A new promising architecture of microwave personnel screening system is analyzed in this paper with numerical simulations. This architecture is based on the concept of inverse aperture synthesis applied to a naturally moving person. The extent of the synthetic aperture is formed by a stationary vertical linear antenna array and by a length of subject’s trajectory as he moves in the vicinity of ...

This paper presents a novel narrowband microstrip patch antenna for radar application. The proposed antenna consists of rectangular radiating patch which provides a narrowband behavior and relatively good impedance matching working in the band of 3-12 GHz. A parametric study is performed on three different antenna structures. The measured results give three narrow band stable signal transmissio...

In this study, the modified Cramér-Rao lower bounds (MCRLBs) on the joint estimation of target position and velocity is investigated for a universal mobile telecommunication system (UMTS)-based passive multistatic radar system with antenna arrays. First, we analyze the log-likelihood redfunction of the received signal for a complex Gaussian extended target. Then, due to the non-deterministic tr...

Methods for reducing Radar Cross Section (RCS) of objects have been investigated by many researchers both experimentally and theoretically for the last so many years. This chapter presents a chronological review of important research in the fields of RCS studies, RCS reduction techniques and fractal based scattering and radiating structures. This chapter is divided into two sections. The first ...

Beam forming is a signal processing technique used in antenna arrays for directional signal transmission or reception. Phased array radar is very important in modern radar development, and multiple digital beams forming technology is the most significant technology in phased array radar. Digital multiple beam forming on each antenna element about large phased array radar is impossible in proces...

Office of Naval Research (ONR) of U.S.A navy has been carrying out research about advanced multifunction radio frequency concept (AMRFC) to apply the Multifunction Electronic Warfare & Electronic Support (MFEW ES) system to the future navy battleship [1]. In order to that conventional radar and communication antennas need to be active phased array antennas that can provide multi-functions such ...

Radars equipped with an Electronically Scanned Antenna (ESA) have the potential of directing the electromagnetic radar beam without mechanically adjusting the antenna. Furthermore, the beam can be redirected instantaneously towards any location in space. Hence, the mechanical constraint of a traditional antenna, which imposes the typically revolving measurement pattern, is relaxed. This means, ...

Developing a cost-effective security system has been an important issue in crime prevention. Although cameras have been known as an effective candidate for this purpose, they have some downside, such as difficulty in accurately estimating the three-dimensional shape of a target, and the exact distance to a target [1], [2]. Ultra-wideband (UWB) pulse radar is an alternative for resolving these p...

The strongest interfering signals received in the passband of the Green Bank Telescope’s (GBT) 1.15-1.7 GHz receiver are radar pulses at 1256 and 1292 MHz. These pulses are transmitted by an ARSR-3 FAA Air Surveillance Radar on Apple Orchard Mountain near Bedford, VA, longitude 79.510W, latitude 37.517N, elevation 1288 meters (4225 feet). This radar antenna is about 106 km south-southeast of th...

In spaceborne dual-antenna (i.e., single-pass mode) interferometric synthetic aperture radar (InSAR) system, the alignment of the master and slave antenna beam is crucial. In order to achieve the best interferometric performance, antenna beams should be coincided with each other between the master and slave. The beam alignment of the first spaceborne dual-antenna InSAR system, the Shuttle Radar...