I. Product Features and Description

The primary function of a Surface Acoustic Wave Filter (also known as an SAW filter) is to filter out noise, aiming to eliminate unnecessary signals and interference to enhance reception quality, thereby achieving the filtration of specific signals. The principle of the SAW filter utilizes the piezoelectric properties of piezoelectric materials, where input and output transducers convert electrical signals of the input wave into mechanical energy. After processing, the mechanical energy is converted back into electrical signals to achieve the purpose of separating currents of different frequencies. This type of product can replace LC resonant circuits and is used for interstage coupling and filtering. The disadvantages of SAW filters are that their insertion loss is greater than that of LC resonant circuits, their bandwidth is relatively narrow, and their download speed is slower. However, they are simpler to install compared to traditional LC filters.

SAW filter parameters (frequency range: 30MHz--3GHz; bandwidth: 100KHz--200MHz), low insertion loss (≤2.0dB), surface-mount packaging (SMD1814, 2016, 3225, 3030, 3070, 3838; 5050; 7050; 1365, D11, F11, TO39), wide operating temperature range (-25℃--+60℃; storage temperature: -45℃--+85℃). The products offer good consistency, easier installation, smaller size, low cost, high device integration, and stable and reliable performance across the full temperature range, suitable for use in conditions from -55℃ to +85℃. They effectively suppress higher harmonics, mirror signals, transmission leakage signals, and various parasitic clutter interference, and can achieve filtering with any required precision in amplitude-frequency and phase-frequency characteristics.

II. Product Models and Parameters

III. Precautions and Applications

    Surface Acoustic Wave Filters (abbreviated as SAWF or SAW, also known as SAW filters) are simpler to install and have a smaller size, making them widely used in various wireless communication systems, televisions, and other RF circuits. When in use, the input/output ports are interchangeable, but it is important to ensure that the ground terminal is properly grounded; otherwise, it may affect out-of-band suppression and flatness indicators. During soldering, use the recommended temperature and avoid excessively high temperatures or prolonged soldering times. If reflow soldering is used, it is recommended to follow the recommended temperature; wave soldering is not advisable. Products should be stored in a warehouse with an ambient temperature of -10℃ to 40℃, relative humidity not exceeding 80%, and free from acidic, alkaline, or other harmful gases. During cleaning, immersion is prohibited; it is recommended to wipe with alcohol.

     Xianfeng Microwave offers a variety of package types of SAW filters (abbreviated as SAW resonators) for users to choose from, with flexible design and support for customization (input/output forms and external dimensions can be designed according to user requirements). Custom SAW filters such as R315, R320, R433, R434, and SAW filters of various frequencies are available.