Programmable amplitude and phase controller
OwnerChristos Tsironisinventor
Life of this patent
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Abstract
A continuously manually or remotely adjustable microwave attenuator and linear phase shifter uses a mobile signal coupler (wave-probe) and a slabline structure terminated with 50 Ohms. The coupled port of the wave-probe is connected with the output port of the unit using flexible RF cable. The wave-probe is attached to the vertical axis of a mobile carriage, which is moved at variable distance from the input port, corresponding to the expected transmission phase, whereas the depth, at which the wave-probe is inserted into the slabline, determines the coupling factor and thus the value of the attenuation. Amplifier and low pass filters compensate for coupling loss and equalize for frequency slope.
Claims12
A remotely adjustable RF attenuation and transmission phase controller (APC) comprising an input and an output port and transmission media between the ports;
- and a wideband adjustable signal coupler (wave-probe) inserted between the ports;
- said wave-probe having a coupled port and an isolated port,
- whereby part of the signal entering the input port is injected into the coupled port of the wave-probe,
- and is extracted from the output port,
- and whereby the adjustable coupling factor of the wave-probe controls the attenuation and the distance of the wave-probe from the input port controls the phase of the APC.
Dependencies are inferred from the claim text.