Programmable two-port microwave network
Patent 4502028 Issued on February 26, 1985. Estimated Expiration Date: 
June 15, 2002. 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.
June 15, 2002. 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 References 3559108 3611199 Reflective signal controller Six-port measuring circuit Variable impedance synthesis apparatus Patent #: 4442416 InventorAssigneeApplicationNo. 06/388781 filed on 06/15/1982US Classes:333/109, Using directional coupler324/601, Calibration324/638, Scattering type parameters (e.g., complex reflection coefficient)333/245, LONG LINE ELEMENTS AND COMPONENTS333/262, Switch333/99RMISCELLANEOUSExaminersPrimary: Gensler, PaulAttorney, Agent or FirmInternational ClassH01P 5/04 (20060101)AbstractAn adjustable two-port microwave network having digitally controlled switches which enable the network to be set to a plurality reflection and transmission coefficients. The network facilitates the collection of a plurality of measurements which are necessary to characterize a non-linear device. An embodiment of the network is constructed using a 3dB directional coupler feeding two identical power divider networks each comprising two cascaded directional couplers. One divider network is connected directly to the coupled port of the 3dB directional coupler and the other divider network is connected through a phase shifter to the output port of the 3dB directional coupler. The non-linear device to be characterized is connected to the input port of the 3dB directional coupler and for this application, the isolated port is terminated in its characteristic impedance. | |
