%

Methodology and Techniques for Highly-Precise Radar Cross Section Measurements at W-Band

Jarvis

McDaniel

2022

IEEE Access

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This paper explores the challenges of radar cross section (RCS) measurements at W-band and proposes several techniques to overcome these challenges to obtain an accurate RCS measurement. This paper combines S 11 measurements collected using traditional radio frequency (RF) hardware with post-processing algorithms to extract RCS values with a single antenna. Vector background subtraction and time-gating suppress unwanted reflections while increasing the system's dynamic range capability. Experiments are conducted at the University of Oklahoma's mm-Wave Laboratory with a Vector Network Analyzer (VNA) and frequency extender to evaluate the proposed measurement techniques. The setup is calibrated with a metal sphere, and the RCS of a smaller metal sphere and an arrangement of four spheres is extracted. The single sphere's RCS is measured with a 0.304 dBsm average error, and the distributed object under test (OUT) RCS is measured with a 1.60 dBsm average error from 80-90 GHz. Each OUT is placed on a 3D-printed pedestal, and the remainder of the test hardware is part of an existing mm-Wave antenna measurement configuration. The post-processing clutter cancellation techniques enable a flexible test configuration to isolate the OUT RCS without purchasing specialized hardware.

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Radar Cross Section Reduction of Microstrip Array Antenna Using FSS

Li,

Wang,

Ren

et al. 2023

2023 IEEE 11th Asia-Pacific Conference on Antennas and Propagation (APCAP)

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UHF-Band Radar Cross Section Measurements With Single-Antenna Reflection Coefficient Results

Cited by 12 publications

References 10 publications

Low-Cost Radar Cross Section Measurement With a Resin-Made Model Coated With Conductive Paste

Low-Cost Radar Cross Section Measurement With a Resin-Made Model Coated With Conductive Paste

Methodology and Techniques for Highly-Precise Radar Cross Section Measurements at W-Band

Radar Cross Section Reduction of Microstrip Array Antenna Using FSS

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