Bourns FDP2009N122157H4 LTCC Diplexer

Introduction

The Bourns FDP2009N122157H4 is a compact LTCC diplexer intended for GNSS L-band RF systems. It helps separate or combine satellite-navigation frequency paths while maintaining a controlled 50 Ω RF interface.

Part Description

The FDP2009N122157H4 is a low-temperature co-fired ceramic (LTCC) diplexer designed to work with GNSS L1, L2, and L5 signal bands. A diplexer allows two RF frequency paths to share a common port, either splitting received signals into separate paths or combining signals for routing through a shared antenna or RF connection.

Key characteristics include:

• GNSS L-band support for L1, L2, and L5 frequency use
• 50 Ω nominal impedance
• Maximum power handling of 3 W
• Maximum insertion loss of 1.2 dB
• Minimum return loss of 10 dB
• Operating temperature range of -40°C to +105°C
• LTCC construction for compact, stable RF filtering performance

Its low insertion loss helps preserve weak satellite-navigation signals, while its temperature range supports equipment used in outdoor, industrial, automotive, and other demanding environments.

Applications

Potential applications for the FDP2009N122157H4 include:

• Multi-band GNSS receivers
• GNSS antenna front ends
• L1/L2/L5 satellite-navigation modules
• Precision positioning receivers
• RTK GNSS systems
• Vehicle navigation and telematics equipment
• Fleet-tracking devices
• Surveying and geospatial instruments
• Timing and synchronization receivers
• Unmanned aerial vehicle navigation systems
• Marine navigation electronics
• Portable navigation and positioning devices

Industries

Industries that may use this diplexer include:

• Automotive and transportation
• Aerospace and aviation
• Defense and security
• Telecommunications
• Industrial automation
• Geospatial surveying
• Agriculture and precision farming
• Marine electronics
• Robotics
• Logistics and fleet management
• Smart infrastructure
• Scientific instrumentation

Usage Ideas

1. Dual-Band GNSS Receiver Front End
   Use the diplexer to route separate L-band GNSS frequency groups between a shared antenna connection and dedicated receiver inputs.

2. RTK Surveying Device
   Integrate the component into a precision GNSS receiver to support multi-frequency positioning for surveying, mapping, or construction-layout equipment.

3. Autonomous Vehicle Navigation Module
   Include the diplexer in a GNSS front end for an agricultural robot, drone, or mobile autonomous platform requiring robust satellite positioning.

Conclusion

The Bourns FDP2009N122157H4 is an LTCC diplexer built for multi-band GNSS L-band applications. With 50 Ω impedance, low insertion loss, 3 W power capability, and operation from -40°C to +105°C, it is well suited to compact navigation, positioning, timing, and RF front-end designs that need to manage L1, L2, and L5 GNSS signals.