Microwave Antenna Principles and Practice Training

Microwave Antenna Principles and Practice Training

Introduction:

Microwave Antenna Principles and Practice TrainingCourse Description

Microwave antennas are indispensible for wireless and RADAR applications in commercial and government environments. This three – day Microwave Antenna Principles and Practice Training covers the theory and practice of microwave antenna design and test, providing a thorough grounding in their principles and technology. After considering the physical foundations of microwave antennas, we move to discussions of specifications for performance for various designs: primary elements (monopoles, dipoles, slots, helixes, and patches), reflector antenna systems (prime focus and folded optics, center-fed and offset-fed), and array antennas (planar arrays and phased arrays). Array antennas figure prominently in current and future applications and so are considered in detail later in the course. Installation of microwave antennas on vehicles, aircraft (manned and unmanned) and vessels is reviewed in detail as there are many timely applications in government and industry. Innovation in phased array antennas is covered based on case studies in space communications and terrestrial wireless. The integration of microwave principles and digital processing is described in the context of adaptive antennas, including MIMO and Smart Distributed Antenna Systems. Prediction of microwave antenna performance using software modelling tools is reviewed, including techniques for metallic structures and adaptive arrays. Measurement techniques are key to a successful antenna, so we consider the standard procedures for antenna measurement (anechoic near field ranges and far field ranges) as well as innovative approaches like the compact antenna range. Microwave antennas may pose a challenge when being installed on aircraft, ships and vehicles and so we review their integration under such constraints. The course wraps up with reviews of recent topics related to microwave antennas, including the NASA SCaN Test Bed on the International Space Station and a UAV case study.

Microwave Antenna Principles and Practice TrainingRelated Courses:

Duration:3 days

Skills Gained:

• Obtain a fundamental understanding of antennas from both theoretical and practical bases
• Be able to identify the characteristics and designs of antennas in current and evolving applications in microwave and millimeterwave bands
• Understand the means to design and predict antenna performance through principles and actual hardware examples
• Evaluate the capabilities of various types of reflector and array antenna systems
• Consider modern adaptive array technology as applied to several fields
• Learn how microwave antennas can be integrated into various platforms such as vehicles, vessels and aircraft (manned and un-manned)

Customize It:

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.

Course Content:

Theory of Microwave Antennas as related to modern applications

Electromagnetic radiation, directivity patterns – three dimensional and two dimensional, microwave and millimeter wave regions, quasi-optical design
Elemental antennas – monopole, dipole, helix, horn, slot, patch
Linear and circular/elliptical polarization – performance, cross-polarization isolation
Reflector antennas – illumination, optics, primary and secondary patterns, surface tolerance, pattern integration
Folded optics – Cassegrain, Gregorian, splash-plate/backfire
Non-blocking structures – the offset fed paraboloid
Planar array
Controlled phased array principles
Antenna requirements and constraints (directivity, gain, impedance, losses, beamwidth, sidelobes, polarization, power handling ability, RFI, antenna temperature, coverage)

Antenna characteristics, design and the selection of antenna elements

Flyswatter, parabolic and spherical reflector, torus
Helix designs, circular polarization, microwave polarizers
Antennas for space communications (area coverage, spot beams, omni)

Microwave antenna mounts, drives and controls

Az-El, X-Y and hybrid techniques
Tracking systems – monopulse, amplitude-based (step track)
Antenna control units
Ground-based tracking system examples (S and X band)

Understanding the various factors of the integration of antennas on mobile platforms

Vehicles – signal acquisition and tracking, stability on the move
Aircraft – low profile installations, withstanding the operating environment, operation at extreme latitude
Marine vessels – antenna placement above deck, harsh environment characteristics, stability

Special applications in antenna technologies and the associated challenges

Phased array antenna – active element case study for the Main Mission Antenna
Combining multiple microwave bands on the same antenna – multiport and dichroic feed systems
Waveguide lens at 20 GHz
Spatial multiplexing – adaptive arrays
Digital processor control – beam to beam coupling
Multiple-input, multiple-output (MIMO) – cellular coverage

In depth understanding of beam steering by discussing array antenna systems

Current active element technology, with solid state amplifiers
Low loss and low passive intermodulation (PIM) diplexing
Phase shifters
True-time delay devices
Application issues: grating lobes, beam squint, quantization errors, and scan blindness

Antenna modeling techniques

Modeling of conventional metallic structures
Modeling of adaptive arrays; discrete transform techniques

Antenna and microwave measurement techniques

Standard antennas for comparisons
Antenna gain measurement using directivity as the basis
Test beds for subsystem and system evaluation
Anechoic chambers
Bore sight ranges
Compact range and near field range
Satellites, radio stars and other reference sources

Antenna installation issues and solutions

Operation in difficult environments – high winds, hot or cold temperatures, use and effect of radomes
Interaction with structures and ground reflections
Placement to optimize performance or esthetics

RF interference reduction techniques – sidelobe suppression, filtering, cancellation

Review of innovative projects

SCaN Test Bed on the International Space Station
Distributed antenna systems
Discussion of the antennas used in an unmanned aerial system as real life case study in the class

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Time Frame: 0-3 Months4-12 Months

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