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What's special about Sarantel's PowerHelix™ Filtering Antenna Technology?
Sarantel antennas don't detune when near people or objects.
Sarantel antennas combine form (loop topology), materials (high dielectric ceramic), and structure (balance) to very tightly constrain the antenna's near field. As a result, the antenna is highly tolerant to the close proximity of people, other components and other antennas. System designers like these features as the antenna is not easily detuned, yielding a predictable, repeatable and reliable response in all application circumstances.
Sarantel antennas are easy to embed.
Because they're balanced and don't interact with other components, Sarantel antennas are the easiest antennas to embed in a device. Conventional antennas use the entire device to create their actual electrical resonating size; as a result, small changes to the device mean large changes to the antenna. Sarantel antennas are isolated from the device, so changes to the device don't impact the antenna at all. RF engineers can treat the antenna as a standard component rather than an ongoing design headache!
Sarantel GeoHelix® GPS antennas are omni-directional.
Sarantel's GeoHelix® GPS antennas form a near-ideal Euclidean cardioid pattern, providing the broadest possible beamwidth. This is especially important for satellite reception near the horizon. The GeoHelix maintains this pattern even when near other objects due to its unique near field properties. Regardless of the orientation of the device, signal integrity is maintained.
Sarantel antennas are small.
Sarantel antennas use high dielectric materials to shrink the antenna to the smallest possible size, while maintaining high application efficiency. Balanced antennas do not require a ground plane to work, so they don't resonate against the entire device. Theoretically, the device can be made as small as the antenna without sacrificing efficiency.
Sarantel antennas act as their own filters.
Sarantel antennas are designed with a very sharp filtering response. The GeoHelix® GPS antenna attenuates signals in common GSM and ISM bands by 25-30dB, and has a 3dB fractional bandwidth of only 1.25%. Many applications do not require additional filtering between the antenna and receiver.
Sarantel antennas reject common mode noise.
Today's converged wireless devices are a maelstrom of RF noise. This makes it particularly difficult to implement a receiver with the sensitivity requirements of GPS. Because they're balanced, Sarantel antennas provide no conductive path between the ground plane of the receiver and the antenna, and thus prevent common mode noise from entering the receiver through the antenna path.
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