Light and RF transparent enclosure for use with asset tracking device

摘要

An electromagnetic (RF) and light transparent enclosure having a perforated metallic wall. The enclosure is particularly adapted for an RF wireless tracking system, as a housing for the transmitter device or for a cargo container in or on which the transmitter device is positioned. The enclosure is optically transparent to ensure any photovoltaic device of the transmitter device receives sufficient photons or other energy to power the transmitter device. The RF transparent enclosure attenuates less transmitted and/or received signal at specific frequency bands.

主权项

1. A wireless RF transmitter device, the transmitter device comprising:
an RE communication module having an RF operating frequency, the operating frequency having an operating wavelength; and an enclosure enclosing the communication module, the enclosure having at least one wall comprising a metallic plate having a pattern of apertures therethrough and a dielectric plate adjacent to the metallic plate, each of the apertures having a length and a width, with the apertures arranged in columns and rows, with adjacent apertures in a row having a spacing therebetween, and a spacing between centers of adjacent apertures in adjacent rows, wherein the apertures are shaped, sized and spaced to allow passage therethrough of the RF operating wavelength.