I. Product Features and Description

    The function of a balun is to achieve the conversion between balanced and unbalanced signals. The input and output ports (50Ω) of most radio station antennas are unbalanced. Baluns are mainly used in interfaces between differential and single-ended signals, impedance matching, improving circuit anti-interference capability, suppressing higher-order harmonics, and acting as common-mode rejection. In different applications, baluns may require zero isolation or high isolation. The impedance ratio of a balun refers to the ratio of the unbalanced port impedance to the balanced port impedance, and different loads may require different impedance ratios. Baluns also have insertion loss and return loss parameters. Insertion loss and return loss respectively indicate how much energy passes through the balun and how much is reflected by the balun at the port, and such losses vary with frequency.

   LTCC baluns (also known as balancers or impedance converters), in addition to the advantages of miniaturization, integration, and more flexible design features, also offer benefits such as high gain, low insertion loss, resistance to electromagnetic interference, resistance to power supply noise, high resistance to ground noise, suppression of even-order harmonics, and advantages of various impedance conversion series. The products have good consistency and sealing, effectively preventing moisture, further miniaturizing and increasing the density of circuits, making them particularly suitable for high-frequency communication components. This type of product generally uses SMD packaging. In RF circuits and low-frequency circuits, the use of baluns (also known as balancers or impedance converters) is becoming increasingly widespread, and their importance is growing day by day.

II. Product Models and Parameters

III. Precautions and Applications

    Baluns are commonly used in radio stations, baseband video, radar, transmitters, satellites, routers, and modern communication systems such as mobile communication and data transmission networks. When using them, ensure that the grounding terminal is properly grounded; otherwise, it may affect out-of-band suppression and flatness indicators. During soldering, the temperature should not be too high, and the time should not be too long. It is recommended to use the recommended temperature. Wave soldering is not suitable. Products should be stored in a warehouse with an ambient temperature of -10°C to 40°C, relative humidity not exceeding 80%, and free of acidic, alkaline, or other harmful gases. It is recommended to clean with alcohol.

   Xianfeng Microwave can customize LTCC baluns (LTCC balancers). Users requesting customized LTCC baluns must provide reasonable requirements. This type of product is highly customizable, and once produced, it cannot be modified.