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K&L Microwave provides lowpass filters in multiple topologies built to customers' electrical, mechanical, and environmental specifications. The list below contains part numbers meeting existing industry and customer specifications, as well as product families. Use the quote cart to request a quote on a specific design. When considering a particular family of parts, use Filter Wizard (a link button will be provided when appropriate) to determine a specific part number within the given family.
TTC Series - Transition Time Converters (TTC)
Designed Specifically for High Speed Digital Networks
Covers the 10 MHz to 20 GHz Frequency Range
Minimum Ringing / Overshoot
Minimizes Inter-Symbol Interference
Broad Band VSWR Available
FC Series - Filter in Connector
Custom Solutions for Bandpass, Lowpass, Highpass,
and Notch Responses
Compact and Rigid - Filter Resides in an SMA Adaptor
External to Electronic Equipment and Easily Maintained
Power Handling 10 Watts CW
IL Series - Lumped Component Microminiature Lowpass
Covers the 10 MHz to 6 GHz Frequency Range
Designs Available in 2-10 sections
0.05 dB Chebyshev Design Response
Small, Compact Package / Ruggedized Package Design
L Series - Tubular Lowpass Filters
2-8 Sections / 40 MHz to 20000 MHz
Economical Design Yields High Performance Results
0.05 dB Chebychev Design
Ruggedized Package Designs / See Dimensions
Use Filter Wizard for L Series
L Series - Clean-Up Filters (6L250 Family)
Quarter-Inch Diameter Tubular Lowpass Filters
Clean-Up Filters, Ranging from 2 GHz to 12 GHz Cut-Off
Part numbers 6L250-00084, 6L250-00085, 6L250-00086,
6L250-00088, and 6L250-00089.
LL Series - Lumped Component Miniature Lowpass
Covers the 0.1 MHz to 2500 MHz Frequency Range
Designs Available in 2-10 Sections
Low Insertion Loss / 0.05 dB Chebyshev Response
Small, Ruggedized Package
LL Series - 6LL10-400/X1200-N/NP
Type N Connectors
Shape Factor 1.03:1
Ultimate Rejection
Low Loss
LL Series - High Power Lumped Element Filter
K&L Microwave has developed a series of high power lumped element filters featuring small size and power handling in excess of 1 kilowatt. The proprietary design maximizes heat dissipation and is "ruggedized" for harsh environments. High power lumped component filters are available in custom lowpass, highpass, bandpass, and notch configurations.
SL Series - Suspended Substrate Lowpass
Covers 2 GHz to 18 GHz Frequency Range
Excellent Environmental Performance
Ruggedized Package Design
Custom Designs Available
SL Series - 11SL10-11000/T17500-O/O
3.0 dB Cutoff: 11 GHz
Insertion Loss: <1.0 dB @ DC to 10 GHz
VSWR: 1.7:1 @ Typical
Rejection: >55 dB @ 12.7 to 17.5 GHz
Dimensions: 1.0" x 0.7" x 0.5" less SMA Female Connectors
SL Series - 11SL10-18000/X24000-O/O
Suspended Substrate Lowpass
Insertion Loss: <2.0 dB @ DC to 18 GHz
VSWR: 2.0:1 @ Typical
Rejection" >40 dB @ 21 to 24 GHz
Dimensions: 0.85" x 0.6" x 0.5" less SMA Female Connectors
4KCL70-512/U8500 - Reduced Size Surface Mount Lowpass
1 dB cutoff 512 MHz
IL 1.5 dB max, VSWR 2.0:1 from 100 to 512 MHz
Attenuation 50 dB min 920 to 3000 MHz
Approximate Size 0.5”L x 0.16”W x .0.14”H
Available in lowpass, highpass, and bandpass
SL Series - 11SL10-2000/U6000-O/O
Insertion Loss: <1dB @ DC to 2000 MHz
VSWR: 1.5:1 @ DC to 2000 MHz
Stopbands: >50 dB @ 2300 MHz
Dimensions: 2" x 1.5" x 0.5"
4KCB70-90/512 - 4 Band Lowpass Filter
Leaded Surface Mount Package
20 Watts CW Power
Absorptive Input
Applications: Broadcasting and Aeronautical Navigation
7PLL-18000/30000 - 18 GHz Lowpass Filter
Connectors Not Required
Extremely Small Size and Low Weight
No Tuning Required
Meets Full MIL-STD-202 and 810 Requirements
7WZ/C/L/P-22400/E2400-V/V - 21 GHz Antenna Lowpass
This custom waveguide product is a 21-23 GHz
antenna connection with a harmonic rejection
lowpass, a 90 degree twist, and a circulator for
Tx/Rx isolation.
Harmonic Suppression Lowpass - Highpower Harmonic Suppression
Covers Frequency Range from DC and 1500 MHz
Rated Power Levels 1500 W Average/30,000 W Peak
Typical Passband Loss Achieving 0.1 to 0.15 dB
Typical 3 dB Cutoff Between 450 and 1600 MHz
3-8 Sections / Low Passband VSWR
High Power Lowpass - Lumped Component High-Power Lowpass
Clean-up filter from FM band transmitter
Low Loss
Power: 1250 W Continuous
Excellent VSWR
