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Готові списки джерел за темами / Nulling-antenna / Статті в журналах

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Статті в журналах з теми "Nulling-antenna"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 липня 2025

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1

Bucciarelli, M., D. Pastina, D. Cristallini, M. Sedehi, and P. Lombardo. "Integration of Frequency Domain Wideband Antenna Nulling and Wavenumber Domain Image Formation for Multi-Channel SAR." International Journal of Antennas and Propagation 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/2834904.

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Анотація:

A Multichannel Synthetic Aperture Radar (M-SAR) exploiting an antenna nulling based Electronic Counter-Counter Measures (ECCM) technique shall be able to cancel the effects of noise-like interferences over the collected SAR data. Since SAR systems often work with wide bandwidths to provide high resolution images, ECCM technique must account for the presence of wideband interference signal. In this paper we consider a wideband antenna nulling technique based on space-frequency adaptive nulling and we propose an integration of the WB antenna nulling scheme within the focusing algorithm for M-SAR

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2

Acharya, Om Prakash, Amalendu Patnaik, and Sachendra N. Sinha. "Null Steering in Failed Antenna Arrays." Applied Computational Intelligence and Soft Computing 2011 (2011): 1–9. http://dx.doi.org/10.1155/2011/692197.

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Анотація:

Antenna array pattern nulling is desirable in order to suppress the interfering signals. But in large antenna arrays, there is always a possibility of failure of some elements, which may degrade the radiation pattern with an increase in side lobe level (SLL) and removal of the nulls from desired position. In this paper a correction procedure is introduced based on Particle Swarm Optimization (PSO) which maintains the nulling performance of the failed antenna array. Considering the faulty elements as nonradiating elements, PSO reoptimizes the weights of the remaining radiating elements to resha

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3

Dufort, E. "An optical subarray antenna having antenna nulling applications." IEEE Transactions on Antennas and Propagation 35, no. 6 (1987): 643–51. http://dx.doi.org/10.1109/tap.1987.1144164.

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4

Ding, Tongyu, Shaoqing Zhang, Liang Zhang, and Yanhui Liu. "Smart Cylindrical Dome Antenna Based on Active Frequency Selective Surface." International Journal of Antennas and Propagation 2017 (2017): 1–14. http://dx.doi.org/10.1155/2017/5901625.

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In this paper, we proposed a beamforming antenna, which is realized using an omnidirectional antenna in the center surrounded by a cylindrical smart dome. The smart dome is made of 16 active frequency selective surface columns of which the amplitude and phase response can be continuously tuned by varying the bias voltages of the employed varactors. Thus, the performance of the proposed antenna could achieve higher gain, better nulling level, and more agility than many switch methods-based cylindrical reconfigurable antennas. Moreover, in order to overcome the unavailable analytical synthesis c

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5

Gong, Yanyun, Ling Wang, Rugui Yao, and Zhaolin Zhang. "A Robust Method to Suppress Jamming for GNSS Array Antenna Based on Reconstruction of Sample Covariance Matrix." International Journal of Antennas and Propagation 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/9764283.

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The Global Navigation Satellite System (GNSS) receiver is vulnerable to active jamming, which results in imprecise positioning. Therefore, antijamming performance of the receiver is always the key to studies of satellite navigation system. In antijamming application of satellite navigation system, if active jamming is received from array antenna main-lobe, main-lobe distortion happens when the adaptive filtering algorithm forms main-lobe nulling. A robust method to suppress jamming for satellite navigation by reconstructing sample covariance matrix without main-lobe nulling is proposed in this

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6

Georgiadis, Apostolos, Ana Collado, and Almudena Suarez. "Pattern Nulling in Coupled Oscillator Antenna Arrays." IEEE Transactions on Antennas and Propagation 55, no. 5 (2007): 1267–74. http://dx.doi.org/10.1109/tap.2007.895631.

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7

Ерохин, А. А. "Синтез "нулей" в диаграмме направленности частотно-независимой антенной решетки". Письма в журнал технической физики 47, № 7 (2021): 35. http://dx.doi.org/10.21883/pjtf.2021.07.50797.18469.

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Анотація:

A method for radiation pattern nulling of a frequency-invariant antenna array is proposed in the paper. Numerical experiments are carried out to determine the characteristics of the proposed method, a comparison is made with the existing wideband beamspace method.

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8

Aksoy, Ertugrul, and Erkan Afacan. "Planar antenna pattern nulling using differential evolution algorithm." AEU - International Journal of Electronics and Communications 63, no. 2 (2009): 116–22. http://dx.doi.org/10.1016/j.aeue.2007.11.006.

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9

Castella, F. R., and J. R. Kuttler. "Optimised array antenna nulling with phase-only control." IEE Proceedings F Radar and Signal Processing 138, no. 3 (1991): 241. http://dx.doi.org/10.1049/ip-f-2.1991.0031.

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10

Zheng, Xiao Zhe, Yu Hao Liu, and Cui Gai Lv. "Research on Anti-Jamming Algorithm Based on Beidou Satellite Navigation System." Applied Mechanics and Materials 380-384 (August 2013): 4128–31. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.4128.

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Анотація:

According to the four array elements of Beidou satellite navigation model as the research object, put forward a kind of Compass satellite navigation signal model construction method, and using Matlab software to build the satellite navigation signal system model . Based on the power inversion principle, try to use the recursive least squares (RLS) algorithm for getting the power inversion Optimum weights, compared and evaluated in terms of this performance. The results show that the power inversion based on RLS algorithm can make the antenna array in the direction of interference to automatica

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11

Eken, F., and W. Bonser. "Use of antenna nulling with broadcast meteor burst communications." IEEE Transactions on Communications 43, no. 2/3/4 (1995): 706–9. http://dx.doi.org/10.1109/26.380094.

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12

Xu, L., Q. Song, J. Huangfu, C. Li, and L. Ran. "Nulling antenna realised utilising a concept of multiplicative array." Electronics Letters 48, no. 1 (2012): 8. http://dx.doi.org/10.1049/el.2011.3424.

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13

Yang, Shiwen, Yeow Beng Gan, and Anyong Qing. "Antenna-array pattern nulling using a differential evolution algorithm." International Journal of RF and Microwave Computer-Aided Engineering 14, no. 1 (2003): 57–63. http://dx.doi.org/10.1002/mmce.10118.

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14

Haupt, R. L. "Adaptive nulling with a reflector antenna using movable scattering elements." IEEE Transactions on Antennas and Propagation 53, no. 2 (2005): 887–90. http://dx.doi.org/10.1109/tap.2004.841271.

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15

Chang, D. C., K. T. Ho, and C. I. Hung. "Partial adaptive nulling on a monopulse phased array antenna system." IEEE Transactions on Antennas and Propagation 40, no. 2 (1992): 121–25. http://dx.doi.org/10.1109/8.127394.

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16

Cui, Ying, Yueping Wu, Dongdong Jiang, and Bruno Clerckx. "User-Centric Interference Nulling in Downlink Multi-Antenna Heterogeneous Networks." IEEE Transactions on Wireless Communications 15, no. 11 (2016): 7484–500. http://dx.doi.org/10.1109/twc.2016.2603475.

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17

Jung, Jin-Woo, and Sang-Keun Lee. "A Study on Pattern Nulling for Phased Array Antenna System." Journal of Korean Institute of Information Technology 18, no. 1 (2020): 67–75. http://dx.doi.org/10.14801/jkiit.2020.18.1.67.

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18

Monk, A. D., and P. J. B. Clarricoats. "Experimental demonstration of adaptive nulling using a mesh reflector antenna." Electronics Letters 30, no. 16 (1994): 1259–61. http://dx.doi.org/10.1049/el:19940874.

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19

Tong, Luyen, and Van Anh Nguyen. "Adaptive beamforming for uniform circular arrays." Journal of Measurement, Control, and Automation 29, no. 2 (2025): 51–55. https://doi.org/10.64032/mca.v29i2.259.

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Анотація:

Beamforming in smart antennas is a highly effective technique that utilizes the flexible adjustment of antenna radiation characteristics, including main beam direction, interference nulling, and sidelobe level control. This paper proposes an adaptive beamforming solution based on the hybrid optimization algorithm combining Particle Swarm Optimization Grey Wolf Optimizer (HPSOGWO) and Bat Algorithm (BA) for Uniform Circular Arrays (UCA). The proposed approach demonstrates the ability to place nulls at interference directions and steer the main beam toward the desired direction. The modeling of

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20

Guney, Kerim, and Ali Durmus. "Pattern Nulling of Linear Antenna Arrays Using Backtracking Search Optimization Algorithm." International Journal of Antennas and Propagation 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/713080.

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Анотація:

An evolutionary method based on backtracking search optimization algorithm (BSA) is proposed for linear antenna array pattern synthesis with prescribed nulls at interference directions. Pattern nulling is obtained by controlling only the amplitude, position, and phase of the antenna array elements. BSA is an innovative metaheuristic technique based on an iterative process. Various numerical examples of linear array patterns with the prescribed single, multiple, and wide nulls are given to illustrate the performance and flexibility of BSA. The results obtained by BSA are compared with the resul

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21

Lee, Yong-Jun, Jong-Woo Seo, and Dong-Chul Park. "Study on Nulling Antenna Using Genetic Algorithm with Opposite-Sign Phase." Journal of Korean Institute of Electromagnetic Engineering and Science 21, no. 6 (2010): 690–97. http://dx.doi.org/10.5515/kjkiees.2010.21.6.690.

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22

McMichael, Ian T., Erik T. Lundberg, Drayton L. Hanna, and Frank S. Kolak. "A HORIZON RING NULLING SHORTED ANNULAR PATCH ANTENNA WITH SHUNTED STUBS." Progress In Electromagnetics Research M 62 (2017): 131–41. http://dx.doi.org/10.2528/pierm17082504.

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23

Amin, M. G. "Concurrent nulling and locations of multiple interferences in adaptive antenna arrays." IEEE Transactions on Signal Processing 40, no. 11 (1992): 2658–68. http://dx.doi.org/10.1109/78.165653.

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24

Ghayoula, R., N. Fadlallah, A. Gharsallah, and M. Rammal. "Phase-only adaptive nulling with neural networks for antenna array synthesis." IET Microwaves, Antennas & Propagation 3, no. 1 (2009): 154. http://dx.doi.org/10.1049/iet-map:20070256.

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25

Eken, F. "Use of antenna nulling with frequency-hopping against the follower jammer." IEEE Transactions on Antennas and Propagation 39, no. 9 (1991): 1391–97. http://dx.doi.org/10.1109/8.99049.

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26

R. "PHASE-ONLY ADAPTIVE NULLING WITH TAGUCHIâS METHOD FOR ANTENNA ARRAY SYNTHESIS." American Journal of Applied Sciences 9, no. 11 (2012): 1833–39. http://dx.doi.org/10.3844/ajassp.2012.1833.1839.

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27

Han, Chuang, Haoyang Lei, Yanyun Gong, and Ling Wang. "Sparse Covariance Matrix Reconstruction-Based Nulling Broadening for UAV 2D Antenna Arrays." Wireless Communications and Mobile Computing 2022 (May 10, 2022): 1–19. http://dx.doi.org/10.1155/2022/4987990.

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Since the antennas on UAVs may have slight vibrations or the interference source is in the state of rapid movement in practice, the interference suppression performance and robustness of the traditional methods may suffer a decline. In this paper, we propose a flexible asymmetric null widening technique, which allows flexible adjustment of the null width to accommodate the variation of the interference source. This method has a good effect of spreading zero trap on the two-dimensional array and can effectively reduce the waste of degrees of freedom. Firstly, the flexible asymmetric null wideni

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28

Kartsan, I. N., V. N. Tyapkin, D. D. Dmitriev, A. E. Goncharov, P. V. Zelenkov, and I. V. Kovalev. "Specialized software for the adaptive nulling unit of a hybrid reflector antenna." IOP Conference Series: Materials Science and Engineering 155 (November 2016): 012018. http://dx.doi.org/10.1088/1757-899x/155/1/012018.

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29

Juswardy, Budi, Feng Xiao, and Kamal Alameh. "Photonic true-time delay unit for broadband adaptive nulling in antenna arrays." Optical and Quantum Electronics 41, no. 11-13 (2009): 819–26. http://dx.doi.org/10.1007/s11082-010-9396-9.

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30

Albagory, Yasser, and Fahad Alraddady. "An Efficient Adaptive and Steep-Convergent Sidelobes Simultaneous Reduction Algorithm for Massive Linear Arrays." Electronics 11, no. 2 (2022): 170. http://dx.doi.org/10.3390/electronics11020170.

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Анотація:

Antenna arrays have become an essential part of most wireless communications systems. In this paper, the unwanted sidelobes in the symmetric linear array power pattern are reduced efficiently by utilizing a faster simultaneous sidelobes processing algorithm, which generates nulling sub-beams that are adapted to control and maintain steep convergence toward lower sidelobe levels. The proposed algorithm is performed using adaptive damping and heuristic factors which result in learning curve perturbations during the first few loops of the reduction process and is followed by a very steep converge

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31

Ullah, Irfan, Benjamin D. Braaten, Adnan Iftikhar, Symeon Nikolaou, and Dimitris E. Anagnostou. "Beamforming with 1 × N Conformal Arrays." Sensors 22, no. 17 (2022): 6616. http://dx.doi.org/10.3390/s22176616.

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The rapid growth of wireless spectrum access through cellular and IoT devices, for example, requires antennas with more capabilities such as being conformal and self-adapting beamforming. In this paper, the adaptive beamforming patterns of microstrip patch antenna arrays on changing flexible (or conformal) curved surfaces are developed by deriving array coefficients based on the projection method that includes the mutual coupling between elements. A linear four-element microstrip patch antenna array is then embedded on two deformed conformal surfaces to investigate the projection method for de

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32

Ahmed, Sadiq. "Synthesis of Linear Antenna Arrays using the Differential Evolution Algorithm with Current-Only Adaptive Nulling Technique." Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), no. 1 (October 14, 2021): 205–22. http://dx.doi.org/10.55562/jrucs.v35i1.270.

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This paper presents an efficient method for the pattern synthesis of linear antenna array based on the differential evolution algorithm. A number of examples are presented to demonstrate the various capabilities of the this method for different number of elements. The main objective of this paper is to achieve a set of current weights in order to steer the nulls in undesired directions (nulling the undesired signals) and steering the main beam towards the desired direction(direction of desired signal) by changing the phase excitation currents. The fitness function is obtained from maximization

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33

Peng, Guoliang, Lihui Jiang, Xiaohui Tao, Yan Zhang, and Rui Cao. "A Real-Time Adaptive Station Beamforming Strategy for Next Generation Phased Array Radio Telescopes." Sensors 24, no. 14 (2024): 4723. http://dx.doi.org/10.3390/s24144723.

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The next generation phased array radio telescopes, such as the Square Kilometre Array (SKA) low frequency aperture array, suffer from RF interference (RFI) because of the large field of view of antenna element. The classical station beamformer used in SKA-low is resource efficient but cannot deal with the unknown sidelobe RFI. A real-time adaptive beamforming strategy is proposed for SKA-low station, which trades the capability of adaptive RFI nulling at an acceptably cost, it doesn’t require hardware redesign but only modifies the firmware accordingly. The proposed strategy uses a Parallel Le

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34

Caizzone, Stefano, Georg Buchner, Mihaela-Simona Circiu, Manuel Cuntz, Wahid Elmarissi, and Emilio Pérez Marcos. "A Miniaturized Multiband Antenna Array for Robust Navigation in Aerial Applications." Sensors 19, no. 10 (2019): 2258. http://dx.doi.org/10.3390/s19102258.

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Satellite navigation is more and more important in a plethora of very different application fields, ranging from bank transactions to shipping, from autonomous driving to aerial applications, such as avionics as well as unmanned aerial vehicles (UAVs). Due to the increasing dependency on satellite navigation, the need for robust systems able to counteract unintentional or intentional interferences is growing. When considering interference-robust designs; however, the complexity increases. Top performance is obtained through the use of multi-antenna receivers capable of performing spatial nulli

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35

Salem, Balaem, S. K. Tiong, S. P. Koh, and Soodabeh Darzi. "Avoiding Self Nulling by Using Linear Constraint Minimum Variance Beamforming in Smart Antenna." Research Journal of Applied Sciences, Engineering and Technology 5, no. 12 (2013): 3435–43. http://dx.doi.org/10.19026/rjaset.5.4590.

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36

Gray, S. D. "A Nulling Performance Comparison Between a Single- and Multiple-Aperture Multiple-Beam Antenna." IEEE Transactions on Antennas and Propagation 43, no. 11 (1995): 1319. http://dx.doi.org/10.1109/tap.1995.481184.

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37

Chen, Yikai, Shiwen Yang, Gang Li, and Zaiping Nie. "Adaptive Nulling with Time-Modulated Antenna Arrays Using a Hybrid Differential Evolution Strategy." Electromagnetics 30, no. 7 (2010): 574–88. http://dx.doi.org/10.1080/02726343.2010.513931.

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38

Kartsan, I. N., V. N. Tyapkin, D. D. Dmitriev, A. E. Goncharov, P. V. Zelenkov, and I. V. Kovalev. "Simulation modeling of functional adaptive interference nulling for multibeam hybrid reflector antenna systems." IOP Conference Series: Materials Science and Engineering 155 (November 2016): 012017. http://dx.doi.org/10.1088/1757-899x/155/1/012017.

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39

Xiao, Xiao, and Yilong Lu. "Data-Based Model for Wide Nulling Problem in Adaptive Digital Beamforming Antenna Array." IEEE Antennas and Wireless Propagation Letters 18, no. 11 (2019): 2249–53. http://dx.doi.org/10.1109/lawp.2019.2925419.

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40

Gray, S. D. "A nulling performance comparison between a single- and multiple-aperture multiple-beam antenna." IEEE Transactions on Antennas and Propagation 43, no. 11 (1995): 1319–24. http://dx.doi.org/10.1109/8.475106.

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41

Hamza, Abubakar, Hussein Attia, Muhammad S. Iqbal, and Essam E. Hassan. "Optimization and Simulation-Time Reduction of Adaptive Antenna Array Employing Schelkunoff Nulling Theory." IEEE Transactions on Antennas and Propagation 68, no. 4 (2020): 3295–300. http://dx.doi.org/10.1109/tap.2019.2944550.

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42

Wang, Guanjun, Xusheng Tang, Fengyi Huang, Yulong Xia, and Qianyi Ren. "GNSS repeater-based spoofing heterogeneous antenna array with the analog nulling beamforming effect." AEU - International Journal of Electronics and Communications 200 (October 2025): 155937. https://doi.org/10.1016/j.aeue.2025.155937.

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43

Yu, YongLin, Shuo Xu, Lei Zhang, et al. "A Two-element Interferometer for Millimeter-wave Solar Flare Observations." Astrophysical Journal Supplement Series 267, no. 1 (2023): 14. http://dx.doi.org/10.3847/1538-4365/acd9af.

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Анотація:

Abstract In this paper, we present the design and implementation of a two-element interferometer operating in the millimeter-wave band (39.5–40 GHz) for observing solar radio emissions through nulling interference. The system is composed of two 50 cm aperture Cassegrain antennas installed on a common equatorial mount, with a separation of 230 wavelengths. The cross-correlation of the received signals effectively cancels out the quiet solar component of the high flux density (∼3000 sfu) that reduces the detection limit due to atmospheric fluctuations. The system performance is as follows: the n

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44

Kiong, Tiong Sieh, S. Balasem Salem, Johnny Koh Siaw Paw, K. Prajindra Sankar, and Soodabeh Darzi. "Minimum Variance Distortionless Response Beamformer with Enhanced Nulling Level Control via Dynamic Mutated Artificial Immune System." Scientific World Journal 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/164053.

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Анотація:

In smart antenna applications, the adaptive beamforming technique is used to cancel interfering signals (placing nulls) and produce or steer a strong beam toward the target signal according to the calculated weight vectors. Minimum variance distortionless response (MVDR) beamforming is capable of determining the weight vectors for beam steering; however, its nulling level on the interference sources remains unsatisfactory. Beamforming can be considered as an optimization problem, such that optimal weight vector should be obtained through computation. Hence, in this paper, a new dynamic mutated

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45

Irteza, S., E. Schäfer, R. Stephan, A. Hornbostel, and M. A. Hein. "Compact antenna array receiver for robust satellite navigation systems." International Journal of Microwave and Wireless Technologies 7, no. 6 (2014): 735–45. http://dx.doi.org/10.1017/s1759078714000907.

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A compact navigation receiver comprising a decoupled and matched four-element L1-band antenna array with an inter-element separation of a quarter of the free-space wavelength is presented in this paper. We investigate the impact of the decoupling and matching network on the robustness of the navigation receiver. It is observed that in order to achieve high robustness with a compact antenna array, it is necessary to employ a decoupling and matching network, particularly in case of three spatially separated interferers. Furthermore, we study the influence of the polarization impurity of the comp

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46

Guney, K., A. Durmus, and S. Basbug. "Backtracking Search Optimization Algorithm for Synthesis of Concentric Circular Antenna Arrays." International Journal of Antennas and Propagation 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/250841.

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Анотація:

A backtracking search optimization algorithm (BSA) is proposed for the synthesis of concentric circular antenna arrays (CCAAs) with the low sidelobe levels at a fixed beamwidth. Several numerical examples of CCAA patterns with the single, multiple, and broad nulls imposed at the directions of interference are also given to illustrate the performance and flexibility of the proposed algorithm. BSA is a relatively new population based evolutionary optimization algorithm. The numerical results show that the design of CCAA using BSA provides good sidelobe levels with a fixed beamwidth. The nulling

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47

Guney, Kerim, and Murat Onay. "AMPLITUDE-ONLY PATTERN NULLING OF LINEAR ANTENNA ARRAYS WITH THE USE OF BEES ALGORITHM." Progress In Electromagnetics Research 70 (2007): 21–36. http://dx.doi.org/10.2528/pier07011204.

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Iqbal, Zabed, Tanzeela Mitha, and Maria Pour. "A Self-Nulling Single-Layer Dual-Mode Microstrip Patch Antenna for Grating Lobe Reduction." IEEE Antennas and Wireless Propagation Letters 19, no. 9 (2020): 1506–10. http://dx.doi.org/10.1109/lawp.2020.3007903.

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Lim, Tae Heung, Byung-Jun Jang, and Hosung Choo. "Design of Heterogenous Two-Element Array Antenna on an Electrically Thick Substrate for High Isolation and Low Pattern Correlation Using Modal Difference in Radiation Patterns." Applied Sciences 10, no. 11 (2020): 3916. http://dx.doi.org/10.3390/app10113916.

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Анотація:

In this paper, we propose a novel design of a two-element array antenna on an electrical thick substrate with an extremely narrow array distance. The proposed array consists of a rectangular ring patch printed on a thick substrate and a monopole wire in the center of the substrate. Each element has a modal difference in the radiation pattern, causing high isolation and low correlation between the array elements. From the measurement results, the monopole and patch elements exhibit reflection coefficients of −10 dB and −10.7 dB with peak gains of 3.8 dBi and 6.1 dBi, respectively, at 1.6 GHz. T

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Liu, Rui, Zhiwei Yang, Qidong Chen, Guisheng Liao, and Qinglin Zhu. "Localization of GNSS Spoofing Interference Source Based on a Moving Array Antenna." Remote Sensing 15, no. 23 (2023): 5497. http://dx.doi.org/10.3390/rs15235497.

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Анотація:

GNSS spoofing interference utilizes falsified navigation signals to launch attacks on GNSS systems, posing a significant threat to applications that rely on GNSS signals for positioning, navigation, and time services. Therefore, achieving effective localization of the sources causing spoofing interference is crucial in ensuring the secure operation of GNSS. This article proposes a method for locating GNSS spoofing interference sources using a moving array antenna. Firstly, the proposed method utilizes the inherent characteristics of the double-differenced carrier phase from the deception signa

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