High Power, Low Cost Ceramic Quadrature Couplers

摘要

Many of today's high power amplifiers for cellular and PCS base station use are assembled in a network composed of several medium power amplifier stages coupled with 90° quadrature hybrids or couplers. The quadrature couplers are preferred over Wilkinson splitters because they improve individual amplifier performance by shunting some of the mismatch reflections to the associated terminations, thus protecting the input of the subsequent amplifier stage.