| 摘要 |
A SIGNAL SPLITTER CIRCUIT ACCEPTS AN INPUT SIGNAL AND CONVEYS THE INPUT SIGNAL TO TWO OUTPUT PORTS. THE CIRCUITS WITH MINIMAL AT - TENUATION, THROUGHOUT A VERY WIDE BANDWIDTH, AND ALSO EFFECTIVELY ISO - LATES THE OUTPUT PORTS FROM EACH OTHER. THE SIGNAL FROM THE INPUT PORT IS COUPLED TO AN AUTOTRANSFORMER, AND THE ENDS OF THE AUTOTRANSFORMER ARE CONNECTED TO THE RESPECTIVE OUTPUT PORTS. A BRIDGE LOAD CIRCUIT WHICH INCLUDES A TRANSFORMER WINDING AND A LOAD CONNECTED PARALEL, IS IN - DUCTIVELY COUPLED TO THE AUTOTRANSFORMER. THE BRIDGE LOAD CIRCUIT HAS NO CONNECTION TO THE SPLITTER CIRCUIT, OTHER THAN THROUGH THE INDUCTIVE COUPLING. THE SPLITTER CIRCUIT ALSO INCLUDES INDUCTIRS IN SERIES WITH THE OUTPUT PORTS AND CAPACITORS IN PARALLEL WITH THE OUTPUT PORTS. THE CIRCUIT PROVIDES A BALANCED BRIDGE CIRCUIT WHICH CANCELS SIGNALS TRAVELLING BETWEEN THE OUTPUT PORTS, AND THE INDUCTORS AND CAPASITORS PROVIDE IMPEDANCE MATCHING BETWEEN THE INPUT PORT AND OUTPUT PORTS. THE ARRANGEMENT OF THE BRIDGE LOAD CIRCUIT PLACES THE LEAKAGE INDUCTANCE OF THE AUTOTRANSFORMER OUTSIDE THE EFFECTIVE PATH OF THE BRIDGE LOAD CIRCUIT SO THAT THE LEAKAGE INDUCTANCE CANNOT CAUSE UNWANTED AND UNPREDICTABLE PHASE SHIFTS AT HIGH FREQUENCIES.FIG 3.
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