Tunable Filter Products

K&L Microwave offers a variety of Tunable Filter Products to satisfy a broad range of filtering applications. Tunable Bandpass and Bandreject filters provide the best solution for pre-tuning the desired signals while rejecting the interfering signals. The method of tuning can be either mechanical via a tuning knob mounted on the front of the filter, or electro-mechanical via an optional remote digital interface such as GPIB, RS-232, RS-422 or BCD. Digitally-Controlled Tunable Filter Products have a separate product section on this site. Mechanically tuned filters are shown below.

Tunable filters can be offered to cover frequencies as low as 800KHz, or as high as 18GHz. K&L Microwave offers Tunable Filters from stock, which cover many popular frequencies for applications such as military communications and wireless bands. Depending on the specific application, the tuning ranges can exceed an octave.

BT Series - 1% Bandwidth Tunable Bandpass Filters

Product

Three Frequency Range Options (See Data Sheet)
Manual Selection (Digitally-Controlled Versions Available)
Direct-Readout Center Frequency Dial
5-Section, Chebyshev Filter Response
AVAILABLE FROM STOCK

BT Series - 5% Bandwidth Tunable Bandpass Filters

Product

Fourteen Frequency Range Options (See Data Sheet)
Manual Selection (Digitally-Controlled Versions Available)
Direct-Readout Center Frequency Dial
5-Section, Chebyshev Filter Response
AVAILABLE FROM STOCK

CATV Filtering Solutions - CATV Frequency Pre-Selector Filter Sets

Product

Designed specifically to enhance frequency select ability
for Proof of Performance tests
Available to Cover 48 to 750 MHz or 55 to 880 MHz
Supplied in a protective, water-resistant field pack

Tunable Bandreject - Cellular/PCS/UMTS Tunable Bandreject

Product

Super Narrow 3 dB BW / Digitally Controlled
Remote Interface Options Include
GPIB (IEEE-488), RS-232, RS-422, and BCD
Drive Voltages Include 12 VDC, 24 VDC, and 110 VAC
Manually Controlled Versions also Available

TNF Series - Tunable Bandreject (Notch) Filters (Stocked)

Product

Ten Frequency Range Options (See Data Sheet)
Manual Selection (Digitally-Controlled Versions Available)
Direct-Readout Center Frequency Dial
Greater than 45 dB Attenuation Typical
AVAILABLE FROM STOCK

TNF Series - 3TNF-3000/4000-N/N - Tunable Bandreject Filter

Product

Tuning Range: 3000 to 4000 MHz
3dB Bandwidth: Approx. 1% of Tuned Center Frequency
Notch Depth: 40 dB minimum
Manual and Digitally Controlled Versions
Designed for Lab Use and Test Applications

5WZ02-10700/11700-E24-O/O/V - 11 GHz Tunable Diplexer

Product

This custom waveguide tunable diplexer for the
point-to-point radio market maintains a constant
bandwidth over the 10.7 to 11.7 GHz band with
1.5 dB insertion loss and 85 dB Tx/Rx isolation.

IT5C50-10700/11700-E24-O/O - 11 GHz Tunable Bandpass

Product

This custom waveguide tunable bandpass filter
maintains a constant bandwidth of 24 MHz
with minimal insertion loss degradation
over a 1 GHz band.