Here we address some of the issues faced by antenna engineers when testing active antennas. We review some features of phased arrays and report on how MI Technologies has dealt with the issue of measuring the effective isotropic radiated power (EIRP) and antenna patterns by use of the spherical near-field scanning technique. We take as an example the test methodology of the SAMPSON radar antenna.

This article presents the design, fabrication, and testing of a modulated metasurface (MTS) antenna for monopulse radar tracking at Ka-band. The consists circular, thin grounded dielectric layer printed by texture metallic patches in shape size. patch can be modeled as spatially variable capacitive impedance sheet, which together with slab contribution provides an overall, modulated, inductive ...

The problem of recognition of extended targets such as convoys of ground vehicles by radar is discussed. The paper focuses on target recognition during the search and track radar mode, i.e., using a real aperture mode. Radar with multi-channel array antenna is assumed. Such radar produces multi-channel echo data and offers the potential of space and space-time signal processing. Generalised spa...

The design of a new L-band antenna for DLR’s airborne synthetic aperture radar system (E-/F-SAR) is presented. Beside operations in L-band new components for a system upgrade were developed. These components are introduced. Special interest of this paper is the development of the dual-polarized L-Band antenna with enhanced bandwidth of 150MHz. The antenna feed network is equipped with 2bit hybr...

Radar clutter is very complicated signal, because it is a kind of random process and invisible to human. As a result, besides instrumental parameters, environmental parameters will play a critical role in later data analyses. At present, the research about radar clutter has become a special field, which greatly affects the development and application of radar. This paper presents an innovative ...

The characteristics of a bow-tie slot antenna with tapered tuning stubs fed by a coplanar waveguide (CPW) are investigated. The effects of the antenna dimensional parameters are studied through simulation results and design procedure is developed and verified for different frequency bands. The antenna shows wideband characteristics for radar and wireless communication applications. Numerical si...

In this paper a printed dipole antenna and three slot antennas are designed to operate at 10 GHz for use in radar systems. A parametric study of each antenna and comparison between their radiation properties including return loss, bandwidth, directivity, efficiency and radiation patterns for 6element linear array are introduced. Microstrip slot antennas show wider bandwidth, less coupling and s...

A compact U shaped slot patch antenna is proposed and designed in this paper for Wi-max and radar applications. This antenna is designed on a Rogers RT-Duroid substrate of dielectric constant 2.2 with thickness of 0.16cm. The dimensions of the proposed antenna are 3cm X 3cm X 0.16cm. The proposed antenna resonates at three frequencies 6.05 GHz, 9.87 GHz and 10.47 GHz. The gain of the proposed m...

Synthetic Aperture Radar Imaging Simulated in MATLAB Matthew Schlutz This thesis further develops a method from ongoing thesis projects with the goal of generating images using synthetic aperture radar (SAR) simulations coded in MATLAB. The project is supervised by Dr. John Saghri and sponsored by Raytheon Space and Airborne Systems. SAR is a type of imaging radar in which the relative movement...

This paper presents the use of PN junction diode on fractal monopole antenna with microstrip line for rreconfigurable multiband antennas. The developed multiband antennas focus on the applications for Wi-Fi, cordless telephone and satellite & radar. A fractal reconfigurable antenna was designed using the known fractal geometry such as Sierpinski gasket is fed by strip line using coaxial feed. A...