Synthesis of difference patterns for 3-D conformal beam-scanning arrays with asymmetric radiation aperture

HS Lin, YJ Cheng, Y Fan - IEEE Transactions on Antennas and …, 2022 - ieeexplore.ieee.org
Due to the asymmetry of the elements' position distribution and polarization direction, it is a
challenge to synthesize difference patterns with large slope and symmetric main-lobe on 3 …

Performance evaluation of the adaptive sidelobe canceller system with various auxiliary configurations

JR Mohammed, KH Sayidmarie - AEU-International Journal of Electronics …, 2017 - Elsevier
In practical radar systems, the conventional adaptive sidelobe canceller (SLC) works very
well as long as the input signal-to-interference-plus-noise (SINR) ratio is low or when the …

Null steering method by controlling two elements

JR Mohammed, KH Sayidmarie - IET Microwaves, Antennas & …, 2014 - Wiley Online Library
Null steering in adaptive arrays is usually achieved by controlling the complex weights of all
or most of the array elements. This study explores an alternative approach, where only the …

Sidelobe cancellation for uniformly excited planar array antennas by controlling the side elements

JR Mohammed, KH Sayidmarie - IEEE Antennas and Wireless …, 2014 - ieeexplore.ieee.org
A sidelobe cancellation over a wide angular range for the uniformly excited planar array is
proposed. The approach is to readjust the amplitude and phase excitations of the boundary …

Synthesizing sum and difference patterns with low complexity feeding network by sharing element excitations

JR Mohammed - International Journal of Antennas and …, 2017 - Wiley Online Library
In monopulse radar antennas, the synthesizing process of the sum and difference patterns
must be fast enough to achieve good tracking of the targets. At the same time, the feed …

Optimal synthesis of sum and difference beam patterns with a common weight vector for symmetric and asymmetric antenna arrays

X Fan, J Liang, X Zhao, Y Zhang… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
To alleviate the complexity of feeding network design and reduce the dependence of sum
and difference beam pattern synthesis on the central symmetric antenna arrays, a method …

Compact Substrate Integrated Waveguide (SIW) Monopulse Network for -Band Tracking System Applications

H Chen, W Che, Q He, W Feng… - IEEE Transactions on …, 2014 - ieeexplore.ieee.org
A compact single-layer substrate integrated waveguide (SIW) monopulse network for Ku-
band tracking system applications is investigated and demonstrated in this work. The …

Performance of a wide angle and wide band nulling method for phased arrays

KH Sayidmarie, JR Mohammed - Progress In Electromagnetics Research M, 2013 - jpier.org
In most practical applications of the phased array antennas, the generated nulls toward the
interfering signals should have enough depth and width to accommodate fluctuations in …

Design of printed Yagi antenna with additional driven element for WLAN applications

JR Mohammed - Progress In Electromagnetics Research C, 2013 - jpier.org
A new configuration of Yagi antenna is proposed, which can improve the forward/backward
ratio (f/b) significantly while maintaining a high gain. This configuration involves the addition …

Phased array antenna with ultra‐low sidelobes

JR Mohammed - Electronics Letters, 2013 - Wiley Online Library
An innovative technique for obtaining ultra‐low sidelobes pattern in a phased array is
proposed. This technique involves the addition of two external edge elements which …