In this article, a new design approach for developing hybrid couplers with arbitrary power
division and the phase difference is presented. The design is based on a transformer-based …

With the continued development of communication technology, communication systems are
required to support ever more operational frequencies and standards, which has resulted in …

This letter proposes a novel compact coupler with simultaneously and continuously tuned
frequency, output differential phase, and power-dividing ratio (PDR). In addition to …

In this article, for the first time, a novel four-port coupler with reconfigurable multifunctions of
filtering rat-race coupler (FRC), filtering branch-line coupler (FBC), and conventional single …

A compact rat-race coupler with tunable frequency is presented. The frequency-
reconfigurable operation is achieved by attaching the frequency-reconfigurable matching …

Signal crosstalk and common-mode noise are two issues for engineers when designing
today's increasingly complicated microwave integrated circuits [1]. Compared with single …

In this article, a coupler with simultaneously tunable power division ratio (PDR) and phase
difference is proposed based on a multivector summation method. Two groups of varactor …

A simple simultaneous frequency-and power-dividing ratio-reconfigurable quadrature
coupler using lumped elements is presented for reconfigurable radio applications. The …

A highly reconfigurable and switchable patch coupler is presented with controllability of the
operating frequency, power-dividing ratio, and switching coupling direction for millimeter …

A novel coupled-line coupler with tunable frequency, coupling coefficient and phase
difference is proposed with a reduced number of varactor diodes. The proposed coupler …