Patent ID: 11862864
Assignee: ANALOG DEVICES, INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A true time-delay (TTD) phase shifter structure comprising:
a signal conductive line disposed on a first layer of the structure;
a first switchable ground plane comprising a first conductive plane disposed on a second layer of the structure;
a second switchable ground plane comprising a second conductive plane disposed on a third layer of the structure, wherein the first, second, and third layers are separate layers of the structure;
a first switch coupled between the first switchable ground plane and a first ground element, the first ground element disposed on the second layer; and
a second switch coupled between the second switchable ground plane and a second ground element, the second ground element disposed on the third layer;
wherein the second switchable ground plane is spaced apart from the signal conductive line by a greater distance than the first switchable ground plane.