Here just list out part of catalogs as follows for reference. Customized products are available, please consult with Kete.

Part Number	Pass Band	Attenuation Min.	Insertion Loss Max.	VSWR  Max.
KTF-250-LP	DC-0.5GHz	40dB@0.6-0.9GHz	2.0dB	1.8 : 1
KTF-500-LP	DC-1.0GHz	60dB@1.23-8GHz	1.5dB	1.8: 1
KTF-625-LP	DC-1.25GHz	50dB@1.56-3.3GHz	1.0dB	1.5: 1
KTF-700-LP	DC-1.40GHz	40dB@@1.484-11GHz	2.0dB	2 : 1
KTF-800-LP	DC-1.60GHz	40dB@@1.696-11GHz	2.0dB	2 : 1
KTF-1000-LP	DC-2.00GHz	50dB@2.6-6GHz	1.0dB	1.5: 1
KTF-1100-LP	DC-2.2GHz	60dB@2.650-7GHz	1.5dB	1.5: 1
KTF-1350-LP	DC-2.7GHz	50dB@4-8GHz	1.5dB	1.5: 1
KTF-1485-LP	DC-2.97GHz	50dB@3.96-9.9GHz	1.0dB	1.5: 1
KTF-2100-LP	DC-4.2GHz	40dB@4.452-21GHz	2.0dB	2 : 1
KTF2250-LP	DC-4.5GHz	50dB@@6.0-16GHz	2.0dB	2 : 1
KTF-2575-LP	DC-5.150GHz	50dB@@6.0-16GHz	2.0dB	2 : 1
KTF-2900-LP	DC-5.8GHz	40dB@@6.148-18GHz	2.0dB	2 : 1
KTF-3000-LP	DC-6.0GHz	70dB@@9.0-18GHz	2.0dB	2 : 1
KTF-4000-LP	DC-8.0GHz	25dB@9.6GHz,55dB@15GHz	0.35dB	1.5 : 1
KTF-6000-LP	DC-12.0GHz	25dB@14.4GHz,55dB@18GHz	≤0.4dB	1.7: 1
KTF-6800-LP	DC-13.6GHz	25dB@22GHz,40dB@25.5-40GHz	0.8dB	1.5: 1
KTF-9000-LP	DC-18.0GHz	25dB@21.6GHz,50dB@24.3GHz	0.6dB	1.8: 1
KTF-11800-LP	DC-23.6GHz	≥25dB@27.7GHz , ≥40dB@33GHz	1.3dB	1.7: 1

Low pass filter has a direct connection from input to output, passing DC and all frequencies below some specified 3 dB cutoff frequency. After the 3 dB cutoff frequency the insertion loss increases dramatically and the filter (ideally) rejects all frequencies above this point. Physically realizable filters have ‘re-entry’ modes that limit the high frequency capability of the filter. At some higher frequency the rejection of the filter degrades, and higher frequency signals can appear at the output of the filter.

Applications of Low Pass Filters
• Low pass filters are used in radio receivers to avoid high-frequency interference
• In RF test laboratories, low pass filters are used to construct complex test setups
• Cut off high-frequency components in any system above its operating frequency range
• In RF transceivers, LPFs are used to significantly improve the low-frequency selectivity and signal quality