KYOCERA AVX Unveils LDS Cap Antenna for Reliable Iridium Satellite IoT

Satellite IoT is growing fast, but connecting compact devices through low-Earth-orbit networks still presents a challenge. Antenna performance has to stay consistent no matter where the device is on the planet or what direction it’s facing. To improve that reliability, KYOCERA AVX has released a new LDS cap antenna created in collaboration with Iridium and qualified for use with the Iridium Certus 9704 IoT module.

Making LEO Connectivity More Practical

Conventional satellite IoT systems often rely on flat ceramic patch antennas, which can limit performance at low elevation angles. The new LDS cap antenna takes a different approach. Using laser direct structuring, it forms a three-dimensional radiating surface that offers better gain and efficiency while remaining lightweight.

The design maintains right-hand circular polarisation with an even gain pattern from zenith to horizon, helping devices maintain a link even when the satellite is low on the skyline. Operating across both Iridium (1,616–1,626.5 MHz) and GNSS (1,559–1,610 MHz) bands, it delivers about 2 dBi peak gain and roughly 60 % radiation efficiency. That balance gives engineers a wider performance margin without adding bulk or weight.

Small Form, Broad Flexibility

The cap-style antenna measures 35.7 mm in diameter, 17.98 mm high, and weighs just under 7 g. Its compact shape supports standard surface-mount assembly and leaves the underside free for components, which helps conserve PCB area. The device handles up to 4 W, operates from −40 °C to +85 °C, and endures exposure to humidity, temperature cycling, and salt spray.

An optional evaluation board (70 × 70 × 32.5 mm) simplifies testing and integration. Both the antenna and the board have been approved as Iridium Qualified Antenna Products, ensuring full compliance with Iridium’s certification requirements.

Designed for Real-World IoT Systems

By replacing the traditional patch with a laser-structured 3D design, KYOCERA AVX offers a more compact and efficient way to achieve reliable satellite communication. The antenna’s bandwidth and radiation pattern make it well suited to telematics, remote monitoring, smart agriculture, and uncrewed systems that rely on Iridium’s LEO network for global coverage.

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