Results 51 to 60 of about 927 (180)

Dynamic mainlobe interference suppression method based on monopulse with gray model Kalman filter

The Journal of Engineering, 2019
The architecture and processing algorithm of mainlobe interference suppression method is described for nulling the signal from mainlobe electronic jammer and multiple sidelobe electronic jammers while maintaining monopulse angle estimation accuracy on ...
Li Feng, Zhang Zhe, Yao Di
doaj   +1 more source

Lithosphere‐Asthenosphere Interactions Across the Indo‐Burma Subduction Zone From Sp Receiver Functions

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract The Cenozoic convergence between the Indian and Asian plates has driven large‐scale mantle convection that interacts with both plates. Understanding this convergence benefits from clear imaging of the lithosphere‐asthenosphere boundary (LAB).
Yiming Bai, Xiaohui Yuan, Frederik Tilmann, Bernd Schurr, Yinshuang Ai, Yumei He, Shengji Wei, Guangbing Hou, Myo Thant, Kyaing Sein, Oo Than, Mingming Jiang, Ping Tong   +12 more
wiley   +1 more source

A Biphase Code Sidelobe Suppression Method Based on the CLEAN Algorithm

IEEE Access
In the processing of biphase-coded signals, if the moment of ADC sampling coincides with the transition edge of the code inversion, it can result in the loss of peak information.
Yiding Liang, Liyu Tian
doaj   +1 more source

Sidelobe suppression for phase-coded pulse by mainlobe windowing

The Journal of Engineering, 2019
Mismatched filter is an important technique to suppress the sidelobes of phase-coded pulses. Here, the authors propose a mainlobe windowing procedure, by which a much lower sidelobe level can be obtained at a slightly signal-to-noise ratio loss. Based on
Jiacen Xu, Lixiang Ren, Haofei Wang
doaj   +1 more source

Review of millimeter‐wave and terahertz near‐field synthetic aperture radar imaging technology

InfoScience, Volume 3, Issue 2, June 2026.
Abstract This paper comprehensively reviews the development of millimeter‐wave (MMW) and terahertz (THz) near‐field imaging technologies, with an emphasis on the state of synthetic aperture radar (SAR)‐based imaging technologies. Near‐field imaging technologies are categorized into passive and active imaging modes, among which active imaging is favored
Qi Yang, Hongqiang Wang, Xu Chen, Xin Peng   +3 more
wiley   +1 more source

Design and Optimization for 77 GHz Series-Fed Patch Array Antenna Based on Genetic Algorithm

Sensors, 2020
This paper proposes a method for designing a 77 GHz series-fed patch array antenna. Based on the traditional genetic algorithm, the study explores different array topologies consisting of the same microstrip patches to optimize the design.
Shuo Yang, Lijun Zhang, Jun Fu, Zhanqi Zheng, Xiaobin Zhang, Anmou Liao   +5 more
doaj   +1 more source

Low Insertion‐Loss High Power X‐Band SPDT Transmit/Receive Switches in 250 nm GaN HEMT

Microwave and Optical Technology Letters, Volume 68, Issue 6, June 2026.
ABSTRACT We present three X‐band transmit/receive (T/R) switches utilizing single‐pole double‐throw (SPDT) structures in 250 nm GaN HEMT technology. The first T/R switch was designed to achieve low insertion loss by constructing the SPDT structure with a series λ/4 transmission line (T‐line) and meticulously selected two HEMT switches in parallel for ...
Tae‐Hoon Kim, Mun‐Kyo Lee, Soonyoung Hong, Jung‐Dong Park   +3 more
wiley   +1 more source

Deep Metric Learning for Fine-Grained Ship Classification in SAR Images with Sidelobe Interference

Remote Sensing
The interference of sidelobe often causes different targets to exhibit similar features, diminishing fine-grained classification accuracy. This effect is particularly pronounced when the available data are limited. To address the aforementioned issues, a
Haibin Zhu, Yaxin Mu, Wupeng Xie, Kang Xing, Bin Tan, Yashi Zhou, Zhongde Yu, Zhiying Cui, Chuang Zhang, Xin Liu, Zhenghuan Xia   +10 more
doaj   +1 more source

Dispersion‐Engineered Broadband Transparent Meta‐Cloak

Nanophotonics, Volume 15, Issue 9, 13 May 2026.
Achieving broadband performance remains a critical challenge in engineering physics. Here, theoretical derivation shows that the core phase compensation conditions for broadband transparent cloaking exhibit dispersive characteristics. A novel broadband transparent cloaking paradigm via dispersion engineering is proposed, and a meta‐cloak that realizes ...
Dan Liu, Xingshuo Cui, Chunsheng Guan, Xiaochun Liu, Wenye Ji, Fei Gao, Tong Cai   +6 more
wiley   +1 more source

A Frequency Self-Attention MIMO Network for SAR Weak Targets Denoising and Sidelobe Suppression

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Synthetic aperture radar (SAR) is affected by speckle noise and sidelobe artifact because its inherent imaging characteristics, which affect the application in the high-level task.
Songhao Peng, Yunkai Deng, Chunle Wang
doaj   +1 more source