Shenzhen Nordson Bo Communication Co., LTD

Home >  other information > 

rf power splitter combiner

Time:2024-12-26 Views:1

  RF power splitters and combiners are key passive components used for signal distribution and combination in radio frequency (RF) systems. They are widely used in wireless communications, radar, test equipment, and other applications that require precise control of signal distribution and combination. RF power splitters split one input signal into multiple output signals, while RF power combiners do the opposite, combining multiple input signals into one output signal. In practical applications, these two functions are often integrated into the same device, the so-called "splitter-combiner", to achieve bidirectional operation.

  Main types of RF power splitters/combiners

  Wilkinson Power Divider/Combiner:

  Features: High isolation, low insertion loss and good phase matching.

  Structure: Consists of two equal impedance branches, each branch is connected to a quarter-wave matching resistor to absorb unbalanced signals and ensure high isolation between ports.

  Application: Suitable for applications requiring high isolation and low intermodulation distortion, such as multi-channel receivers or transmitters.

  Branchline Coupler:

  Features: Provides 90-degree phase shift, suitable for applications such as orthogonal modulation and demodulation.

  Structure: Power distribution or combination is achieved at the intersection through two mutually perpendicular transmission lines.

  Application: Commonly used in applications that require a specific phase relationship.

  Circulator:

  Features: Unidirectional transmission characteristics, the signal can only be transmitted from one port to the next port in a predetermined direction.

  Structure: Usually has three or four ports, using non-reciprocal materials (such as yttrium iron garnet YIG) to achieve unidirectionality.

  Application: Used as an isolator to protect amplifiers from reflections, or to build a duplexer.

  Magic-T:

  Features: Combining the advantages of E-plane and H-plane T-type connectors, it can effectively merge signals from different directions without generating reflections.

  Structure: Suitable for power synthesis and signal separation in waveguide systems.

  Microstrip Power Dividers/Combiners:

  Features: Miniaturized design, easy to integrate into PCB.

  Structure: Made using microstrip technology on printed circuit boards, can be designed in the form of λ/4 transformers, star networks, etc.

  Applications: Suitable for applications that require compact size and low-cost solutions.

  Hybrid Couplers:

  Features: In addition to power distribution, it can also be used to monitor signal levels.

  Structure: For example, a 3 dB bridge can evenly divide power while maintaining a certain phase difference.

  Design Considerations

  Frequency Range: Select products that meet the operating frequency range to ensure stable performance throughout the frequency band.

  Insertion Loss: Minimize insertion loss to maintain high signal strength.

  Isolation: For multi-port devices, high isolation helps reduce interference between different signals.

  Phase consistency: In some applications, such as phased array antenna systems, a strictly consistent phase relationship needs to be maintained.

  Power Handling Capability: Select the appropriate model according to the maximum expected power level, especially in transmitter applications.

  Environmental adaptability: Equipment used outdoors should have a good level of protection, such as waterproof and dustproof.

  Manufacturing process

  The production of RF power dividers/combiners involves precise microwave engineering technology and material science. Common manufacturing processes include:

  Microstrip and stripline technology: used to build efficient miniaturized power distribution/combining circuits.

  Surface mount technology (SMT): suitable for mass production and automated assembly.

  Ceramic substrates and metal shielding: provide excellent electrical performance and mechanical stability.

  Welding and brazing: ensure a strong and reliable electrical connection between components.

  Testing and calibration: The finished product must undergo rigorous testing to ensure that it meets the specifications and is adjusted to the best performance during the calibration process.

raditek isolator

Read recommendations:

high power rf combiner

dual band omni directional antenna

wilkinson combiner

dual band omni antenna

rf isolators and circulators

Contact

0755-26701085 / 0755-26701002

Contact

sales@nxbtech.com / tangym@nxbtech.com

Contact Contact