Patent ID: 11888238
Assignee: NXP USA, INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A system comprising:
a first microstrip transmission line;
a second microstrip transmission line;
wherein the first microstrip transmission line and the second microstrip transmission line form portions of a conductive layer of a printed circuit board;
a slotline formation,
wherein the slotline formation extends between the first microstrip transmission line and the second microstrip transmission line to electromagnetically couple the first microstrip transmission line to the second microstrip transmission line; and
at least one controllable capacitance circuit electrically connected to at least one of the first microstrip transmission line and the second microstrip transmission line and including a control interface, wherein a magnitude of a capacitance value of a barium strontium titanate (BST) capacitor of the at least one controllable capacitance circuit is controllable in response to a capacitance control signal received at the control interface, wherein a magnitude of capacitance value of the at least one controllable capacitance circuit determines an impedance of the system;
wherein the at least one controllable capacitance circuit comprises:
a first controllable capacitance circuit electrically connected to the first microstrip transmission line and including a first control interface wherein a magnitude of a capacitance value of the first controllable capacitance circuit is controllable in response to a first capacitance control signal received at the first control interface; and
a second controllable capacitance circuit electrically connected to the second microstrip transmission line and including a second control interface, wherein a magnitude of a capacitance value of the second controllable capacitance circuit is controllable in response to a second capacitance control signal received at the second control interface.