Field profiles, equivalent isotropic radiated power (EIRP), beamwidth, and sidelobe levels of a quasi-optical powercombining grid amplifier structure are obtained using a wholefield electromagnetic analysis of a finite structure. This is efficiently obtained using a mixed spectraland spatial-domain method-of-moments technique. It is seen that edge effects can have a significant effect on system...

We calculate the linear complexity of almost perfect binary sequences. Also we study the linear complexity of binary sequences obtained from series of almost perfect ternary sequences and the ternary sequences with two nonzero autocorrelation sidelobe levels. Key–Words: linear complexity, almost perfect sequences

Very efficient sidelobe suppression of Barker codes of length 13 is achieved through the use of a novel mismatched filter. The mismatched filter is comprised of a conventional matched filter cascaded with a computationally efficient filter based on multiplicative expansion. Several constant parameters are introduced in the terms of the expansion and they are optimized to improve the performance...

Optical Coherence Tomography (OCT) is a relatively new type of imaging system for medical diagnosis. Because most current OCT systems use a sharply focused beam in tissues, they have a short depth of field (high image resolution is near the focus only). In this paper, limited diffraction beams of different orders are used to increase depth of field and to reduce sidelobes in OCT. Results show t...

Continuing improvements in analog and digital technology has made elemental digital beamforming (DBF) for sensor arrays a reality. Weak signal reception enhancement can be achieved through the adaptive suppression of potentially time-varying interference in operational environments. Utilizing all the degrees of freedom (DoF's) of an adaptive elemental DBF array with a large number of elements i...

In many cases, one needs to estimate a target that is obscured by the sidelobes of a very large, adjacent scatterer. For example, the Earth's surface can ruin nearsurface rain-rate measurements obtained from an airborne platform, or it can prevent a ground-penetrating radar from detecting land mines located at shallow depth. In these cases, the range sidelobes of the ground are larger than the ...