Adjustable signal sampling sensor and method
OwnerChristos Tsironisinventor
Life of this patent
Estimating the term…
Abstract
Wideband low loss signal couplers use an electric field antenna for voltage detection and a magnetic loop for current detection both placed inside and coupled to the center conductor of a coaxial or parallel plate airline. The signal coupling factor increases with frequency thus favoring detection of harmonic components generated by the nonlinearly operated RF transistors. In order to adapt also to various power levels and associated harmonic receiver sensitivity the detectors can be adjusted such as to vary the basic level of coupling. A calibration method allows considering non-infinite directivity of the signal couplers to be accurately considered even when they are terminated with very high VSWR, generated by impedance tuners connected to the signal couplers.
Claims4
A microwave signal coupler comprising an input port and an output port and two coupled ports;
- and a low loss slotted transmission airline between said input port and output port;
- said airline having a center conductor and a ground mantle;
- and a capacitive electric field sensor inserted into the slotted transmission airline perpendicularly to the axis of the slotted transmission airline and coupled in a non-contacting manner with the center conductor;
- whereby said electric field sensor comprises a coaxial cable and its protruding center conductor on one the end which is placed in proximity to the center conductor, the other end of said cable being connected with a coupled port;
- and a magnetic field loop sensor comprising a magnetic loop on one end and being attached on a coupled port connector on the other,
- said magnetic loop being placed in proximity of the center conductor and coupled in a non-contacting manner with the center conductor;
- whereby said electric field sensor can be displaced laterally across the width of the slotted transmission airline oriented perpendicularly to the center conductor.
A microwave signal coupler comprising an input port and an output port and two coupled ports;
- and a low loss slotted transmission airline between said input port and output port;
- said slotted transmission airline having a center conductor and a ground mantle;
- and a capacitive electric field sensor inserted into the slotted transmission airline perpendicularly to the axis of the slotted transmission airline and coupled in a non-contacting manner with the center conductor;
- and a magnetic field loop sensor inserted into the slotted transmission airline perpendicularly to the axis of the slotted transmission airline having one end coupled in a non-contacting manner with the center conductor and the other end operatively connected with a coupled port;
- whereby at one end the center conductor of said coaxial cable protrudes and connects with the outer ground mantle of said cable forming a magnetic field loop, and whereby the other end of said cable is connected with a coupled port;
- whereby the plan of the magnetic field loop can be rotated around the axis of the coaxial cable,
- whereby a controllable amount of magnetic field energy is captured by said magnetic field loop.
A microwave signal coupler comprising an input port and an output port and two coupled ports;
- and a low loss slotted transmission airline between said input port and output port;
- said slotted transmission airline having a center conductor and a ground mantle;
- and a capacitive electric field sensor inserted into the slotted transmission airline perpendicularly to the axis of the slotted transmission airline and coupled in a non-contacting manner with the center conductor;
- and a magnetic field loop sensor inserted into the slotted transmission airline perpendicularly to the axis of the slotted transmission airline having one end coupled in a non-contacting manner with the center conductor and the other end operatively connected with a coupled port;
- whereby at one end the center conductor of said coaxial cable protrudes and connects with the outer ground mantle of said cable forming a magnetic field loop, and whereby the other end of said cable is connected with a coupled port;
- whereby the plan of the magnetic field loop can be displaced laterally across the width of the slotted transmission airline oriented perpendicularly to the center conductor,
- whereby a controllable amount of magnetic field energy is captured by said magnetic field loop.
Dependencies are inferred from the claim text.