Planar magic-tee double balanced mixer
September 7, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesBroadband four-port TEM mode 180° printed circuit microwave hybrid Microwave mixer apparatus Monolithic microwave integrated circuit broadband mixer Wideband microwave hybrid circuit with in-phase or phase-inverted output signals Passive 180 degree broadband MMIC hybrid Dual quadrature frequency converter Broadband 180 degree hybrid Broadband multi-phase hybrid Microwave stripline circuitry Balanced high-frequency mixer having a Balun circuit InventorsAssigneeApplicationNo. 116744 filed on 09/07/1993US Classes:455/326, With balanced mixer333/121, Having hybrid-T (e.g., magic-T)455/330, With nonlinear impedance (e.g., diode)455/333Transistor or integrated circuitExaminersPrimary: Eisenzopf, Reinhard J.Assistant: Pham, Chi Attorney, Agent or FirmForeign Patent References
International ClassesH04B 001/26H01P 005/20 AbstractA broad bandwidth double balanced mixer with all circuitry contained on a single MMIC die is disclosed using planar magic tee hybrids to greatly reduce component quantity and die area. The hybrids comprise a Lange coupler followed by a capacitor and a quarter-wavelength transmission line on the direct path, in conjunction with a half-wavelength transmission line on the coupled path. The hybrid is essentially a planar realization of a magic tee, producing two equal magnitude outputs that are substantially 180 degrees separated in phase, with the coupled input terminated in 50 ohms. The mixer topology is a ring configured diode quad with two magic tee's at the RF and LO ports and a Wilkinson power divider at the IF port.Other References
Field of SearchParticular frequency conversion structure or circuitryIncluding distributed electrical parameter structure With balanced mixer Stripline With nonlinear impedance (e.g., diode) Transistor or integrated circuit Including hybrid-type network Having lumped parameters or impedances Having hybrid-T (e.g., magic-T) | |
