Internal Structure of a Dual Directional Coupler

Core Components

The Dual Directional Coupler includes a main transmission line and two sets of coupling transmission lines, forming the device's basic framework.
The main transmission line transmits the primary signal using low-loss conductive materials to minimize energy attenuation.
Two sets of coupling transmission lines are distributed parallel to each other on either side of the main transmission line or at specific locations.
These coupling lines use materials matching the main transmission line, with structural design specifically adapted to the coupling requirements of both forward and reverse signals.
These components are key for bidirectional signal extraction.

Internal transmission lines employ a precise layout design, maintaining fixed relative positions between the main and coupling transmission lines.
The layout fully considers electromagnetic coupling effects, optimizing arrangement to ensure electromagnetic field energy efficiently acts on coupling lines.
Two sets of coupling transmission lines are symmetrically distributed or at specific angles.
This design ensures coupling efficiency with the main transmission line while avoiding electromagnetic interference between lines.
This layout provides structural support for bidirectional signal separation.

Beyond transmission lines, the system includes impedance matching and isolation components.
Impedance matching components adjust transmission line impedance characteristics, ensuring minimal reflection during main signal transmission.
This improves signal integrity and allows stable extraction of coupled signals.
Isolation components are positioned between the two sets of coupled transmission lines and their output ports.
Through special electromagnetic shielding design, they block crosstalk between forward and reverse coupled signals.
This ensures independent transmission of signals in both directions, strengthening directional coupling capability.

The overall structure is compact and integrated, with all components assembled into a single unit using precision processes.
The design results in small size and strong mechanical stability.
Structural design considers both electromagnetic performance and practical application requirements.
Ensures coupling consistency over a wide frequency range with good temperature adaptability and anti-interference capabilities.
This structural design allows the Dual Directional Coupler to achieve bidirectional coupling while meeting installation requirements in different scenarios.
Successfully balances performance and practicality.