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

Claim 12:
13. A method for providing impedance compensation for a radio frequency (RF) front-end, the method comprising:
receiving an RF signal at one of a first microstrip transmission line and a second microstrip transmission line, wherein a slotline formation extends between the first microstrip transmission line and the second microstrip transmission line to form a circuit which electromagnetically couples the first microstrip transmission line to the second microstrip transmission line, and wherein the first microstrip transmission line and the second microstrip transmission line are arranged linearly and formed from portions of a conductive layer of a printed circuit board; and
adjusting a capacitance value of a variable capacitor at an open stub of at least one of the first microstrip transmission line and the second microstrip transmission line to provide the impedance compensation; wherein a linearity of the circuit is substantially flat as a function of load phase.