Hybrid circuit having separate coupling transformers at the sum port and difference port and having tuning means to improve operation

Claim 1

BROADBAND ELECTRICAL HYBIRD APPARATUS COMPRISING A PAIR OF COIL SECTIONS EACH HAVING A DIFFERENT CONNECTION PART AT ONE END THEREOF, BALANCE-TO-UNBALANCE TRANSFORMER MEANS HAVING WINDING MEANS CONNECTED WITH SAID COIL SECTIONS AT THE SITES OF SAID CONNECTION PORTS AND INDUCTIVELY COUPLING SIGNALS BETWEEN A THIRD CONNECTION PORT AND SAID COIL SECTIONS, TRANSFORMER MEANS INCLUDING WINDING MEANS CONNECTED WITH THE OTHER ENDS OF SAID COIL SECTIONS TO CONDUCT NET CURRENTS FLOWING THROUGH SAID COIL SECTIONS AND THEREBY INDUCTIVELY COUPLING SIGNALS BETWEEN A FOURTH CONNECTION PORT AND SAID COIL SECTIONS, AND MEANS TUNING THE EFFECTIVE SHUNT AND SERIES INDUCTANCES OF SAID COIL SECTIONS AND TRANSFORMER MEANS IN BANDPASS FILTER RELATIONSHIP, WHEREBY THE POWER OF SIGNALS INDEPENDENTLY APPLIED TO SAID FOURTH PORT AND TO SAID THIRD PORT IS DIVIDED EQUALLY BETWEEN SAID DIFFERENT PORTS, AND WHERBEY SIGNALS APPLIED TO SAID DIFFERENT PORTS PRODUCE SUMMATION SIGNALS AT SAID FOURTH PORT AND DIFFERENCE SIGNALS AT SAID THRID PORT.