Download - Applied Technology Institute

Antenna and Array Fundamentals
Basic concepts in antennas, antenna arrays, and antennas systems
February 28 - March 1, 2012
Columbia, Maryland
$1795 (8:30am - 4:00pm)
Register 3 or More & Receive $100 00 Each
Off The Course Tuition.
Summary
This three-day course teaches the basics of
antenna and antenna array theory. Fundamental
concepts such as beam patterns, radiation resistance,
polarization, gain/directivity, aperture size, reciprocity,
and matching techniques are presented. Different
types of antennas such as dipole, loop, patch, horn,
dish, and helical antennas are discussed and
compared and contrasted from a performanceapplications
standpoint. The locations of the reactive
near-field, radiating near-field (Fresnel region), and farfield
(Fraunhofer region) are described and the Friis
transmission formula is presented with worked
examples. Propagation effects are presented. Antenna
arrays are discussed, and array factors for different
types of distributions (e.g., uniform, binomial, and
Tschebyscheff arrays) are analyzed giving insight to
sidelobe levels, null locations, and beam broadening
(as the array scans from broadside.) The end-fire
condition is discussed. Beam steering is described
using phase shifters and true-time delay devices.
Problems such as grating lobes, beam squint,
quantization errors, and scan blindness are presented.
Antenna systems (transmit/receive) with active
amplifiers are introduced. Finally, measurement
techniques commonly used in anechoic chambers are
outlined. The textbook, Antenna Theory, Analysis &
Design, is included as well as a comprehensive set of
course notes.
Instructor
Dr. Steven Weiss is a senior design engineer with
the Army Research Lab. He has a
Bachelor’s degree in Electrical
Engineering from the Rochester
Institute of Technology with Master’s
and Doctoral Degrees from The George
Washington University. He has
numerous publications in the IEEE on
antenna theory. He teaches both
introductory and advanced, graduate level courses at
Johns Hopkins University on antenna systems. He is
active in the IEEE. In his job at the Army Research Lab,
he is actively involved with all stages of antenna
development from initial design, to first prototype, to
measurements. He is a licensed Professional Engineer
in both Maryland and Delaware.
Course Outline
1. Basic Concepts In Antenna Theory. Beam
patterns, radiation resistance, polarization,
gain/directivity, aperture size, reciprocity, and matching
techniques.
2. Locations. Reactive near-field, radiating nearfield
(Fresnel region), far-field (Fraunhofer region) and
the Friis transmission formula.
3. Types of Antennas. Dipole, loop, patch, horn,
dish, and helical antennas are discussed, compared,
and contrasted from a performance/applications
standpoint.
4. Propagation Effects. Direct, sky, and ground
waves. Diffraction and scattering.
5. Antenna Arrays and Array Factors. (e.g.,
uniform, binomial, and Tschebyscheff arrays).
6. Scanning From Droadside. Sidelobe levels,
null locations, and beam broadening. The end-fire
condition. Problems such as grating lobes, beam
squint, quantization errors, and scan blindness.
7. Beam Steering. Phase shifters and true-time
delay devices. Some commonly used components and
delay devices (e.g., the Rotman lens) are compared.
8. Measurement Techniques Ised In Anechoic
Chambers. Pattern measurements, polarization
patterns, gain comparison test, spinning dipole (for CP
measurements). Items of concern relative to anechoic
chambers such as the quality of the absorbent
material, quiet zone, and measurement errors.
Compact, outdoor, and near-field ranges.
9. Questions and Answers.
What You Will Learn
• Basic antenna concepts that pertain to all antennas
and antenna arrays.
• The appropriate antenna for your application.
• Factors that affect antenna array designs and
antenna systems.
• Measurement techniques commonly used in
anechoic chambers.
This course is invaluable to engineers seeking to
work with experts in the field and for those desiring
a deeper understanding of antenna concepts. At its
completion, you will have a solid understanding of
the appropriate antenna for your application and
the technical difficulties you can expect to
encounter as your design is brought from the
conceptual stage to a working prototype.
22 – Vol. 111 Register online at www.ATIcourses.com or call ATI at 888.501.2100 or 410.956.8805