The Rise Of Embedded Antennas

Wireless hotspots are cropping up nearly everywhere these days

. Coffee houses and college campuses, large office buildings and living rooms and even entire towns are being rigged with access points that blanket an area with wireless Internet access. It's our addiction to data access and our desire of small and compact that has driven the development of the embedded antenna.

Embedded antennas have become quick, clean and easy to use in every day devices. Take for example a GPS navigation unit. GPS units and receivers contain embedded antennas within the unit itself. The main advantage of an embedded antenna is connection ease. There are no additional cables are required to connect to the GPS receiver from the antenna; everything is self-contained. Simply connect the GPS receiver to the computer and configure Network Stumbler to begin downloading GPS data.

Embedded antennas are available in frequency ranges from 100 kHz to 26 GHz. Antenna structures include patch, inverted F, slot, notch, horn, dipole, monopole, loop, conformal/printed, wrap-around/band-aid, spiral, conical, miniature, naturally & forced resonant, loaded or unloaded and hybrid combinations. Embedded antennas are available in different configurations or different applications.

In first generation wireless devices, external antennas were the norm and their integration was frequently an afterthought for device designers. As designers shifted to more demanding design requirements, smaller form factors and embedded antennas; antenna integration became more complex. Now, to ensure maximum performance in these new wireless devices, the antenna system needs to be among the first considerations in the product design.

Wireless technologies are of growing importance for a large variety of products. The integration of wireless connectivity into traditionally non-wireless or newly created devices can support interesting additional features. However, the path from a brilliant product idea to a successful end-product is sometimes stonier than expected. The complexities faced by manufacturers when trying to integrate off-the-shelf antennas into their products are often underestimated. Depending on a number of aspects such as technology, housing, shielding, cable routing etc., embedding an antenna into your product often becomes a surprisingly difficult and time-consuming task.

Four fundamental design and integration factors should be considered when designing for embedded antennas. These include board-level issues, housing and industrial design considerations, antenna selection, and antenna placement.

Wireless performance will be a key attribute driving customer satisfaction in next generation in-home networking devices. Working closely with antenna experts at every step of the device design process helps achieve excellent wireless performance at relatively low cost.

by: Chris Cowper

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