Patch antennas have emerged rapidly with advancement of communication technology. For antenna design purposes, Finite difference time domain (FDTD) method is a commonly used. This paper focuses on the interaction among elements of MIMO antenna also known as mutual coupling using FDTD method. An M shape is introduced and with placement of isolating structure, round about 12dB of isolation is inc...

Multiple-input multiple-output (MIMO) radar is a relatively new concept in the field of radar signal processing. Many novel MIMO radar waveforms have been developed by considering various performance metrics and constraints. In this paper, we show that finite alphabet constant-envelope (FACE) quadrature-pulse shift keying (QPSK) waveforms can be designed to realize a given covariance matrix by ...

The detection of low, slow and small (LSS) targets, such as drones, is a developing area research in radar, wherein the presence ground clutter can be quite challenging. LSS because their unusual flying mode, easily shadowed by clutter, leading to poor radar performance. In this study, we investigated feasibility performance mitigation method combining slow-time multiple-input multiple-output (...

Recently many studies have been done on different issues of using multiple antennas at transmit and receive sides of a radar system in a MIMO (Multiple Input Multiple Output) configuration. In addition, for the purpose of electronic warfare, the utilization of available signals of the environment to detect the targets has gained considerable attention in recent years. Such passive radars use th...

Abstract Frequency diverse array (FDA), which can be combined with Multiple-input-Multiple-output (MIMO) to improve the performance of system, and range information provided by FDA-MIMO radar provides a new idea for suppressing main lobe interference. However, periodicity angle-range two-dimensional beam pattern also causes some safety hazards beamforming process. When interference is located i...

In this paper, an equivalent ‘virtual’ SIMO (Single Input Multiple Output) radar representation of the MIMO radar system is established which enables the analysis of the full MIMO system geometry. Analytical expressions are derived to describe the key geometrical properties of the virtual array’s manifold, which fully characterises the entire transmit-receive system geometry. A new family of su...

Since the Federal Communication Commission (FCC) issued a license for 3.1 – 10.6 GHz frequency spectrum unlicensed radio applications, many papers have been published regarding ultrawideband (UWB) antenna design. The issue of UWB design is determining how to create an with wide bandwidth, capable rejecting communication systems that coexist bands, and designing antennas multiple input output (M...

Frequency diverse array (FDA) uses a small frequency increment at each antenna element to get a range, angle and time dependent beam pattern. Although linear frequency offset is used in most radar systems, nonlinear frequency offset is also very useful for analyzing FDA radar. A logarithmic frequency offsets based FDA (log-FDA) removes the inherent periodicity of FDA beam pattern to get a singl...

In this article, we consider the joint estimation of direction-of-departure (DOD) and direction-ofarrival (DOA) information of maneuvering targets in a bistatic multiple-input multiple-output (MIMO) radar system that exploits spatial time-frequency distribution (STFD). STFD has been found useful in solving various array processing problems, such as direction finding and blind source separation,...