Method for predicting electrical properties of deformed log-periodic antennae based on electromechanical coupling model

A log-periodic antenna, electromechanical coupling technology, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problems of reducing antenna gain, destroying the non-frequency-variable characteristics of several-period antennas, and affecting the far-field pattern of the antenna, etc. Achieve the effect of reducing development cost and shortening development cycle

Inactive Publication Date: 2011-11-23
王从思
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Problems solved by technology

The deformation caused by these factors will change the length of the assembly line and the position of the oscillator unit and its own shape, which will change the current distribution

Method used

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  • Method for predicting electrical properties of deformed log-periodic antennae based on electromechanical coupling model
  • Method for predicting electrical properties of deformed log-periodic antennae based on electromechanical coupling model
  • Method for predicting electrical properties of deformed log-periodic antennae based on electromechanical coupling model

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Embodiment Construction

[0049] The present invention will be described in further detail below with reference to the accompanying drawings.

[0050] refer to figure 1 , the concrete steps of the present invention are as follows:

[0051] Step 1: Establish the LPDA structure model

[0052] The LPDA structural finite element model is determined by the structural parameters of the LPDA's radiation element type, size, and arrangement, such as Figure 7 shown. The theoretical coordinates of each radiating element on the array are obtained from the finite element model

[0053] Step 2, determine the position offset of each radiation unit of LPDA

[0054] First, determine the constraints and boundary conditions of the LPDA, including the structural constraints of the LPDA's feed slot, and the location and direction of the load;

[0055] Secondly, different processing is carried out according to the type of load, such as wind load and self-weight, according to the constraints of the structure and the ...

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Abstract

The invention discloses a method for predicting electrical properties of deformed log-periodic antennae based on an electromechanical coupling model, aiming to mainly solve the problem of electromechanical separation in the log-periodic antennae. The method comprises the following steps: building a finite element model based on the structural design parameters of the log-periodic antennae, loading dead load, random wind and other environmental loads and carrying out finite element analysis to obtain the structure displacement field of the log-periodic antennae; utilizing the analysis results to obtain current distribution of oscillator units in the log-periodic antennae and phase difference caused by the positions and deflection of the oscillator units and computing the far field patternsof the log-periodic antennae according to the superposition theorem; and obtaining the electrical property parameters of the log-periodic antennae to realize electromechanical coupling analysis of the log-periodic antennae. The method can help the log-periodic antenna structural design personnel improve the antenna design and manufacturing quality.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a method for predicting the electrical performance of a horizontally polarized sector logarithmic period antenna array, which is used to guide the structural design and electrical performance simulation analysis and evaluation of the logarithmic period antenna. Background technique [0002] Log-periodic dipole antenna (LOG-PERIODIC DIPOLE ARRAYS) referred to as LPDA is a very wide-band antenna with simple structure and excellent performance. It is mainly used in communication, direction finding, search, electronic It has a wide range of uses in confrontation and other aspects. Simple example: in the short-wave band, it can be used as a communication antenna or direction-finding antenna that uses sky-wave propagation; It is often used as a feed source for parabolic reflectors, corner reflector antennas or lens antennas, as well as radiating elements in phased array antennas or c...

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Application Information

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IPC IPC(8): G01R31/00
Inventor 王从思王猛段宝岩保宏黄进徐慧娟吕晓方李兆朱敏波陈光达米建伟王伟
Owner 王从思
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