Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1983-11-07
1988-05-10
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular coupling link
340514, 342165, 343703, 343714, 343760, 343853, 343894, 343905, 379 1, 379 2, 379 26, 324510, 324 58B, 324 585B, G08B 100, G01R 2704, H01Q 132
Patent
active
047438878
ABSTRACT:
A test system for microwave circuits such as employed in aircraft wherein a plurality of antennas are connected to a single processor whereby the continuity of the antennas and connectors between the antennas and the processor can be determined. A test signal is applied to the various antennae of the aircraft and the return signals therefrom received by a test antenna disposed in conjunction with a low-loss coupler from outside of the aircraft. An automated test circuit provides for inputting an identifier of the antenna and circuit portion being tested, and for determining the fault location within the circuit as a function of the circuit portion under test and the distance to the fault; and for displaying the fault location within the circuit. In one embodiment, the low-loss coupler includes the use of a plurality of test antennas in combination with a divider circuit connected to the test antennas by transmission lines. The divider divides the output test signal between the antennas and combines the received signal portions into a composite return signal. In a second embodiment, the low-loss coupler includes a member having a plurality of microwave reflective surfaces disposed to reflect a substantial portion of the radiation pattern of the output signal from the aircraft antenna onto the test antenna.
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Crosland Donnie L.
Sanders Associates Inc.
Seligman Richard I.
Weinstein Stanton D.
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