Interstage matching network attenuator

Abstract

A wireless communication device includes at least two antennas and transmitter circuitry incorporating an attenuation circuit. The attenuation circuit has a first port coupled to a first power amplifier and a second port coupled to a second power amplifier. A matching network connects the first and second ports and comprises a pair of coupled lines. Auxiliary lines are coupled to the coupled lines to enable programmable attenuation while maintaining wideband performance. The coupled-line matching network provides compact, low-loss interstage impedance matching and supports integration into mmWave RF transmit chains. By leveraging auxiliary lines and associated attenuation control, the device achieves fine gain programmability with minimal insertion loss and negligible area overhead, improving linearity and efficiency relative to transformer-based designs. This architecture is suitable for high-frequency systems requiring robust gain control across large bandwidths, such as sub-THz and mmWave radios.

Dependencies are inferred from the claim text.