K&L

Company Profile:

K&L Microwave, founded in 1970 and headquartered in Salisbury, Maryland, USA, became part of the Dover Corporation in 1983 and operates as a key member of its technology portfolio. For over four decades, K&L has specialized in the R&D and production of passive-filter-centric RF/microwave communication components. The company offers a comprehensive range of filters, including ​ceramic, ​tunable bandpass/bandstop, ​lumped-element (LC), ​cavity, ​suspended stripline, and ​tubular filters, as well as ​duplexers and ​microwave subsystems. K&L is a recognized industry leader in precision filtering solutions.

Key Products:

1. ​Ceramic Filters

   • ​Low insertion loss with high-Q rejection
   • ​Operating temperature: -40°C to +85°C
   • ​Frequency range: 270 MHz – 3000 MHz
   • ​Passband bandwidth: 0.2% – 30% (center frequency)
   • ​Chebyshev response design
   • ​Shock resistance: 20G’s, ½ sine, 11 ms
   • ​Vibration resistance: 10G’s, 10 Hz – 2000 Hz
   • ​Housing configurations: DR23, DR33, DR25, DR35

2. ​Tunable Bandpass/Bandstop Filters
   K&L Microwave supplies tunable filters for diverse filtering applications. Its ​tunable bandpass and ​tunable bandreject (notch) filters provide optimal solutions for eliminating interference signals in preset frequency ranges.

   ​Frequency tuning is achieved via mechanical adjustment (front-panel knobs) or optional digital interfaces (e.g., GPIB, RS-232, RS-422, BCD).

   ​Key Specifications:

   • ​Filter types: Bandpass, Bandstop
   • ​Frequency range: 1.5 MHz – 4 GHz
   • ​Power handling: 50 W (CW)
   • ​Tuning range: Exceeding one octave
   • ​Applications: Commercial/military communication equipment testing

   ​Product Topologies:

   • Bandpass filters
   • Duplexers and diplexers
   • Multiplexers