About Arnold History Literature Jobs Served Markets Travel Assistance Disclaimers Search the Arnold Site: all words any words exact phrase

HOME : ABOUT ARNOLD : SERVED MARKETS : TELECOMMUNICATIONS APPLICATIONS ENGINEERING APPLICATION EXAMPLE DESIGN ASSISTANCE FEA & BEA QUALITY & ENVIRONMENTAL PROTOTYPING, TESTING, TRAINING Market Segment Discussion Magnetic materials and assemblies are used in such diverse telecommunications applications as: Cell phone speakers and microphones Cell phone on-off switches Electromagnetic transducers Microwave collimators Power supply inductors & transformers Signal filters Signal transformers LEARN MORE Products: Flexible Bonded Magnets Advanced Magnetic Assemblies Permanent magnets Powder soft magnetic cores Technical Assistance: Application assistance Selecting permanent magnet materials Visit the Magnetics Technology Center Getting in touch with us: Contact us Click picture to enlarge. When electric current travels in a wire under DC (direct current) conditions, it is almost uniformly dispersed throughout the cross-section of the wire. Under AC (alternating current) conditions, and especially at higher frequencies, the current carrying electrons are located mostly on the skin of the conductor. At microwave frequencies, the current doesn't flow in a wire, it is "contained" in a waveguide. Permanent magnets and Electromagnets are used to focus, amplify and guide the microwaves. This illustration is of a microwave relay tower with several different antenna types visible. Transmission of the microwave signal to and from the antennas is by waveguide. Quality and Environmental Management Systems As evidence of our commitment to the telecommunications market and to continuous improvement, ISO 9001, ISO 9002 and QS 9000 certification has been achieved and selected manufacturing locations have also been certified under ISO 14001 for environmental compliance. Applications Engineering Whether your company has sophisticated in-house magnetics design capabilities or a more modest facility, our Applications Engineers are ready to support your efforts through the entire product life cycle including: • Conceptualization • Initial design • Prototyping • Design optimization • Pre-Production trials • Validation testing support • Production issues • Cost reduction activities • Next generation designs Additional capabilities: • Magnetic field mapping • Magnetic properties testing Magnetic Toner Roll Assembly Field Map Design Assistance Applications engineers at each of our manufacturing locations and at our world class Magnetics Technology Center in Marengo, Illinois (near Chicago), offer comprehensive design assistance. Magnetic modeling: 2D, Radially symmetric, 3D, Temperature dependence Design relationships to your Hall sensor and application Specifications Complete analysis includes studying the effects of the operate and release point of the Hall sensors compard to the magnetic output waveform Quadrature encoders Switches and latches Ratiometric / Linear Halls Pulse counters Complex holding force calculations Insert and overmolding designs Manufacturability analysis Measurement capability to verify design Magnetic Prototyping, Testing and Training Extensive magnetic prototyping and testing capabilities are available at the manufacturing locations and at our Magnetics Technology Center in Marengo, Illinois, USA. Seminars in Magnetics are also available either at the Technology Center or at your company location. These classes are tailored to satisfy your needs, whether for inexperienced, non-technical persons or your most expert designers. Boundary and Finite Element Analysis (BEA, FEA) Complex devices can be modeled using boundary or finite element analysis. Magnetic circuit analysis can lead to design innovation such as in this device which provides combinations of pole patterns to achieve precision switching of a Hall effect sensor (switch). Application Example Magnetic materials serve several purposes in the Telecommunications Market. For example, with the advent of cellular telephones came the need for high volume manufacture of small magnets for miniature microphones and speakers. These are economically manufactured of "sintered" alnico. A popular style of phone uses a "flip" cover over the keys. When the cover is opened, the phone turns on - - automatically. This is usually accomplished with a non-contact switching system using a sintered alnico magnet and a reed switch. The presence of the magnetic field passing through the conductors of the switch causes them to "pull" together, closing the circuit. When the magnet is moved away from the switch, the circuit opens. TOP | BACK | HOME | HELP | MAP | CONTACT Copyright © Arnold Magnetic Technologies Corporation. All Rights Reserved. Please send all web related questions/comments to the .