Multiple-port networks comprising only passive electrical elements as network components

HELECTRICITY H03Electronic circuits H03HIMPEDANCE NETWORKS

H03H7/00Multiple-port networks comprising only passive electrical elements as network components

H03H7/002Gyrators H03H7/004Capacitive coupling circuits not otherwise provided for H03H7/01Frequency selective two-port networks H03H7/0107Non-linear filters H03H7/0115comprising only inductors and capacitors H03H7/0123comprising distributed impedance elements together with lumped impedance elements H03H7/0138Electrical filters or coupling circuits H03H7/0146Coupling circuits between two tubes, not otherwise provided for H03H7/0153Electrical filters; Controlling thereof H03H7/0161Bandpass filters H03H7/0169Intermediate frequency filters H03H7/0176witout magnetic core H03H7/0184with ferromagnetic core H03H7/03comprising means for compensation of loss H03H7/06including resistors H03H7/065Parallel T-filters H03H7/07Bridged T-filters H03H7/075Ladder networks H03H7/09Filters comprising mutual inductance H03H7/12Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency H03H7/13using electro-optic elements H03H7/17Structural details of sub-circuits of frequency selective networks H03H7/1708Comprising bridging elements H03H7/1716Comprising foot-point elements H03H7/1725Element to ground being common to different shunt paths H03H7/1733Element between different shunt or branch paths H03H7/1741Comprising typical LC combinations, irrespective of presence and location of additional resistors H03H7/175Series LC in series path H03H7/1758Series LC in shunt or branch path H03H7/1766Parallel LC in series path H03H7/1775Parallel LC in shunt or branch path H03H7/1783Combined LC in series path H03H7/1791Combined LC in shunt or branch path H03H7/18Networks for phase shifting H03H7/185comprising distributed impedance elements together with lumped impedance elements H03H7/19Two-port phase shifters providing a predetermined phase shift H03H7/20Two-port phase shifters providing an adjustable phase shift H03H7/21providing two or more phase shifted output signals H03H7/24Frequency- independent attenuators H03H7/25comprising an element controlled by an electric or magnetic variable H03H7/251the element being a thermistor H03H7/253the element being a diode H03H7/255the element being a PIN diode H03H7/256the element being a VARACTOR diode H03H7/258using a galvano-magnetic device H03H7/27comprising a photo-electric element H03H7/30Time-delay networks H03H7/32with lumped inductance and capacitance H03H7/325Adjustable networks H03H7/34with lumped and distributed reactance H03H7/345Adjustable networks H03H7/38Impedance-matching networks H03H7/383comprising distributed impedance elements together with lumped impedance elements H03H7/40Automatic matching of load impedance to source impedance H03H7/42Balance/unbalance networks H03H7/422comprising distributed impedance elements together with lumped impedance elements H03H7/425Balance-balance networks H03H7/427Common-mode filters H03H7/46Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source H03H7/461particularly adapted for use in common antenna systems H03H7/463Duplexers H03H7/465having variable circuit topology H03H7/466particularly adapted as input circuit for receivers H03H7/468particularly adapted as coupling circuit between transmitters and antennas H03H7/48Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source H03H7/482particularly adapted for use in common antenna systems H03H7/485particularly adapted as input circuit for receivers H03H7/487particularly adapted as coupling circuit between transmitters and antennas H03H7/52One-way transmission networks H03H7/54Modifications of networks to reduce influence of variations of temperature