A Method and Device for Calculating Coupling Interference Between Cables and Microstrip Antennas in a Shielding Cavity
A microstrip antenna, coupled interference technology, applied in computing, measuring devices, computer-aided design, etc., can solve problems such as large storage space and long computing time
Active Publication Date: 2021-08-20
HUNAN UNIV
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However, due to the fine division of the grid in the TVU system, using the above numerical method to analyze the electromagnetic coupling effect requires a long calculation time and a large amount of storage space
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[0048] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.
[0049] The method for calculating the coupling interference of cables to microstrip antennas in the shielding cavity provided by this application can be applied to such as figure 1 shown in the application environment. Wherein, the shielding cavity is a geometric structure composed of good conductors, and the thickness of the shielding cavity wall is negligible relative to the volume of the shielding cavity. Inside the shielding cavity is a microstrip antenna with a current value I and a current direction as shown in the figure, and a cable. The radiated electric field gen...
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The present application relates to a method and a device for calculating the coupling interference of a cable in a shielding cavity to a microstrip antenna. The method includes: equating the cables in the shielding cavity to a plurality of electric dipoles, calculating the radiation electric field of the electric dipoles in the coordinate system preset in the shielding cavity according to the cavity eigenmode theory, superimposing the electric The radiated electric field of the dipole results in the radiated electric field of the cable. According to the cable radiation electric field, the tangential electric field and vertical electric field of the surface of the microstrip antenna along the direction of the cable are obtained, which are input into the preset Agrawal model to obtain the field coupling source vector of the microstrip antenna. Input the field coupling source vector into the pre-set BLT equation to obtain the coupling voltage of the microstrip antenna. The above method solves the problem of calculating the radiated electric field of long cables in the shielded cavity, avoids the problem of long calculation time and large storage space when using numerical methods to solve closed electrically large targets, and can be applied to the same type of scenarios. Avoid repetitive modeling.
Description
technical field [0001] The present application relates to the technical field of microstrip antennas, in particular to a method and device for calculating coupling interference of cables in a shielding cavity to microstrip antennas. Background technique [0002] As the carrier of signal and energy transmission in electronic systems, cables are an indispensable part of realizing system functions. Because the cable has an antenna effect, it provides a main coupling channel for radiated electromagnetic interference, which makes the electromagnetic environment inside the electronic system very complicated, especially for the shielded cavity with resonance phenomenon. Antennas, as part of a transmitting or receiving system, are very sensitive to radiated coupled electromagnetic interference within the operating bandwidth. The electromagnetic energy generated by the internal cables of the system is coupled into the microstrip antenna through field lines, generating voltage and cu...
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IPC IPC(8): G01R31/00G06F30/20G06F113/16
CPCG01R31/001G06F30/20G06F2113/16
Inventor 李高升肖培蒋建辉李佳维邱永峰刘柱
Owner HUNAN UNIV