Antenna Splitter and Antenna Combiner are passive devices used for radio frequency (RF) signal distribution and combination, and are widely used in wireless communication systems. They allow one antenna to be connected to multiple receiving or transmitting devices, or vice versa, multiple antennas to be connected to one receiving or transmitting device.

　　Antenna Splitter

　　Function:

　　Power distribution: Distribute the signal from one input port equally to two or more output ports.

　　Isolation: Ensure high isolation between the output ports to avoid mutual interference between different receivers.

　　Low insertion loss: Minimize the attenuation of the signal when passing through the splitter and maintain the signal strength.

　　Application scenarios:

　　Used to distribute the signal from a single antenna to multiple receiving devices, such as distributing the satellite antenna signal to multiple TVs in a home environment.

　　In test and measurement, when different characteristics of the same signal need to be monitored simultaneously.

　　Antenna Combiner

　　Function:

　　Power synthesis: Combines signals from multiple input ports into one output signal, usually used to safely feed signals from multiple transmitters to the same antenna.

　　Matching network: Ensures impedance matching at each input port to optimize transmission efficiency and reduce reflections.

　　Isolation: Prevents unnecessary coupling or interference between input signals.

　　Application scenarios:

　　In base stations, multiple transmitter signals in different frequency bands are combined into one antenna to save space and cost.

　　In mobile communication devices, such as mobile phones and tablets, combiners may be used to integrate signals from Wi-Fi, Bluetooth and other wireless technologies.

　　Design considerations

　　Frequency range: Select products suitable for the frequency range of specific applications to ensure good performance.

　　Insertion loss: Try to choose products with low insertion loss to maintain high signal strength.

　　Isolation: For combiners, high isolation can effectively reduce interference between different signals.

　　Power handling capability: Select the appropriate model according to the maximum power level actually used, especially in transmitter applications.

　　Physical size and mounting method: Consider the space constraints of the installation location and whether it is easy to integrate into the existing system.

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

　　Manufacturing process

　　The production of antenna splitters and combiners involves precise microwave engineering technology and material science. Common manufacturing processes include:

　　Microstrip and stripline technology: used to build miniaturized and efficient splitter/combiner circuits.

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

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

　　Welding and brazing: ensure strong and reliable electrical connections 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.

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