The B38861-W1901-W310-W71 is a SAW (Surface Acoustic Wave) filter manufactured by TDK Corporation. These filters are widely used in radio frequency (RF) applications to selectively pass or reject specific frequencies, ensuring clear signal transmission and reception.

Applications:

• Mobile Communication Devices: Used in smartphones, tablets, and other mobile devices for filtering RF signals in cellular bands (e.g., GSM, UMTS, LTE).
• Wireless Communication Systems: Employed in base stations, repeaters, and other wireless infrastructure equipment to enhance signal quality.
• Navigation Systems: Found in GPS and other navigation devices for filtering signals from satellites.
• Automotive Applications: Utilized in car navigation systems, remote keyless entry systems, and other automotive communication systems.
• Television Broadcasting: Used in set-top boxes and television receivers to filter unwanted signals and enhance the quality of received TV signals.

Features:

• High Selectivity: Provides excellent rejection of unwanted signals outside the desired frequency band.
• Low Insertion Loss: Minimizes signal attenuation within the passband, ensuring efficient signal transmission.
• Small Size: Compact design allows for integration into small electronic devices.
• High Stability: Offers stable performance over a wide range of temperatures and operating conditions.
• Surface Mount Technology (SMT): Designed for easy and efficient assembly on printed circuit boards (PCBs).

Benefits:

• Improved Signal Quality: Ensures clear and reliable communication by filtering out interference and noise.
• Enhanced Device Performance: Enables optimal performance of wireless devices by selecting the desired frequency bands.
• Reduced Interference: Minimizes the impact of unwanted signals on sensitive electronic components.
• Compact Design: Allows for smaller and lighter electronic devices.
• Cost-Effective Solution: Provides a reliable and efficient filtering solution at a competitive price.

Additional Details:

SAW filters like the B38861-W1901-W310-W71 use piezoelectric materials to convert electrical signals into mechanical waves and back again. The filter's structure is designed to resonate at specific frequencies, allowing those frequencies to pass through while attenuating others. The specific frequency response of this filter is tailored to meet the requirements of particular applications. Consult the TDK datasheet for detailed electrical characteristics, mechanical dimensions, and environmental specifications to ensure proper implementation in your design.