July 18, 2025

Forward and backward (directional) couplers differ in their signal sampling methods. Forward couplers extract a portion (typically ​​-10dB to -30dB​​) of the ​​incident wave​​ traveling toward the load, while backward couplers sample the ​​reflected wave​​. Forward versions exhibit ​​<0.5dB insertion loss​​, whereas backward types measure ​​VSWR​​ (1.05:1 to 1.5:1). Both use ​​50Ω/75Ω striplines​​ with ​​20-40dB […]

The Magic Tee (or Hybrid Tee) earns its name from its “magical” ability to split or combine RF signals with precise phase control. This 4-port waveguide divides input power equally (3dB loss) between two collinear ports while isolating the fourth port (20+ dB rejection). Its T-shaped design enables 180° phase shifts in the E-arm and

The two most common directional coupler values are ​​3dB​​ and ​​10dB coupling factors​​. A ​​3dB coupler​​ splits power equally (50%/50%) between output ports, ideal for balanced signal division in RF systems (e.g., antenna beamforming). ​​10dB couplers​​ sample ​​10% of input power​​ (with 90% throughput), used for signal monitoring in telecom (e.g., 5G base stations). Both

The Magic Tee (or ​​Hybrid Tee​​) is called a ​​3dB coupler​​ because it splits input power equally between two output ports with a ​​3dB attenuation​​ (halving the power). When signal enters the ​​H-arm (Port 3)​​, it divides ​​50/50​​ into the two collinear ports (Ports 1 & 2), while the ​​E-arm (Port 4)​​ remains isolated. This

A standard directional coupler has 4 ports: Input (Port 1), Transmitted (Port 2), Coupled (Port 3), and Isolated (Port 4). The coupled port samples 5-30 dB of the input signal (e.g., 10 dB for common RF applications), while the isolated port minimizes reflections (<-20 dB). Models vary—some have 3 ports if isolation isn’t needed. Key

A ​​directional coupler​​ samples RF signals unidirectionally (e.g., ​​-20dB coupling​​) with high isolation (​​>30dB​​), ideal for power monitoring. A ​​magic tee​​ (waveguide hybrid junction) splits signals into ​​equal amplitude (±90° phase shift)​​ across E- and H-arms, used in balanced mixers or antennas. Couplers handle ​​1–40GHz​​, while magic tees operate at ​​microwave frequencies (e.g., 8–12GHz)​​. ​​Basic