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  • Compact Broadband Impedance Transformer
    Publication number: 20140118071
    Abstract: The present invention is directed to an impedance transformation device for use in a system having a characteristic system impedance, the device being characterized by a predetermined bandwidth having a center frequency. The device housing size is one-eighth wavelength of the center frequency. A first coupler is characterized by an even mode impedance and an odd mode impedance. The bandwidth is a function of the even mode impedance and the odd mode impedance substantially corresponds to the component port impedance. At least one second coupler is disposed in parallel with the first coupler and is characterized by the even mode impedance and the odd mode impedance.
    Type: Application
    Filed: March 1, 2013
    Publication date: May 1, 2014
    Applicant: ANAREN, INC.
    Inventors: Chong Mei, Ying Huang
  • Inverted style balun with DC isolated differential ports
    Patent number: 7605672
    Abstract: The present invention is directed to a balun that includes a first coupler structure having a first port of a balanced port pair and an unbalanced port. A second coupler structure includes a second port of the balanced port pair. The second coupler port structure being connected to the first coupler structure such that the second port of the balanced port pair is DC isolated from the first port of the balanced port pair without decoupling components.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: October 20, 2009
    Assignee: Anaren, Inc.
    Inventor: Niels H. Kirkeby
  • RF termination
    Patent number: 9929456
    Abstract: The present invention is directed to an RF termination device that includes a substrate having a first meandered transmission line disposed on a first surface thereof. The meandered first transmission line has a predetermined first transmission line length and a characteristic impedance substantially equal to twice the predetermined system impedance. One end of the first meandered transmission line is configured as an open circuit. A second meandered transmission line is disposed on the first major surface adjacent the first meandered transmission line. The meandered second transmission line has a predetermined second transmission line length and a characteristic impedance substantially equal to twice the predetermined system impedance. One end of the second meandered transmission line is coupled to the other end of the first transmission line and the other end is coupled to ground.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: March 27, 2018
    Assignee: ANAREN, INC.
    Inventor: Chong Mei