Coaxial Locking Terminator is a key component used in RF and microwave systems to terminate unused ports or prevent signal reflections. It ensures impedance matching in the system, thereby reducing signal reflections, improving system performance, and protecting sensitive equipment from potential damage. The following is key information about coaxial locking terminals, recommended brands and models, and how to choose the right terminal.

　　1. Overview of Coaxial Locking Terminator

　　1.1 Definition

　　Definition: A coaxial locking terminal is a device installed at the end of a coaxial cable to provide a known and stable load impedance (usually 50Ω or 75Ω) to absorb any signal reaching that point and prevent it from reflecting back to the source.

　　1.2 Main Functions

　　Impedance matching: Ensure that all components in the system have the same characteristic impedance to avoid signal reflections caused by impedance mismatch.

　　Signal absorption: Effectively absorb signal energy to prevent reflected signals from interfering with the operation of other parts.

　　Protect equipment: Protect transmitters and other sensitive equipment from reflected power by providing a stable load.

　　2. Key Features

　　2.1 Impedance Value

　　50Ω: Widely used in most RF and microwave communication systems.

　　75Ω: Common in video transmission and some broadcast applications.

　　2.2 Frequency Range

　　Supports applications from DC to several GHz or even higher frequencies, depending on the manufacturer and model.

　　2.3 Power Handling Capability

　　Specifies the maximum input signal power that the terminal can withstand to ensure that it will not be damaged due to overload. Especially important for high-power applications.

　　2.4 Temperature Stability

　　The ability to maintain constant performance under different temperature conditions is very important for applications in outdoor or extreme environments.

　　2.5 Insertion Loss

　　Describes the energy loss when the signal passes through the terminal. The lower the better to reduce the impact on signal strength.

　　2.6 Connector Type

　　Common connector types include N-type, BNC, SMA, TNC, etc. to ensure compatibility with existing systems.

　　3. Recommended Brands and Models

　　The following are some well-known coaxial locking terminal manufacturers and their products:

　　Mini-Circuits

　　Provides a variety of types of locking terminals for various frequency ranges and power levels. For example:

　　ATC-50A+: 50Ω N-type connector, supports wideband operation, suitable for general use.

　　ATC-75A+: 75Ω F-type connector, designed for video applications.

　　Pasternack

　　Provides plug-and-play locking terminal solutions for rapid prototyping and low-volume production. For example:

　　PE18091: 50Ω SMA male locking terminal, supports frequency range up to 18 GHz.

　　Fairview Microwave

　　Provides high-performance locking terminals, especially suitable for high-frequency and broadband applications. For example:

　　FV010050: 50Ω N-type female locking terminal, suitable for a wide range of RF applications.

　　Amphenol RF

　　Provides compact locking terminals for space-constrained designs. For example:

　　RJ41-SMA: 50Ω SMA female locking terminal, with good mechanical strength and electrical performance.

　　Anaren (Laird Connectivity)

　　Provides customization services to help customers develop the most suitable configuration according to specific needs. For example:

　　CTT Series: A series of compact 50Ω SMA locking terminals suitable for portable devices.

　　4. Purchase channels

　　4.1 Online retailers

　　Digi-Key Electronics

　　Well-known electronic product distributor, providing multiple brands of locking terminals and professional consultation.

　　Mouser Electronics

　　Provides a wide range of electronic components and technical solutions, including various RF modules and passive devices.

　　4.2 Contact the manufacturer directly

　　Official website

　　Visit the manufacturer's official website to purchase or inquire directly, get the latest product information and technical support.

　　5. Selection guide

　　Determine the needs

　　Application scenario: Identify the specific usage scenario, such as whether it is for laboratory testing, field installation or other specific purposes.

　　Frequency and supported technology: Select the appropriate terminal type based on the specific frequency range required to be supported.

　　Technical requirements

　　Performance indicators: Evaluate key performance parameters such as impedance value, frequency range, insertion loss, etc.

　　Environmental adaptability: Ensure that the selected terminal can operate reliably in the expected working environment, including temperature changes, humidity and other external factors.

　　Cost-effectiveness

　　Budget considerations: Select the most cost-effective terminal products according to the project budget, while ensuring that the necessary performance or quality standards are not sacrificed.

　　Regulatory compliance

　　Certification and standards: Confirm that the selected terminal complies with relevant industry standards and regulatory requirements of the country or region, such as CE, FCC, etc.

　　Supplier support and services

　　Technical support: Select suppliers with good reputation and technical support capabilities to ensure the reliability of after-sales service.

　　Customized services: Some suppliers may provide customized solutions to help customers develop the most suitable configuration according to specific needs.

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