When you think of satellite communications, you probably think of a dish. But that’s not the only option — a new device from the American University of Beruit and Stanford created a portable antenna ...

Bi-stable: The helix-based antenna switches between its two operating modes as it contracts (left) and extends (right). (Courtesy: Reconfigurable & Active Structures Lab) A lightweight, easily ...

No audio available for this content. Helix Technologies Ltd., a U.K.-based developer of high-performance, ceramic-based helix antennas, has secured funding that will enable continued development of ...

The quadrifilar helix antenna (QHA) has emerged as a versatile solution for modern communication systems requiring compact form factors, wide angular coverage and stable circular polarisation.

In general, this type of antenna consists of one or more conductive wires wound in a helix (like a corkscrew) around a central support mast. The new "bi-stable deployable quadrifilar helix antenna" ...

No audio available for this content. The new helical antenna in both housed (right) and unhoused form. (Photo: Allison Barwacz) Tallysman, a manufacturer of high-performance GNSS and iridium antennas, ...

THE most widely proposed hand-held antenna for mobile satellite communication systems is the Quadrifilar Helix Antenna (QHA). The QHA is preferred to the crossed dipole and the patch for its small ...

Helix Geospace has launched the world’s smallest Iridium antenna, which can operate safely near the human head with minimal performance degradation. The antenna can be used for mobile handsets, ...

Building antennas is a time-honored ham radio tradition. Shortwave antennas tend to be bulky but at VHF frequencies the antenna sizes are pretty manageable. [Fjkaan’s] 2 meter quadrifilar helicoidal ...