Improvement Methodof Input-Impedance Characteristics inElectronic Choke forWire Communication System -Effective UseofElectric andMagnetic Couplings inInductor

Most wirecommunication systemsutilize communication lines aspowerlines. Thepowered terminal needstoseparate accommunication signals anddcsupply powerinitsinputpartconnected tothecommunication lines. Inourcommunication system, itispreferable thatthe electronic chokebebidirectional. So,we havealready proposed alow-loss electronic chokewithsmallinductors andanamplifier. Thiscircuit canbealsousedinthe powering terminal. Theelectronic chokehashighinput impedance against communication signals. Thefrequency rangeofacceptable signals isdetermined mainlyby resonance frequency oftheinductors. Inthispaper,a methodfitting thisfrequency rangetothecommunication signal isproposed. Torealize this, weintroduce aninductor havingnew structure andexternal connection. By the effective useofelectric coupling andmagnetic coupling in windings, inputimpedance oftheelectronic chokeis increased. ,~~~~~~ 4Powering