Knowles Dielectric Labs B165LA1S bandpass filter – LOT OF 20

Product Description

Knowles Dielectric Laboratories B165LA1S – High-Performance RF/Microwave Bandpass Filter

A precision-engineered ceramic bandpass filter from Knowles Dielectric Laboratories (DLI) , a leading manufacturer of high-performance RF/microwave components for defense, aerospace, telecommunications, and test instrumentation. The B165LA1S is a surface-mount, multilayer ceramic filter designed for selective frequency transmission with low insertion loss and high rejection in a compact, rugged package.

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🔍 Key Specifications & Details:

📡 Device Type:

• Manufacturer: Knowles Dielectric Laboratories (DLI)

• Part Number: B165LA1S

• Function: Bandpass filter – precision frequency selection

• Technology: Multilayer ceramic – stable, temperature-compensated dielectric

• Mounting: Surface-mount (SMT) – compact, low-profile package

📊 Typical Performance (DLI B-Series Family):

• Center Frequency (Fc): ~[Specific frequency unknown – consult DLI datasheet]

• Bandwidth: Narrowband to moderate fractional bandwidth

• Insertion Loss: Low – typically <2–3 dB in passband

• Rejection: High attenuation in stopbands

• Return Loss: >15 dB typical in passband

• Impedance: 50 Ω (designed for RF systems)

🔧 Construction & Environment:

• Package: Monolithic ceramic body with metallized terminations

• Temperature Stability: Excellent – low drift over -55°C to +125°C

• Reliability: Rugged, hermetic-equivalent construction

• Compliance: RoHS (typical for DLI components)

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🛠️ Potential Applications:

📶 Wireless & Telecommunications:

• Base station infrastructure – channel selection, interference rejection

• Microwave backhaul – frequency band isolation

• Satellite communications – transponder filtering

🛰️ Defense & Aerospace:

• Radar systems – receiver protection, harmonic filtering

• Electronic warfare (EW) – signal discrimination

• Secure communications – band-limited transmission

🔬 Test & Measurement:

• Spectrum analysis – pre-selection filtering

• Signal generators – harmonic suppression

• Component characterization – test fixture integration

📡 RF/Microwave Subsystems:

• Transmitter/receiver front-ends – image rejection, spurious suppression

• Frequency converters – mixer output filtering

• Amplifier chains – oscillation prevention

🧪 Research & Development:

• Prototyping – evaluate DLI ceramic filter performance

• Reverse engineering – characterize unknown S-parameters

• Educational labs – study microwave filter design and measurement