2 to18GHz Planar Spiral Antenna

Planar Spiral Antenna 2-18GHz for Airborne and Radar Applications

This product is a professional Helical Antenna in the form of a planar spiral design. The antenna operates from 2GHz to 18GHz and is built using PCB technology for low cost and consistent quality. As a Planar Spiral Antenna, it features ultra wideband coverage with very high bandwidth ratios that allow a single antenna to cover multiple frequency bands. This reduces the number of antennas needed on a platform. The antenna provides right hand circular polarization, which helps resist multipath effects, polarization mismatch, and rotation induced fading. The low profile planar design makes it easy to integrate into various platforms and allows conformal mounting on curved surfaces. The antenna features an SMA K type connector for easy connection to RF systems.

This planar spiral antenna delivers solid electrical performance across its ultra wide operating range from 2GHz to 18GHz. The Voltage Standing Wave Ratio (VSWR) is rated at 2.5, which is acceptable for this type of ultra wideband spiral design. The gain is -2dB or higher, providing sufficient signal reception for short to medium range communication and sensing tasks. The axial ratio is 3.0dB or better, ensuring good circular polarization purity. The PCB construction keeps manufacturing cost low while maintaining consistent electrical performance. The compact size of φ65*53mm makes the antenna very easy to mount on space constrained platforms. The low profile design adds minimal height to the mounting surface.

One clear strength of this Planar Spiral Antenna is its ultra wideband coverage and circular polarization capability. It is widely used in satellite navigation, electronic countermeasures, UAV systems, short range communication, radar, and millimeter wave communication. The wide bandwidth means one antenna can handle tasks across multiple frequency bands from 2GHz to 18GHz, simplifying equipment inventory and reducing weight on airborne platforms. The right hand circular polarization is especially valuable for satellite communication and navigation systems where signals are transmitted with circular polarization. The conformal mounting capability allows the antenna to be embedded into the skin of UAVs and aircraft without creating drag or protrusions. The PCB based construction makes this antenna suitable for volume production.

In practical use, this Planar Spiral Antenna handles professional wideband tasks very well. For UAV and airborne platforms, the low profile and light weight minimize impact on flight performance. The circular polarization maintains link quality even when the UAV banks or turns. For electronic countermeasure systems, the ultra wideband coverage allows detection and jamming across multiple frequency bands with a single antenna. For short range radar and communication systems, the consistent performance across the band provides reliable operation. The SMA K connector provides a precise, compact connection point. It stands as a solid example of how a well designed Planar Spiral Antenna can meet the demanding needs of airborne, radar, and electronic warfare applications from 2GHz to 18GHz.