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Inter‑Skeleton Conductive Routes Tuning Multifunctional Conductive Foam for Electromagnetic Interference Shielding,Sensing and Thermal Management

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Nano-Micro Letters 2025年第3期17卷 19-36页

作者： Xufeng Li Chunyan Chen Zhenyang Li Peng Yi Haihan Zou Gao Deng Ming Fang Junzhe He Xin Sun Ronghai Yu Jianglan Shui Caofeng Pan Xiaofang Liu School of Materials Science and Engineering Beihang UniversityBeijing 100191People’s Republic of China institute of Atomic Manufacturing Beihang UniversityBeijing 100191People’s Republic of China Tianmushan Laboratory Xixi Octagon CityYuhang DistrictHangzhou 310023People’s Republic of China Science and Technology On Electromagnetic scattering Laboratory Beijing Institute of Environmental FeaturesBeijing 100854People’s Republic of China

Conductive polymer foam(CPF)with excellent compressibility and variable resistance has promising applications in electromagnetic interference(emI)shielding and other integrated functions for wearable ***,its insufficient change amplitude of resistance with compressive strain generally leads to a degradation of shielding performance during ***,an innovative loading strategy of conductive materials on polymer foam is proposed to significantly increase the contact probability and contact area of conductive components under *** inter-skeleton conductive films are constructed by loading alginate-decorated magnetic liquid metal on the polymethacrylate films hanged between the foam skeleton(denoted as AMLM-PM foam).Traditional point contact between conductive skeletons under compression is upgraded to planar contact between conductive ***,the resistance change of AMLM-PM reaches four orders of magnitude under ***,the inter-skeleton conductive films can improve the mechanical strength of foam,prevent the leakage of liquid metal and increase the scattering area of em ***-PM foam has strain-adaptive emI shielding performance and shows compression-enhanced shielding effectiveness,solving the problem of traditional CPFs upon *** upgrade of resistance response also enables foam to achieve sensitive pressure sensing over a wide pressure range and compression-regulated Joule heating function.

关键词： Inter-skeleton conductive films Conductive polymer foam Liquid metal Electromagnetic interference shielding

Fractal Linear Arrays

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Chinese Physics Letters 1998年第2期15卷 140-142页

作者： XU Liang WU Zhen-sen WANG Wen-bing institute of Antenna and em scattering Xidian UniversityXi’an 710071 institute of Radiowave Xian Jiaotong UniversityXi’an 710049

The general expression of the fractal linear array factors is *** similarity of the patterns and their fractal features are *** relation between the maximum side-lobe and the fractal dimension is shown.

关键词： fractal similarity dimension

A COMBINED FULL-WAVE BCG-FFT METHOD FOR RADIATION OF MICROSTRIP ANTENNA ARRAYS

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Journal of Electronics(China) 2001年第4期18卷 351-354页

作者： Zhang Hou Peng Hongli Liu Qizhong Yin Yingzeng Gong Shuxi (institute of antennas and em scattering, Xidian University, Xi’an 710071) institute of antennas and em scattering Xidian University Xi’an

A method of combining BiConjugate Gradient(BCG) with Fast Fourier Transform(FFT) to analyze the radiation of microstrip antenna arrays is presented, where the spatially discrete BCG-FFT for analyzing microstrip structure is used and the del operators on Green's functions are transferred from the singular kernel to the expansion and testing functions. The resultant equations are solved by using BCG method in which the matrix-vector product is evaluated efficiently with FFT. The calculated patterns are in good agreement with the measured data.

关键词： Microstrip antenna arrays BCG-FFT method

RIGOROUS FULL-WAVE ANALYSIS OF THE BASE-STATION antennas

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Journal of Electronics(China) 2002年第3期19卷 324-328页

作者： Chen Shengbing Zhang Fushun Jiao Yongchang Sun Baohua(institute of antennas and em scattering, Xidian University, Xi’an 710071) institute of antennas and em scattering Xidian University Xi’an

Rigorous analysis of the Base-Station (BS) antennas with reflector is made in this letter. The wire-grid modeling of BS antenna is established. In order to improve the solution accuracy and efficiency, some efficient techniques such as three-term sinusoidal interpolation basis function and discrete wavelet transform are used. Numerical examples considered here are the typical vertically polarized and the dual-polarized BS antennas. The calculated results for the vertically polarized BS antenna are in good agreement with the measured data, which show that the analysis modeling used is accurate and reliable.

关键词： Base-station antenna Method of moment Wire-grid modeling

ANALYSIS OF MONOPOLE ANTENNA ON CIRCULAR DISC BY MODE MATCHING

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Journal of Electronics(China) 2001年第2期18卷 185-187页

作者： Sun Baohua Zhang Pushun Liu Qizhong (institute of antennas and em scattering, Xidian University, Xi’an 710071) institute of antennas and em scattering Xidian University Xi’an

Mode matching is used for the analysis of monopole antenna on circular disc, which is achieved by developing a novel model consisting of two artificial ground planes above and bellow the monopole antenna. Using this model, the input impedance is computed and compared with measured data reported in literatures, and excellent agreement is observed.

关键词： Monopole antenna Mode matching Circular disc

HYBRID MM/MoL APPROACH FOR ANALYZING A COAXIAL FED MONOPOLE ANTENNA

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Journal of Electronics(China) 2002年第1期19卷 84-88页

作者： Sun Baohua Ji Yicai Liu Qizhong (institute of antennas and em scattering, Xidian University, Xi’an 710071) institute of antennas and em scattering Xidian University Xi’an

A new hybrid technique is presented, which combines the Mode Matching (MM) method with the Method of Lines (MoL) to analyze a coaxial fed monopole antenna. The monopole antenna is dealt with using the MoL, while the MM method is used to analyze the coaxial feed system. Then, the two sub-problems are combined by enforcing point matching at the common regional interfaces. The input impedance is computed and compared with the measured data reported in literature, and the excellent agreement is observed.

关键词： Monopole antenna MoL MM method

A NEW MOMENT METHOD FOR THE FAST AND ACCURATE ANALYSIS OF NORMAL MODE HELICAL antennas

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Journal of Electronics(China) 2001年第4期18卷 355-358页

作者： Ji Yicai Sun Baohua Liu Qizhong (institute of antennas and em scattering, Xidian University, Xi’an 710071) institute of antennas and em scattering Xidian University Xi’an

In this letter, a new moment method using helical segments is presented to model Normal Mode Helical Antenna (NMHA). Using this method, the NMHA can be modeled by a few segments. The current distributions and radiation patterns of some NMHAs are calculated.A comparison is made between results obtained using this helical segment algorithm and a linear segment algorithm, and the results of the two algorithms agree fairly well. When calculating the impedance matrix [Z], all the elements of the matrix can be obtained by only calculating a few elements with the application of the symmetric and periodic characteristics of the ***, the CPU time and the memory storage are significantly reduced, with the accuracy and speed enhanced.

关键词： Moment method Helical segment Normal Mode Helical Antenna (NMHA)

A COMPACT QUADRATURE FEEDING CIRCUIT FOR CIRCULARLY POLARIZED ANTENNA

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Journal of Electronics(China) 2002年第3期19卷 329-331页

作者： Dong Yuliang Tian Buning Tang Song(Research Inst. of antennas and em scattering, Xidian Univ., Xi’an 710071 ] Research Inst. of antennas and em scattering Xidian Univ. Xi’an

A novel compact quadrature feeding circuit for a circularly polarized antenna is described. The equivalent circuit method in microwave network theory is used and the conventional directional coupler is converted to a new quadrature feeding circuit. This feeding circuit has the same characteristics as the conventional directional coupler but its size is only about one fourth of that of the latter. The formulas for designing the feeding circuit are given. The optimized results obtained by using the software ENSemBLE are also reported.

关键词： Microstrip antenna Circular polarization Equivalent circuit Microwave

ANALYSIS OF THE scattering OF RIVET ON AIRCRAFT

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Journal of Electronics(China) 2002年第4期19卷 434-437页

作者： Guo Jingli Ji Yicai Liu Qizhong (institute of Antenna & em scattering, Xidian University, Xi’an 710071) institute of Antenna & em scattering Xidian University Xi’an

This letter investigates the scattering characteristic of the rivets on aircraft. The Electric Field Integral Equation (EFIE) is used with the moment method to calculate the current distribution on the surface of the rivet. With the application of Gaussian integral corresponding triangular cell, the time to fill the Z matrix is greatly reduced. Finally, the RCS of a type of rivet on aircraft is analyzed.

关键词： Moment method Radar Cross Section(RCS) Aircraft Rivet