Communications: radio wave antennas – Antennas – Measuring signal energy
Patent
1987-09-14
1989-01-17
Sikes, William L.
Communications: radio wave antennas
Antennas
Measuring signal energy
324525, G01R 100
Patent
active
047990635
ABSTRACT:
To isolate a fault in a radar system, prior art teaches the disassembling of many of the components of the radar system and, by means of trial and error, substituting each component and testing the complete radar system to determine if the substitution was correct. In the present invention, the transmission path of the radar system is divided into a number of sections, with each section being independently connected to an adapter. After a section has been connected to an adapter, a resistive load having an impedance matching that of the antenna is mated to the adapter. Subsequently, a pulse is outputted from the transmitter of the radar system and transmitted along the transmission path. If the transmission path between the transmitter and resistive load is without fault, then the signal reflected from the resistive load and measured by a VSWR meter near the transmitter would be below a predetermined threshold, as the resistive load substantially attenuates the power of the outputted pulse. On the other hand, if a fault does reside within the transmission path, then the power of the reflected signal would be at or above the predetermined threshold. By connecting the adapter to successive sections of the transmission path and by repeating the process of connecting the resistive load to the adapter and sending a pulse to the resistive load, a fault can be easily isolated.
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Grumman Aerospace Corporation
Johnson Doris J.
Sikes William L.
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