In response to the issue of electrical interference in unmanned surface vessel compartments caused by poor electromagnetic compatibility of the antennas, a method of filling the compartment orifice with conductive material is proposed in combination with the structure of the unmanned surface vessel, to achieve the effect of shielding antenna electromagnetic interference. Firstly, by controlling the interfering variables, the interference source is located; then, based on the identification of the antenna as the interference source, the electric field strength of the antenna radiation at the equipment location is simulated and calculated. When rubber is used to fill the compartment orifice, the highest field strength inside the compartment reaches 50V/m. However, with the use of conductive materials for filling, the field strength at the equipment location is close to 0, achieving the effect of shielding antenna radiation interference and restoring normal operation of the compartment's electrical equipment. Finally, the effectiveness of this method is verified through experiments, and it is recommended to plan the distance between the unmanned surface vessel's antennas and equipment reasonably during the early stages of design.
KEYWORDS: Crosstalk, Optical character recognition, Signal attenuation, Fourier transforms, Signal analyzers, Interference (communication), Data transmission, Tunable filters, Signal to noise ratio, Modulation
With the rapid development of automobiles towards electrification and intelligence, 5nm Qualcomm 8295 flagship chip has been gradually applied to traditional and new energy vehicles, which brings higher requirements for high-quality signal transmission. In this study, the signal quality evaluation methods of the insertion loss to crosstalk ratio and the integrated crosstalk noise are explored. In addition, two kinds of differential via optimization schemes with the signal-ground ratio of 1:2 and 2:3 are proposed, respectively. The results show that the performance of the new differential via structure is improved significantly, which provides a reliable solution for high-quality signal transmission.
With the rapid development of integrated circuits, its electromagnetic compatibility becomes more and more prominent. This paper gives the most commonly used test standards and methods of electromagnetic emission, electromagnetic immunity and pulse immunity at home and abroad. In addition, from the aspects of test equipment, test conditions, test arrangement and test procedures, the TEM cell method and wideband TEM cell method of integrated circuit radiation emission measurement are introduced in detail. Suggestions on the use of two testing methods are given. The actual test results measured by this test method are analyzed. According to the actual test experience, this paper briefly introduces the differences between TEM cell method and wideband TEM cell method and stripline method, and gives the test points for attention.
KEYWORDS: Electromagnetism, Signal generators, Antennas, Data modeling, Electromagnetic interference, Amplifiers, Signal analyzers, Signal processing, Spectrum analysis, Frequency modulation
The increasing complexity of the electromagnetic environment poses a threat to the reliability of intelligent connected vehicles. Carrying out performance verification of intelligent connected vehicles in different electromagnetic scenes plays an important role in ensuring the safety of vehicles. A method for constructing electromagnetic scenes in the 10m semi-anechoic chamber is presented in the paper. By constructing the electromagnetic environment collection system, the main technical indicators of the electromagnetic environment collection related to the intelligent connected vehicles are analyzed, and the construction scheme of the electromagnetic environment scene library is studied. Based on the electromagnetic environment simulation system, the effectiveness of the electromagnetic scene reproduction is verified from the two aspects of test result comparison and signal comparison, which provides support for the test and verification of the electromagnetic compatibility performance of the intelligent connected vehicles in the laboratory.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.