# Research on the Relationship between Resistivity and Resistance between Two Points on RCS Test Model

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## Abstract

**:**

## 1. Introduction

- Propose an accurate method for measuring the resistance between two points on the model surface.
- Establish the relationship between the resistivity and resistance between two points at any interval on the model surface.

## 2. Theorical Model of Relationship between the Resistivity and Surface Resistance

## 3. Simulation Analysis of Resistance between Two Points on Model Surface

## 4. Experimental Verification of Four-Probe Method

#### 4.1. Experiments on ITO Conductive Films with Dimensions of 0.3 × 0.2

#### 4.2. Experiments on ITO Conductive Films with Other Dimensions

## 5. Experimental Comparison of the Accuracy of Two-Probe Method and Four-Probe Method

## 6. Conclusions

- (1)
- The theoretical model of the relationship between sheet resistance and resistance between two points on the conductive film is proposed.
- (2)
- The simulation method for the resistance between two points on the model surface is established.
- (3)
- The experimental results are highly consistent with the theoretical and simulated values, which further verifies the correctness of the theoretical model and the simulation method.
- (4)
- The measurement error of the two-probe method is significantly higher than that of the four-probe method, with an error of 150–200%.

- Fabrication of full-size/scaled model for RCS test. The method in this paper can more accurately judge whether the conductivity of the model surface sprayed with conductive paint satisfies the test requirements, thus effectively reducing the processing difficulty while maintaining the test accuracy.
- Determine if the coating of the aircraft’s cavity (such as the cockpit) fulfills the conductivity requirements. It can prevent the electromagnetic wave from entering the cavity, thus ensuring the stealth performance of the aircraft.

## Author Contributions

## Funding

## Institutional Review Board Statement

## Informed Consent Statement

## Data Availability Statement

## Conflicts of Interest

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Film Number | Sheet Resistance | Spacing between Points 2, 3 |
---|---|---|

#1 | $1.5\mathsf{\Omega}/\square $ | 2 cm, 4 cm, 6 cm, 8 cm, 10 cm |

#2 | $6.1\mathsf{\Omega}/\square $ | 2 cm, 4 cm, 6 cm, 8 cm, 10 cm |

#3 | $13.5\mathsf{\Omega}/\square $ | 2 cm, 4 cm, 6 cm, 8 cm, 10 cm |

#4 | $50\mathsf{\Omega}/\square $ | 2 cm, 4 cm, 6 cm, 8 cm, 10 cm |

Film Number | Sheet Resistance | Spacing between Points 2 and 3 |
---|---|---|

#1 | $1.5\mathsf{\Omega}/\square $ | 2 cm, 4 cm, 6 cm, 8 cm, 10 cm |

#2 | $6.1\mathsf{\Omega}/\square $ | 2 cm, 4 cm, 6 cm, 8 cm, 10 cm |

#3 | $13.5\mathsf{\Omega}/\square $ | 2 cm, 4 cm, 6 cm, 8 cm, 10 cm |

#4 | $50\mathsf{\Omega}/\square $ | 2 cm, 4 cm, 6 cm, 8 cm, 10 cm |

Film Number | Size | Sheet Resistance | Spacing between Points 2,3 |
---|---|---|---|

#5 | 0.5 m × 0.4 m | $35\mathsf{\Omega}/\square $ | 100 mm, 200 mm, 300 mm |

#6 | 0.5 m ×0.4 m | $5.8\mathsf{\Omega}/\square $ | 100 mm, 200 mm, 300 mm |

#7 | 0.48m × 0.16m | $38\mathsf{\Omega}/\square $ | 4 mm, 20 mm, 40 mm, 60 mm, 80 mm, 100 mm |

#8 | 0.48 m × 0.12 m | $36\mathsf{\Omega}/\square $ | 4 mm, 20 mm, 40 mm, 60 mm, 80 mm, 100 mm |

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**MDPI and ACS Style**

Wu, Y.; Huang, J.; Song, L.
Research on the Relationship between Resistivity and Resistance between Two Points on RCS Test Model. *Sensors* **2023**, *23*, 1139.
https://doi.org/10.3390/s23031139

**AMA Style**

Wu Y, Huang J, Song L.
Research on the Relationship between Resistivity and Resistance between Two Points on RCS Test Model. *Sensors*. 2023; 23(3):1139.
https://doi.org/10.3390/s23031139

**Chicago/Turabian Style**

Wu, Yacong, Jun Huang, and Lei Song.
2023. "Research on the Relationship between Resistivity and Resistance between Two Points on RCS Test Model" *Sensors* 23, no. 3: 1139.
https://doi.org/10.3390/s23031139