Wideband Conical Spiral Antennas

Alaris Antennas Spiral Antennas

Alaris Antennas designs and manufactures a range of Spiral Antennas, which can be customised to suit each client’s requirements.

Spiral antennas belong to the class of frequency independent antennas which can be designed to operate over a wide range of frequencies. Polarization, radiation pattern and impedance of these antennas remain relatively stable over a large bandwidth.

The antenna  is designed to use two conductive spiralled arms, extending from the centre outwards. The antenna may be a flat disc, with conductors resembling a pair of loose spirals, or the arms may extend in a three-dimensional shape like a spring. The direction of antenna polarisation depends on the direction of rotation of the spiral.

Possible applications of these antennas are wideband communications, spectrum monitoring, direction finding and signal suppression.

The two types of spiral antennas that are offered by Alaris Antennas are cavity backed and conical spiral antennas.

Cavity backed spiral antennas are inherently circularly polarized with medium gain. An array of spiral antennas can be used to increase the gain. The cavity changes the antenna pattern to a directional shape.

Conical spiral antennas offer higher directionality and gain, which is often required for communications and signal suppression applications.

Below are the current spiral antenna designs offered by Alaris Antennas. Please click on each product to view it on our website.

  • Product Name
  • LHCP Cavity Backed Spiral Antenna
  • LHCP Cavity Backed Spiral Antenna
  • LHCP Cavity Backed Spiral Antenna
  • High Power Circular Polarised Antenna
  • High Power Circular Polarised Antenna
  • High Power Circular Polarised Antenna
  • High Power Circular Polarised Antenna
  • High Power Circular Polarised Antenna
  • Dual Port Circular Polarised Antenna
  • Frequency Range
  • 1000 – 4000 MHz
  • 1000 – 6000 MHz
  • 6000 – 18000 MHz
  • 400 – 450 MHz
  • 1000 – 6000 MHz
  • 1000 – 1600 MHz
  • 400 – 2500 MHz
  • 2000 – 6000 MHz
  • 1000 – 6000 MHz