Synthesis of monopulse antenna patterns for elliptical phased array antennas with different peak sidelobes along the principal planes

This paper deals with the synthesis of monopulse antenna patterns, sum and difference ones, for planar phased array antennas with an elliptical aperture boundary featuring unequal ultra-low peak sidelobe levels (PSLLs) for the two principal planes of its far field. The used synthesis method is the iterative Fourier transform (IFT) approach. The...

Planar Phased-Array Antennas Mutual Coupling and Ultralow Peak Sidelobes

This article will deal with the impact of mutual coupling on the far-field peak sidelobe performance of a finite planar phased-array antenna having a circular aperture shape and containing 2,066 elements arranged in a triangular grid. The radiator that is used is of the open-ended rectangular waveguide type, vertically polarized. The computation...

Synthesis of Scan- and Frequency-Invariant Low-Sidelobe Tapers for Planar Array Antennas

The impact of the array factor (AF) on the synthesis of a low-sidelobe taper for planar array antennas with a periodic element grid is investigated. A low-sidelobe taper that is synthesized for those far-field directions of the AF belonging to only visible direction, cosine u - v space, can seriously deteriorate with respect to peak sidelobe...

Linear array thinning using iterative FFT techniques

A new approach for the synthesis of thinned uniformly spaced linear arrays featuring a minimum sidelobe level is presented. The method is based on the iterative Fourier technique to derive element excitations from the prescribed array factor using successive forward and backward Fourier transforms. Array thinning is accomplished by setting the...

Element failure correction for a large monopulse phased array antenna with active amplitude weighting

Recently a new method is introduced to synthesize low sidelobe patterns for planar array antennas with a periodic element arrangement. The method makes use of the property that for a planar array with periodic spacing of the elements, an inverse Fourier transform relationship exists between the array factor and the element excitations. This...

Fast low-sidelobe synthesis for large planar array antennas utilizing successive fast fourier transforms of the array factor

A new and very fast low-sidelobe pattern synthesis method for planar array antennas with periodic element spacing is described. The basic idea of the method is that since the array factor is related to the element excitations through an inverse Fourier transform, the element excitations can be derived from the array factor through a direct...

An overview of RF and Adaptive Algorithm/Digital Beam Forming Hardware and Technology in COST 260

This paper gives an overview of the activities of Working Group 2 in COST Action 260. The COST 260 Action started in 1997 and will continue till the end of the year 2001. The presented information is largely retrieved from papers presented at two COST 260 Workshops organised in Dec.'97 and Nov. '99, and three other COST 260 Working Group...

PHASIM, an advanced phased array antenna software simulator

A sophisticated phased array simulator software package for the design and analysis of planar phased array antennas is presented. This package can accurately simulate the far-field characteristics of a large variety of planar phased array configurations in both the frequency and time domain. The simulator is coded in MATLAB version 5.3. Using...

PHASIM, an advanced phased array antenna software simulator

A sophisticated phased array simulator software package for the design and analysis of planar phased array antennas is presented. This package can accurately simulate the far-field characteristics of a large variety of planar phased array configurations in both the frequency and time domain. The simulator is coded in MATLAB version 5.3. Using...

PHASIM, a sophisticated phased array antenna software simulator implemented in MATLAB 5.2

A sophisticated phased array simulator software package for the design and analysis of planar phased array antennas is presented. This simulator is coded in MATLAB version 5.2. Using MATLAB, numerical engineering problems can be solved in a fraction of time of time required by programs coded in FORTRAN or C. This paper addresses an assessment of...

An overview of Test Techniques for Characterizing Active Phased Array Antennas

In this paper a review will be given of the microwave testing of active phased anay antennas. It will be shown that due to the application of Transmit/Receive (T/R) modules in such antennas considerable more tests have to be performed to characterise completely their microwave performance than for conventional passive antennas. The major...

The Impact of Future Space-Borne SAR System Requirements on Active Phased Array Antenna Technology (abstract)

Abstract only.

Waveguide Phased Array Antenna Analysis and Synthesis

Results of two software packages for analysis and synthesis of waveguide phased array antennas are shown. The antennas consist of arrays of open-ended waveguides where irises can be placed in the waveguide apertures and multiple dielectric sheets in front of the apertures in order to accomplish a wide band wide scan angle impedance match. One of...

Dual Polarized Waveguide Phased Array for SAR Application

A modal technique is employed to evaluate the suitability of a square waveguide element for use in a dual polarized phased array. The element is found to possess low active reflection coefficient and high cross-polar isolation over the bandwith and scan volume that are typically required for SAR applications.