Results 271 to 280 of about 47,507 (304)

Single-Antenna Direction Finding With Harmonic Analysis Based on Phasor Beam-Steering Antenna

IEEE Antennas and Wireless Propagation Letters
A novel single-antenna azimuthal direction-finding (DF) method with harmonic analysis is proposed in this letter. Leveraging the phasor beam-steering antenna’s capability of reconfiguring both the amplitude and phase patterns, a one-to-one relationship ...
Siyu Zhou, Shuangshuang Zhu, Ziheng Ding, Jun-ping Geng, Jingfeng Chen, Ronghong Jin   +5 more
semanticscholar   +1 more source

Amplitude and Phase Imbalance Calibration for Space-Based Precision Direction Finding System

Linköping Electronic Conference Proceedings
Modern space systems rely heavily on the Radio Frequency Direction Finder (RF DF) for various applications, where multichannel receivers are used to determine signal arrival angles.
José Augusto De Souza Melo, Lucas Compassi Severo, Olympio Lucchini Coutinho   +2 more
semanticscholar   +1 more source

A Wideband Balanced Antipodal Vivaldi Antenna for Direction Finding Application

2025 IEEE Microwaves, Antennas, and Propagation Conference (MAPCON)
In this paper, a wideband Balanced Antipodal Vivaldi Antenna (BAVA) operating in 2-18 GHz frequency band within the size constraint of $80 \times 120 ~\text{mm}$ for DF application is presented by incorporating innovative concept of adding serration to ...
C. Madhavi, R. Umadevi, B. Ramakrishna, C. Sairam, H. Sudhir, M. Chakravathy   +5 more
semanticscholar   +1 more source

DeepTDOA: Direction Finding using Deep Learning on Distributed TDOA-based Systems in the Presence of Time Offset

Signal Processing and Communications Applications Conference
With the advancing sensor (receiver-processor) technology, Time Difference of Arrival (TDOA) based systems have become attractive for estimating the direction of a transient or pulsed signal.
Mehmet Altan Toksöz, Mustafa Küçük, Mustafa Atahan Nuhoglu, B. Yildirim   +3 more
semanticscholar   +1 more source

Biologically Inspired DOA Estimation Method for Small-Aperture Direction Finding HF Radar

IEEE Geoscience and Remote Sensing Letters
A high-frequency (HF) surface-wave radar has been widely used in marine monitoring and vessel surveillance, among which compact ones, e.g., a crossed-loop/monopole antenna (CMA), are preferred in many scenarios for their low costs and easy maintenance ...
Jiaxue Zhang, Qinghao Zhu, Da Huang, Hao Zhou, Yingwei Tian   +4 more
semanticscholar   +1 more source

Direction Finding for Shipborne HFSWR based on Integral Reconstruction and Virtual Array Transformation

Oceans
Shipborne high-frequency surface wave radar (HFSWR) has been widely studied due to its good maneuverability and great advantages in maritime detection and monitoring.
Cheng Wang, Ling Zhang, Xiaozhong Zhang, J. Niu, Zhaokai Liu, Zongtai Li, Jiangnan Zhong   +6 more
semanticscholar   +1 more source

Analysis of the Influence of Forwarding Waveform with Time-domain Mismatch on Time Difference Direction Finding

Progress in Electromagnetics Research Symposium
Compared with other passive direction finding (DF) methods, such as amplitude and phase comparison DF, time difference DF has the advantages of high measurement accuracy, fast processing speed, and simple hardware structure, and has a wide range of ...
Qi Zhao, Zhonghao Lu, Shunping Xiao
semanticscholar   +1 more source

An Ultra-wideband Circular Array Interferometer and Direction Finding Algorithm

Progress in Electromagnetics Research Symposium
To solve the contradiction between the direction of arrival (DOA) estimation accuracy in the lower frequency band and phase ambiguity in the higher frequency band for an ultra-wideband direction finding (DF) system, this paper presents an omnidirectional
Qiancheng Ying, Le Zuo
semanticscholar   +1 more source

Coupled Feed Mechanically Rotating Antenna for Unmanned Aerial Vehicle Direction-Finding

IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications
This paper proposes a coupled feed mechanically rotating antenna for unmanned aerial vehicle (UAV) direction-finding (DF). The propeller blades themselves are designed as a half-wave dipole., with a cross-shaped feed component mounted on the blade safety
Wentao Li, Ruyu Ma, Junhui Ou, X. Zhang
semanticscholar   +1 more source

Research on Interference Methods for Interferometer Direction-finding Based on Dual-point Source Co-processing

IEEE International Conference on Electronic Information and Communication Technology
Most interferometer direction-finding (DF) interference techniques are limited by the difficulty of achieving coherent interference, failing to interfere with DF effectively.
Qi Zhao, Zhonghao Lu, Shunping Xiao
semanticscholar   +1 more source