Antenna & Array Fundamentals Training
Antenna & Array Fundamentals Training Course Description
This three-day Antenna & Array Fundamentals Training 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 performance – applications standpoint. The locations of the reactive near-field, radiating near-field (Fresnel region), and far-field (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.
• 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.
With onsite Training, courses can be scheduled on a date that is convenient for you, and because they can be scheduled at your location, you don’t incur travel costs and students won’t be away from home. Onsite classes can also be tailored to meet your needs. You might shorten a 5-day class into a 3-day class, or combine portions of several related courses into a single course, or have the instructor vary the emphasis of topics depending on your staff’s and site’s requirements.
Basic concepts in antenna theory. Beam patterns, radiation resistance, polarization, gain/directivity, aperture size, reciprocity, and matching techniques.
RF Field Locations. Reactive near-field, radiating near-field (Fresnel region), far-field (Fraunhofer region) and the Friis transmission formula.
Types of antennas. Dipole, loop, patch, horn, dish, and helical antennas are discussed, compared, and contrasted from a performance/applications standpoint.
Propagation effects. Direct, sky, and ground waves. Diffraction and scattering.
Antenna arrays and array factors (e.g., uniform, binomial, and Tschebyscheff arrays).
Scanning from broadside. Sidelobe levels, null locations, and beam broadening. The end-fire condition. Problems such as grating lobes, beam squint, quantization errors, and scan blindness.
Beam steering. Phase shifters and true-time delay devices. Some commonly used components and delay devices (e.g., the Rotman lens) are compared.
Measurement techniques used 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.
Software simulation concepts. Discussion and distinction between: Finite Difference Time Domain (FDTD), the method of moments (MoM), and the Finite Element Method (FEM.) Some commercial codes that use these techniques.
Throughput and data rates. Various antennas are examined to quantify suitability for data transmission.
Special topics: The class can be tailored to meet the desired needs of the students.
Questions and answers.
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