Internal line replaceable unit high intensity radiated field detector

摘要

Various embodiments for detecting a high Intensity radiated field (HIRF) in a line replaceable unit are provided. For example, an internal detector includes at least one antenna attached to a chassis. The at least one antenna is configured and dimensioned to pick up an electromagnetic field. The electromagnetic field induces a current in the at least one antenna proportional to a magnitude of the electromagnetic field. The internal detector also includes a circuit configured to generate a DC signal based on the induced current in the at least one antenna and a processing section configured to compare the DC signal with a threshold and output a result of the comparison to a built-in test section. The internal detector may be used to test EMI filter pin connectors of a closed line replaceable unit.

主权项

1. A line replaceable unit (LRU) comprising;
at least one circuit board, each of said at least one circuit board comprising circuit components mounted thereto; a chassis comprising three orthogonal sides; a built-in test section; an external connector having an electromagnetic interference EMI filter; and an internal high intensity radiated field (HIRF) detector, said HIRF detector comprising:
a plurality of antenna, where an antenna of the plurality of antennas is attached to each of the three orthogonal sides, the plurality of antennas being configured and dimensioned to pick up an electromagnetic field having a frequency range of 100 MHz to 1 GHz, the electromagnetic field inducing a current in at least one of the plurality of antennas proportional to a magnitude of the electromagnetic field;a multiplexer configured to select the induced current on one antenna from among the plurality of antennas for further processing;a circuit configured to generate a DC signal based on the selected induced current; anda processing section configured to compare the DC signal with a threshold and output a result of the comparison to the built-in test section.