Spiral | Sinuous
Spiral and sinuous antennas, are traveling wave type antennas that offer wideband characteristics, circular polarization, and excellent performance in high-frequency applications. These compact and versatile antennas are perfect for a variety of applications, including wireless communication, satellite, radar systems and space exploration.
While both antennas offer wideband characteristics, circular polarization, and excellent high-frequency performance, the distinct geometries of spiral and sinuous antennas contribute to variations in their radiation patterns, impedance, and other specific parameters. These differences make each antenna type more suitable for certain applications.
Spiral antennas consist of a flat coil (either tightly or loosely wound, depending on requirements) that is a planar analog of the helical antenna.
These antennas offer wideband characteristics, circular polarization, and excellent high-frequency performance. Spiral antennas are often preferred for their compactness and hemispheric radiation pattern, making them ideal for satellite and wireless communication systems.
Sinuous antennas feature a meandering or zigzag shape, typically resembling a series of interconnected loops. These antennas, with their extended surface area, offer enhanced gain, bandwidth, and radiation efficiency over the spiral antenna, making them well-suited for radar systems, space exploration, and wireless connectivity solutions.