Knowles ADP12054 Surface-Mount Diplexer

Introduction

The Dielectric Laboratories / Knowles ADP12054 is a compact surface-mount diplexer for high-frequency SATCOM and microwave signal-routing designs. It separates or combines signals centered around 11.75 GHz and 19.25 GHz while supporting reliable operation in demanding environmental conditions.

Part Description

The ADP12054 is a 50 Ω RF diplexer designed to manage two distinct frequency bands through a common RF connection. Its dual-band configuration makes it useful where transmit and receive paths, or separate microwave channels, must share antenna or signal-chain hardware.

Built with low-loss, temperature-stable materials, the device helps maintain consistent RF behavior across its rated operating range of -55°C to +125°C. A shielded stainless-steel cover provides additional protection from external interference and supports use in compact, high-density microwave assemblies.

Key characteristics include:

• Surface-mount package for compact PCB integration
• SATCOM band centers of 11.75 GHz and 19.25 GHz
• 50 Ω system impedance
• Low-loss RF construction
• Temperature-stable materials
• Shielded stainless-steel cover
• Operating temperature range of -55°C to +125°C

Applications

Potential applications for the ADP12054 include:

• Satellite communication terminals
• Ku-band and Ka-band RF front ends
• Antenna feed networks
• Frequency-division duplexing systems
• Microwave transmit/receive modules
• Shared-antenna communication architectures
• High-frequency test and measurement equipment
• Point-to-point microwave communication systems
• Radar and sensing subsystems
• Compact RF signal-routing assemblies

Industries

Industries that may use this diplexer include:

• Satellite communications
• Aerospace and defense
• Telecommunications
• Space systems and ground stations
• Radar and electronic warfare
• Test and measurement
• Scientific research
• Industrial microwave equipment
• Transportation communications
• Unmanned aerial systems

Usage Ideas

1. Dual-Band SATCOM Terminal
   Use the ADP12054 to combine or separate 11.75 GHz and 19.25 GHz signal paths in a compact satellite terminal connected to a shared antenna assembly.

2. Microwave Test Fixture
   Integrate the diplexer into a laboratory fixture for evaluating separate high-frequency receiver and transmitter paths with a common RF port.

3. Aerospace RF Module
   Design a ruggedized RF front-end module for airborne or space-constrained equipment, using the device’s wide operating-temperature capability and shielded package.

Conclusion

The Knowles ADP12054 is a surface-mount diplexer suited to compact SATCOM and microwave systems requiring signal separation or combination around 11.75 GHz and 19.25 GHz. Its 50 Ω impedance, low-loss construction, shielding, and broad temperature range make it a practical passive component for demanding RF applications.