What is the coupler used?

A coupler (Coupler) is a device or device used to transmit signals or energy. Its main function is to transfer signals or energy from one circuit or system to another circuit or system while achieving appropriate electrical isolation or matching. The following are common applications and functions of couplers:

1. Signal transmission: Coupler can be used to transmit signals from one circuit or system to another circuit or system. For example, a fiber coupler may transmit an optical signal from one optical fiber to another, and a radio frequency coupler may transmit a radio signal from one antenna to another.

2. Energy transmission: Coupler can be used to transfer energy from one circuit or system to another circuit or system. For example, a power coupler may be used to transfer electrical energy from an electrical grid into an electric vehicle charger.

3. Electrical isolation: Some couplers also have the function of electrical isolation, which can isolate the ground or potential difference between the input and output circuits or systems. This provides electrical isolation, reduces the introduction of noise and interference, and improves the safety and stability of the system.

4. Matching and Adaptation: A coupler can also be used to match or adapt impedances or characteristics between different circuits or systems. For example, the transformer coupler can match the impedance between the input circuit and the output circuit to achieve maximum efficiency of energy transfer.

A coupler is an important electronic device used to transfer signals or energy from one circuit or system to another circuit or system while achieving proper isolation, matching, and adaptation. It has a wide range of applications in the fields of communication, energy transmission and circuit design.

Structural principle of coupler

The structure and principle of the coupler are different due to its type and application. The following will introduce the structural principles of several common couplers:

1. Fiber coupler: Fiber coupler is a device that couples signals by transmitting optical signals from one optical fiber to another. Common structures include fiber butt couplers and fiber split couplers. They realize the transmission and coupling of optical signals through the physical docking between optical fibers, the splitting and combining of optical waves.

2. Radio frequency couplers: Radio frequency couplers are used to transmit radio frequency signals from one antenna to another, such as coaxial couplers, waveguide couplers, etc. They typically utilize a shared electromagnetic field or medium for signal transmission and coupling.

3. Transformer coupler: Transformer coupler is a device that realizes signal coupling through magnetic coupling principle. It is composed of at least two windings (usually an input winding and an output winding), and the signal is transmitted from the input winding to the output winding in the form of electromagnetic induction through the magnetic field interaction between the windings.

4. Capacitive couplers: Capacitive couplers use capacitors to couple and transmit signals. It transmits signals between input and output through the electric field interaction between the two plates of the capacitor.

The structure and principle of these couplers are diverse, but what they have in common is the transmission and coupling of signals or energy through physical structures or electrical characteristics. The specific structure and principle may vary in different coupler types and applications.

The main function of the coupler

The main function of the coupler is to realize the transmission and coupling of signals (such as electrical signals, optical signals, etc.) or energy. The following are the main functions of the coupler:

1. Signal transmission coupling: A coupler can transmit signals from one circuit, device, or system to another circuit, device, or system. This is useful for enabling remote transmission, sharing, or forwarding of signals to other devices or systems.

2. Signal matching and adaptation: The coupler can match or adapt the impedance, frequency characteristics, etc. between different circuits or systems to ensure the matching of signal transmission and reception. This helps to optimize the transmission efficiency and quality of the signal.

3. Signal distribution and splitting: Some couplers, such as fiber optic splitters or splitters, can distribute an input signal into multiple output signals, or combine multiple input signals into a single output signal. This has a wide range of applications in optical communication, optical sensing and other fields.

4. Electrical isolation: Some couplers are designed to have electrical isolation function, which can isolate the electrical connection or potential difference between the input and output circuits. This isolation can provide electrical safety against interference and noise as the signal propagates.

5. Energy transfer coupling: A coupler can be used to transfer energy from one circuit, device, or system to another circuit, device, or system. For example, the energy coupler in the wireless charger can transmit energy from the transmitting end to the receiving end to implement wireless charging.

In general, the main function of the coupler is to achieve signal or energy transmission, coupling, matching and adaptation, while providing electrical isolation, to meet the needs of signal transmission in different application scenarios, and to optimize the efficiency and quality of signal transmission.