Knowles Dielectric Labs B140MB4S 14.0 GHz Surface-Mount Bandpass Filter

Introduction

The Knowles Dielectric Labs B140MB4S is a compact surface-mount bandpass filter designed for high-frequency RF and microwave signal paths. Centered around the 14 GHz region, it helps pass desired signals within its specified band while reducing unwanted frequencies outside that range.

Part Description

The B140MB4S is a 50-ohm surface-mount bandpass filter with an operating frequency range of 13.75 GHz to 14.5 GHz. Its narrow high-frequency passband makes it suitable for systems that need selective filtering around 14 GHz.

Designed for challenging electronic environments, the filter supports an operating temperature range of -55 °C to +125 °C. Its surface-mount format can support compact PCB-based RF assemblies, including communications equipment, test hardware, and microwave subsystems.

Key characteristics include:

• Product type: Bandpass filter
• Frequency range: 13.75 GHz to 14.5 GHz
• Nominal operating region: 14.0 GHz
• Impedance: 50 ohms
• Mounting style: Surface mount
• Operating temperature: -55 °C to +125 °C
• Manufacturer: Knowles Dielectric Labs

Applications

Potential applications for the B140MB4S include:

• Ku-band RF receiver front ends
• Satellite communications equipment
• Microwave transceivers
• High-frequency radar signal chains
• RF test and measurement instruments
• Frequency-selective receiver modules
• Point-to-point microwave communication links
• Signal conditioning circuits for 14 GHz systems
• RF laboratory prototypes and evaluation boards

Industries

Industries that may use this type of filter include:

• Satellite communications
• Aerospace and defense
• Telecommunications
• Radar and sensing
• Test and measurement
• Scientific research
• Industrial wireless systems
• RF and microwave equipment manufacturing

Usage Ideas

1. Ku-Band Receiver Filter Board
   Build a compact receiver front-end board that places the B140MB4S between a low-noise amplifier and mixer to select signals in the 13.75 GHz to 14.5 GHz range.

2. 14 GHz Test Signal Conditioner
   Create a microwave test fixture using the filter to clean up a 14 GHz signal source before it is supplied to measurement equipment or a device under test.

3. Satellite Communications Module Prototype
   Use the filter in a prototype Ku-band communications module to help isolate the desired receive or transmit channel from adjacent-frequency interference.

Conclusion

The Knowles Dielectric Labs B140MB4S is a surface-mount 14 GHz bandpass filter intended for selective RF filtering in demanding microwave designs. With a 13.75 GHz to 14.5 GHz passband, 50-ohm impedance, and wide operating temperature range, it is well suited to compact Ku-band communications, radar, aerospace, and test-system applications.