Baluns
R2026bBalun is a transformer used to connect an unbalanced source line to a balanced load or vise-versa. This structure provides a matching transition between unbalanced to balanced transmission lines with a 180 degree phase difference and an equal potential at the output port. Baluns are key components in balanced circuit topologies such as balanced mixers, push-pull amplifiers, balanced frequency multiplier, phase shifters, balanced modulators, dipole feeds and other wide range of applications.
Objects
balunCoupledLine | Create multisection coupled-line balun on X-Y plane (Since R2022a) |
balunMarchand | Create Marchand balun in microstrip form (Since R2022b) |
Functions
show | Display PCB component structure or PCB shape |
info | Display information about PCB component structure |
designCoupledLine | Calculate dimensions of coupled-line section for specified frequency (Since R2022a) |
designUncoupledLine | Calculate dimensions of uncoupled-line section for specified frequency (Since R2022a) |
designOutputLine | Calculate dimensions of output line section for specified frequency (Since R2022a) |
shapes | Extract all metal layer shapes of PCB component |
Featured Examples
Design a Marchand Balun for 2.4 GHz WiFi Balanced Mixer
Design a microstrip Marchand balun at 2.4 GHz for use in a WiFi balanced mixer front-end. A balanced mixer requires a balun to convert the single-ended local oscillator (LO) signal into a differential signal that drives the diode pair with 180-degree phase difference. The balunMarchand catalog element from the RF PCB Toolbox is used to design, visualize, and analyze the balun on a Rogers RO4003C substrate.
WiFi Balanced Mixer LO Chain: Bandpass Filter Cascaded with Marchand Balun
Designs the local oscillator (LO) signal conditioning chain for a 2.4 GHz WiFi balanced mixer. The LO chain consists of a coupled-line bandpass filter followed by a Marchand balun, both implemented on a Rogers RO4003C substrate. The two components are physically cascaded using pcbcascade and analyzed as a single integrated PCB structure.
