Low-sidelobe array antenna simulation for time-limited signals

James Doss Halsey; Eugene J. Sigal

doi:10.1117/12.145523

28 May 1993 Low-sidelobe array antenna simulation for time-limited signals

James Doss Halsey, Eugene J. Sigal

Proceedings Volume 1875, Ultrahigh Resolution Radar; (1993) https://doi.org/10.1117/12.145523
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

Array-antenna patterns are calculated for arrays of radiators of time-limited signals. Antenna patterns are calculated in the time domain by superposition of temporal waveforms at various angles. Monocycle waveforms are used as canonical building blocks to illustrate the method. Pulses are short compared to the dimensions of the antenna and interference phenomena are localized to a percentage of the total aperture. Low sidelobes are achieved through two methods: (1) the limited interference phenomena afforded by monocycle excitation, and (2) randomization of individual element placement. Randomization of element placement serves to destroy periodicities in the physical aperture. In rectangular arrays where elements are arranged in rows, periodicities in the lattice along the principal planes make sidelobes higher along these planes than for off-axis directions. This behavior is evident in arrays using both short-pulse and sinusoidal excitation. Periodicities in the physical aperture of arrays of short- pulse radiators have also been associated with a narrow-banding effect manifesting itself as spikes in the spectral response at particular angles. Randomizing the positions of the individual radiators, each radiating a broad-band signal, helps keep the spectrum broad for all angles. Sidelobe levels have been demonstrated which are well below the 1/n limit associated with unipolar-impulsive signals where n is the number of radiating elements.

Citation Download Citation

James Doss Halsey and Eugene J. Sigal "Low-sidelobe array antenna simulation for time-limited signals", Proc. SPIE 1875, Ultrahigh Resolution Radar, (28 May 1993); https://doi.org/10.1117/12.145523

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Antennas

Radar

Receivers

Chemical elements

Signal processing

Superposition

Radiation effects

Show All Keywords

Keywords/Phrases

Search In:

Publication Years