US 2024/0258676 A1 · Switchable Directional Coupler with Intermediate Termination State

Abstract

Quarter-wavelength switchable directional coupler architectures and methods that that use intermediate terminated states during directional mode-switching events to prevent generation of reflection coefficients that cause spur generation. A first embodiment of the invention utilizes existing circuitry within a quarter-wavelength switchable directional coupler but alters the conventional mode-switching sequence by adding new stage sequences to effectuate intermediate terminated states to mitigate or prevent spurs. A second embodiment of the invention modifies existing circuitry within a quarter-wavelength switchable directional coupler by adding a cross-coupled intermediate-stage termination circuit, and alters the conventional mode-switching sequence by adding new stage sequences to effectuate intermediate terminated states to mitigate or prevent spurs. A third embodiment of the invention also modifies existing circuitry within a quarter-wavelength switchable directional coupler by adding dual independent intermediate-stage termination circuits, and alters the conventional mode-switching sequence by adding new stage sequences to effectuate intermediate terminated states to mitigate or prevent spurs.

Claims10

Dependent claims

A quarter-wavelength switchable directional coupler having a forward mode of operation and a reverse mode of operation, the quarter-wavelength switchable directional coupler including:

(a) a primary transmission line having a first port and a second port;
(b) a secondary transmission line having a third port and a fourth port;
(c) a first independent termination circuit selectively couplable to the third port;
and
(d) a second independent termination circuit selectively couplable to the fourth port;
wherein the first independent termination circuit terminates the third port and the second independent termination circuit terminates the fourth port during transitions of the quarter-wavelength switchable directional coupler between the forward mode of operation and the reverse mode of operation.

3 more elements

Dependencies are inferred from the claim text.

Switchable Directional Coupler with Intermediate Termination State

Life of this patent

Switchable Directional Coupler with Intermediate Termination State

Life of this patent

Abstract

Claims10