The HC976 housed and HC976E embedded helical antennas are designed and crafted for high-accuracy positioning in a light and compact form factor, making them suitable for many applications: autonomous ...

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 ...

No audio available for this content. Harxon has released its next-generation triple-frequency Helix Antenna HX-CH7603A, which has excellent performance and high efficiency in a compact form factor, ...

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 ...

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.

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 ...

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 ...

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" ...

Receiving a signal from a geosynchronous satellite 22,300 miles out or a GPS satellite over 10,000 miles away is a challenge. Big gain antennas usually are necessary. But that’s just the opposite of ...