Product category:
Antennas and Feeders
News Release from: TDC (Telecom Design Communications) | Subject: Sarantel GeoHelix P2
Edited by the Electronicstalk Editorial
Team on 31 March 2006
Tiny GPS antenna resists more
interference
Sarantel's GeoHelix P2 embeddable GPS antenna is the smallest quadrifilar helix antenna providing high performance in difficult GPS applications.
Available now from TDC, Sarantel's GeoHelix P2 embeddable GPS antenna is the smallest quadrifilar helix antenna providing high performance in difficult GPS applications With its reduced sise, simplified feed, and immunity to common mode noise and proximity tuning, the GeoHelix P2 is the simplest antenna available for embedded applications, such as PDAs, smart phones, and other handheld navigation devices
This article was originally published on Electronicstalk on 18 Dec 2002 at 8.00am (UK)
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The GeoHelix P2 is particularly suitable to applications where the device is handheld, body-worn, or otherwise surrounded by high-relative-permittivity materials that would detune conventional materials.
Other suitable applications would be where the antenna is embedded within the device or if the antenna is tightly integrated with other antennas such as Bluetooth/GPS receivers.
Measuring only 10 x 17.75mm, the GeoHelix P2 builds on the industry-leading performance of the GeoHelix SMP GPS antenna.
At 30% the size of its predecessor, the P2 is even easier to embed in a product.
With a radome for external applications, the antenna measures 12 x 14 x 18.5mm.
The antenna benefits from a revolutionary feed system which further isolates the antenna from the radio platform, enhancing the already remarkable noise immunity characteristics of all PowerHelix filtering antennas.
The new feed system repositions the impedance matching element to the top of the antenna, stabilising the impedance transformation function of the feed and shrinking its size significantly.
Thanks to this new feed system, the total volume of the antenna is reduced by 30% when compared with the GeoHelix SMP antenna.
Simplifying the feed system further leads to a 10% improvement in peak gain, with the GeoHelix P2 antenna typically achieving -2.8dBc at zenith without a ground plane.
The GeoHelix P2 retains the GeoHelix family's excellent circular polarisation pattern, with broad beamwidth for low-to-horizon satellite reception, and immunity from proximity tuning effects.
Managing Director of TDC, Jerry Sandys comments: "This is the smallest GPS antenna we have".
"Customers will find it far easier to integrate than anything else with improved resistance to interference within near field".
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