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Ang RF low pass filter ay isang signal processing filter na nagpapanatili ng mga low frequency signal sa pamamagitan ng pag-aalis ng mga high frequency signal. Pinapayagan nito ang mga signal na may mga frequency na mas mababa sa isang partikular na threshold na dumaan, ngunit tinatanggihan ang mga signal na may mga frequency na mas malaki sa threshold na iyon.
1. Tanging ang mga signal na mas mababa sa isang partikular na frequency ang pinapayagang dumaan, habang ang mga signal na mas mataas sa frequency na iyon ay sinasala o pinapahina.
2. Kapag dumadaan sa mga low-frequency signal, halos walang pagbabago sa phase.
3. Karaniwan, isa o higit pang mga capacitor at inductor ang ginagamit upang bumuo ng mga telecom low pass filter.
1. Makinis na signal
Ang high frequency low pass filter ay pangunahing ginagamit upang pakinisin ang signal, maaari nitong alisin ang ingay sa high-frequency signal, upang maging mas matatag ang signal. Sa mga kaso kung saan kinakailangan ang isang maayos na signal, maaaring alisin ng microstrip low pass filter ang ingay ng high-frequency interference, kaya ginagawang mas maaasahan at matatag ang sistema.
2. Pagbawas ng ingay
Hindi makakaapekto ang low pass filter sa low-frequency signal, habang pinapanatili ang low-frequency signal, maaaring i-filter ang high-frequency noise. Sa audio processing o image processing, maaaring i-filter ng low pass filter ang noise at gawing mas malinaw ang naprosesong signal.
3. Bawasan ang error
Nakakabawas ng error ang low pass filter, lalo na't angkop para sa pagsukat ng mga instrumentong may katumpakan. Sa ilang mahihirap na pagsukat, kayang alisin ng low pass filter ang ingay, interference, at iba pang mga salik, upang mas maging tumpak at maaasahan ang mga resulta ng pagsukat.
4. Malawak na hanay ng aplikasyon
Ang Millimeter wave low pass filter ay may napakalawak na hanay ng mga aplikasyon, mula sa audio hanggang sa imahe, mula sa komunikasyon hanggang sa kontrol, halos lahat ng dako. Halimbawa, sa pagpoproseso ng baseband signal, kinakailangan ang maliit na sukat ng low pass filter.
Sa komunikasyon, kayang salain ng suspended low pass filter ang high-frequency noise, interference, atbp., upang matiyak ang kalidad ng komunikasyon; Sa larangan ng kontrol, maaaring gamitin ang stripline low pass filter para sa pagpapakinis ng signal at pag-filter ng noise.
QualwaveNagbibigay ng mga microwave low pass filter sa frequency range na DC-50GHz. Ang mga waveguide low pass filter ay malawakang ginagamit sa maraming aplikasyon.

Numero ng Bahagi | Passband(GHz, Min.) | Passband(GHz, Max.) | Pagkawala ng Pagsingit(dB, Pinakamataas) | VSWR(Max.) | Pagpapahina ng Stopband(dB) | Mga Konektor |
|---|---|---|---|---|---|---|
| QLF-1-40 | DC | 0.001 | 1.5 | 1.5 | 40@2-4MHz, 50@4-100MHz | SMA |
| QLF-2-15-40 | 0.002 | 0.015 | 2.5 | 1.5 | 40@17-200MHz | SMA |
| QLF-2.5-50 | DC | 0.0025 | 0.8 | 1.5 | 50@5-50MHz | SMA |
| QLF-5-50 | DC | 0.005 | 1 | 1.5 | 50@8-50MHz | SMA |
| QLF-10-50 | DC | 0.01 | 1 | 1.5 | 50@13-150MHz | SMA |
| QLF-30-40 | DC | 0.03 | 1 | 1.5 | 40@45MHz, 60@60MHz | SMA |
| QLF-32-40 | DC | 0.032 | 0.8 | 1.5 | 40@50-90MHz | N |
| QLF-45-20 | DC | 0.045 | 1 | 1.7 | 20@0.07-0.09GHz | SMA |
| QLF-55-35 | DC | 0.055 | 0.8 | 1.5 | 35@0.07-0.2GHz | SMA |
| QLF-125-60 | DC | 0.125 | 2 | 1.5 | 60@0.15~0.6GHz | SMA |
| QLF-200-2400-60 | 0.2 | 2.4 | 5 | 1.5 | 60@3.6GHz | SMA |
| QLF-215-30 | DC | 0.215 | 0.6 | 1.4 | 30@0.35~1GHz | N |
| QLF-300-40 | DC | 0.3 | 1 | 1.5 | 40@450MHz, 60@600MHz | SMA |
| QLF-300-60 | DC | 0.3 | 0.5 | 1.5 | 60@0.643-3GHz | SMA |
| QLF-330-60 | DC | 0.33 | 0.5 | 1.3 | 60@0.643-3GHz | SMA |
| QLF-480-30 | DC | 0.48 | 3 | 1.5 | 30@0.53-3GHz | SMA |
| QLF-500-45 | DC | 0.5 | 1.5 | 1.8 | 45@0.6~1GHz | SMA |
| QLF-1000-30 | DC | 1 | 0.9 | 1.2 | 30@1.9-5GHz | SMA |
| QLF-1000-70 | DC | 1 | 1 | 1.5 | 70@1.3-4.2GHz | SMA |
| QLF-1100-60 | DC | 1.1 | 0.9 | 1.4 | 60@1.5~3GHz | SMA |
| QLF-1200-60 | DC | 1.2 | 1 | 1.5 | 60@1.8-8GHz | SMA |
| QLF-1400-50 | DC | 1.4 | 2 | 1.6 | Pinakamataas na 50@2GHz | SMA |
| QLF-2000-50 | DC | 2 | 1 | 1.5 | 50@2.3-4GHz, 40@4~7GHz | SMA |
| QLF-2186-30 | 1.5 | 2.186 | 2 | 1.6 | 30@2.37-3GHz | SMA |
| QLF-2200-30 | DC | 2.2 | 0.9 | 1.2(tipikal) | 30@3-5GHz | SMA |
| QLF-2250-30 | DC | 2.25 | 1.2 | 1.2(tipikal) | 30@3-5GHz | SMA |
| QLF-2250-60 | DC | 2.25 | 1.5 | 1.3 | 60@2.65~7.4GHz | SMA |
| QLF-2400-58 | DC | 2.4 | 2 | 1.7 | 58@3-18GHz | SMA |
| QLF-3000-30 | DC | 3 | 0.9 | 1.3(tipikal) | 30@4.78-7.5GHz | SMA |
| QLF-3000-60 | DC | 3 | 1.5 | 1.3 | 60@3.52~10GHz | SMA |
| QLF-3200-40 | DC | 3.2 | 1 | 1.5 | 40@3.8-18GHz | SMA |
| QLF-3200-60 | DC | 3.2 | 1.5 | 1.5 | 60@3.6GHz, 60@3.6-20GHz | SMA |
| QLF-3500-40 | DC | 3.5 | 1.5 | 1.5 | 40@3.85-18GHz | SMA |
| QLF-3870-30 | DC | 3.87 | 2.5 | 1.7 | 30@4.32GHz | SMA |
| QLF-4000-30 | DC | 4 | 1 | 1.7 | 50@4.8~7GHz, 40@7~11GHz, 30@11~12GHz | SMA |
| QLF-4000-60 | DC | 4 | 1.5 | 1.3 | 60@4.5-12.3GHz | SMA |
| QLF-4400-40 | DC | 4.4 | 0.73 | 1.2 | 40@6.28-9.8GHz | SMA |
| QLF-5000-40 | DC | 5 | 0.68 | 1.2 | 40@7.05-10GHz | SMA |
| QLF-5000-45 | DC | 5 | 1 | 2 | 45@5.8-10.5GHz | SMA |
| QLF-5325-30 | DC | 5.325 | 1.5 | 1.5 | 30@5.925GHz | SMA |
| QLF-5500-60 | DC | 5.5 | 3 | 2 | 60@6-20GHz | SMA |
| QLF-6000-20 | 0.5 | 6 | 2 | 1.8 | 20@6.5GHz | SMA |
| QLF-6000-45 | DC | 6 | 1 | 2 | 45@6.8-10.5GHz | SMA |
| QLF-6000-60 | DC | 6 | 1.5 | 1.3 | 60@6.7-15.5GHz | SMA |
| QLF-6500-30 | DC | 6.5 | 1 | 1.8 | 30@8-15GHz | SMA |
| QLF-6500-60 | DC | 6.5 | 1.5 | 1.3 | 60@7.27-15.3GHz | SMA |
| QLF-7000-48 | DC | 7 | 1 | 2 | 48@7.8-11GHz | SMA |
| QLF-7000-50 | DC | 7 | 1.5 | 1.3 | 50@7.77-15.5GHz | SMA |
| QLF-8000-40 | DC | 8 | 2 | 2 | 40@9-25GHz | SMA |
| QLF-8000-40-1 | DC | 8 | 1.2 | 1.5 | 40@8.9~16GHz | SMA |
| QLF-8000-50 | DC | 8 | 1.5 | 1.4 | 50@8.8-16.2GHz | SMA |
| QLF-8000-50-1 | DC | 8 | 1 | 2 | 50@8.8-20GHz | SMA |
| QLF-8000-50-2 | DC | 8 | 1.2 | 2 | 50@9-18GHz | SMA |
| QLF-9000-50 | DC | 9 | 1.5 | 1.4 | 50@9.8-17GHz | SMA |
| QLF-9000-50-1 | DC | 9 | 1 | 2 | 50@15-22GHz | SMA |
| QLF-9000-60 | DC | 9 | 1 | 1.6 | 60@14-17GHz | SMA |
| QLF-9500-50 | DC | 9.5 | 1.5 | 1.4 | 50@10.2-18GHz | SMA |
| QLF-10000-20 | DC | 10 | 0.5 | 1.7 | 20@12GHz | SMA |
| QLF-10000-30 | DC | 10 | 1 | 1.7 | 30@13.2GHz | SMA |
| QLF-10000-30-1 | DC | 10 | 1 | 1.8 | 30@13-40GHz | SMA |
| QLF-10000-35 | DC | 10 | 1 | 2 | 35@11GHz | SMA |
| QLF-10000-50 | DC | 10 | 1.5 | 1.4 | 50@10.9-18.5GHz | SMA |
| QLF-11000-50 | DC | 11 | 1.5 | 1.5 | 50@12.1-19GHz | SMA |
| QLF-11000-50-1 | DC | 11 | 2 | 1.7 | 50@12-40GHz | SMA |
| QLF-11700-50 | DC | 11.7 | 2 | 1.7 | 50@12.7-13.45GHz | SMA |
| QLF-12000-70 | DC | 12 | 1 | 1.7 | 70@14-19GHz | SMA |
| QLF-13000-50 | DC | 13 | 2 | 1.5 | 50@14.1-21GHz | SMA |
| QLF-13000-55 | DC | 13 | 1.5 | 1.8 | 55@15.2-40GHz | SMA |
| QLF-13500-50 | DC | 13.5 | 2 | 1.5 | 50@14.7-21.3GHz | SMA |
| QLF-14000-45 | DC | 14 | 1 | 1.8 | 45@20~40GHz | Φ0.38 PIN |
| QLF-15000-50 | DC | 15 | 2.5 | 1.5 | 50@16-22.3GHz | SMA |
| QLF-16000-50 | DC | 16 | 1.5 | 2 | 50@16.8-24GHz | SMA |
| QLF-17000-50 | DC | 17 | 1.5 | 2 | 50@30-33GHz | SMA |
| QLF-18000-15 | DC | 18 | 1 | 1.7 | 15@20GHz | SMA |
| QLF-18000-35 | DC | 18 | 1.5 | 2 | 35@19-28GHz | SMA |
| QLF-18000-40 | DC | 18 | 2 | 2 | 40@20-38GHz | 2.92mm |
| QLF-18000-45 | DC | 18 | 1.2 | 2 | 45@28-40GHz | SMA |
| QLF-18000-50 | DC | 18 | 3 | 1.6 | 50@19.1-26GHz | SMA |
| QLF-18000-50-1 | DC | 18 | 2 | 2 | 50@18.8-19.5GHZ | SMA |
| QLF-20000-25 | DC | 20 | 2 | 2 | 25@23-40GHz | SMA |
| QLF-20000-50 | DC | 20 | 1.2 | 2 | 50@22GHz | SMA |
| QLF-20000-60 | DC | 20 | 1 | 2 | 60@23-40GHz | 2.92mm |
| QLF-20000-70 | DC | 20 | 1.5 | 1.8 | 70@24GHz | SMA |
| QLF-20000-75 | DC | 20 | 1.5 | 2 | 75@24-44GHz | SMA |
| QLF-25000-40 | DC | 25 | 2 | 2 | 40@28-30GHz | 2.92mm |
| QLF-25000-40-1 | DC | 25 | 1.5 | 1.7 | 40@28-40GHz | 2.92mm |
| QLF-25000-40-2 | DC | 25 | 2 | 2 | 40@28-40GHZ, 70@30-44GHz | 2.92mm |
| QLF-26000-30 | DC | 26 | 1.5 | 1.7 | 30@28GHz, 70@29~40GHz | SMA |
| QLF-28000-30 | DC | 28 | 2 | 2 | 30@30-38GHz | 2.4mm |
| QLF-33000-25 | DC | 33 | 3 | 2 | 25@37-50GHz | 2.92mm |
| QLF-40000-20 | DC | 40 | 2 | 2 | 20@60GHz, 40@65GHz, 60@70GHz | 2.92mm |
| QLF-50000-20 | DC | 50 | 2 | 2.5 | 20@60GHz | 2.4mm |