The microSplatch™ uSP410 series antennas support embedded Sub-1 GHz low-power, wide area (LPWA) applications including LoRaWAN®, Sigfox® and HaLow™, and ISM/unlicensed band applications such as remote sensing and control. Single-band antennas are available for the 433 MHz, 868 MHz ,and 915 MHz bands. uSP410 series monopole antennas use a grounded-line technique to achieve outstanding performance in a compact surface-mount package.
Wireless devices are often designed based on antenna performance measured on an evaluation board. In practice, however, many wireless devices are used in the presence of materials near the antenna which were not present during evaluation. These materials, such as batteries, components on the PCB, or even a person’s body or hand, can cause a shift in the frequency performance of the antenna, resulting in less than optimal device performance. The shift in the frequency performance can be quite dramatic, especially for monopole (1/4 wavelength) antennas.
The uSP410 Series antennas are designed to help reduce the impact of nearby objects on the performance of the antenna by using a grounded line technique to reduce the overall length of the antenna radiator to provide wider bandwidth for better immunity to frequency shifts, while using a multilayer PCB to maintain a lower profile and small size. Matching components can be added, if necessary, to mitigate larger proximity effects from features like metal shields or enclosures.