Microwave delay assembly

In an amplifier system including a feedforward system incorporating a signal delay line;

• a delay line assembly, comprising:
• a housing member constructed of conductive metallic material forming an enclosed microwave cavity;
• a plurality of resonator rods affixed to sidewalls of the housing member, the plurality of resonator rods extending along a longitudinal dimension of the housing and being dimensioned in separation between rods and rod dimensions to be operative as a signal delay within a defined band of signal frequency;
• first and second transformer rods located at opposite ends of the housing member;
• an input co-axial connector mounted at a first end of the housing member and electrically connected to the first transformer rod;
• a first directional coupler mounted at the first end of the housing member including a first conductive line proximate to and electrically interactive with the first transformer rod for extracting electrical signals supplied at the input at the input co-axial connector at a specified dB level from the first transformer rod, and a first directional co-axial connector connected to the first conductive line for connecting to electrical apparatus external to the housing member;
• an output co-axial connector mounted at a second end of the housing member and electrically connected to the second transformer rod;
• a second directional coupler mounted at a second end of the housing member substantially opposite the first end and including a second directional co-axial connector for connecting to electrical apparatus external to the housing member and a second conductive line internal to the housing member connected to the second directional co-axial connector and the second conductive line positioned to be electrically interactive at a specified dB level with the second transformer rod for superimposing electrical signals onto the second transformer rod, and in turn supplying it to the output connector.