Phase shifter tuning using discrete switchable open stubs

A method, comprising:

• electrically coupling, by a system comprising at least one controller, radio frequency (RF) signals obtained at an input of RF transmission line set to one or more respective selectable phase shift transmission lines of a device, and to one or more true time delay transmission lines, the electrically coupling comprising:
• obtaining a specified phase shift value;
• controlling a first respective phase change material switch set on the device to couple a first set of the one or more respective selectable phase shift transmission lines to the RF transmission line set;
• and
• controlling a second respective phase change material switch set on the device to couple a second set of the one or more respective selectable true time delay transmission lines to the RF transmission line set,
• wherein the first set of the one or more respective selectable phase shift transmission lines coupled to the RF transmission line set, and the second set of the one or more respective selectable true time delay transmission lines coupled to the RF transmission line set, correspond to the specified phase shift value with respect to phase shift applied to an RF signal obtained at the input and routed to an output of RF transmission line set via the device.

A tunable phase shift device, comprising:

• a radio frequency (RF) input port;
• an RF output port;
• respective multistate RF switches;
• a first main RF signal transmission line coupled between the RF input port and the RF output port;
• a second main RF signal transmission line coupled between the RF input port and the RF output port;
• respective first phase shift transmission lines configured to be selectively coupled to the first main transmission line by a first group of the respective multistate RF switches;
• respective second phase shift transmission lines configured to be selectively coupled to the second main transmission line by a second group of the respective multistate RF switches;
• respective first true time delay transmission lines comprising respective first stub capacitors configured to be selectively coupled to the first signal transmission line set by a third group of the respective multistate RF switches;
• and
• respective second true time delay transmission lines comprising respective second stub capacitors configured to be selectively coupled to the first signal transmission line set by a fourth group of the respective multistate RF switches,
• wherein, to determine an operating phase shift of the tunable phase shift device with respect to RF signals routed from the RF input port to the RF output port via the first main RF transmission line and the second main RF transmission line, at least one controller controls:
• respective first conductive or nonconductive states of the respective first group of the multistate RF switches to respectively couple or decouple the respective first phase shift transmission lines to the first main RF signal transmission line;
• respective second conductive or nonconductive states of the respective second group of the multistate RF switches to respectively couple or decouple the respective second phase shift transmission lines to the second main RF signal transmission line;
• respective third conductive or nonconductive states of the respective third group of the multistate RF switches to respectively couple or decouple the respective first true time delay transmission lines to the first main RF signal transmission line;
• and
• respective fourth conductive or nonconductive states of the respective fourth group of the multistate RF switches to respectively couple or decouple the respective second true time delay transmission lines to the second main RF signal transmission line.