WIDEBAND RF DEVICE

摘要

An RF device includes an impedance transformation circuit having a plurality of first RF couplers. Each first RF coupler includes a first portion of a first transmission line winding disposed on at least one first printed circuit board (PCB) and is configured to be electromagnetically coupled to a first portion of a second transmission line winding disposed on at least one second printed circuit board (PCB). The RF device also includes a balun circuit includes a plurality of second RF couplers coupled to balanced port connections, each second RF coupler including a second portion of the first transmission line winding wound around the first portion of a first transmission line winding and configured to be electromagnetically coupled to a second portion of the second transmission line winding wound around the first portion of a second transmission line winding.

主权项

1. A radio frequency (RF) device configured to propagate an RF signal characterized by a predetermined wavelength (λ), the RF device comprising:
an integrated circuit housing including an unbalanced port connection and balanced port connections; an impedance transformation circuit disposed in the integrated circuit housing and including a plurality of first RF couplers, wherein the plurality of first RF couplers includes a first impedance transformation coupler coupled to the unbalanced port connection and a second impedance transformation coupler coupled to the first impedance transformation coupler, wherein each first RF coupler includes a first portion of a first transmission line winding disposed on at least one first printed circuit board (PCB) and a first portion of a second transmission line winding, wherein the first portion of the second transmission line winding is connected to ground and is disposed on at least one second printed circuit board (PCB), each first portion of the first transmission line winding and each first portion of the second transmission line winding being characterized by a line length substantially equal to λ/8, the first transmission line winding and the second transmission line winding having a first linewidth and a second linewidth, respectively; and a balun circuit disposed in the integrated circuit housing and including a plurality of second RF couplers coupled to the balanced port connections, wherein the plurality of second RF couplers includes a first balun coupler coupled to the first impedance transformation coupler and a second balun coupler coupled to the first impedance transformation coupler each second RF coupler including a second portion of the first transmission line winding integrally connected to the first portion of the first transmission line winding and a second portion of the second transmission line winding, wherein the second portion of the second transmission line winding is connected to ground, the first transmission line winding being configured to be electromagnetically coupled to the second transmission line winding, the second portion of the first transmission line winding and the second portion of the second transmission line winding being characterized by a line length substantially equal to λ/8. wherein the plurality of first RF couplers and