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Filter Features

• High order maximally flat design
• Low passband insertion loss
• Broad, high frequency pass and stopbands
• Lumped-element, microstrip, cavity and GaAs MMIC

Learn More About Filters

RF/Microwave filters are a fundamental component of signal processing. They pass signals within their passband and reject signals outside the passband. Marki filters are reflective, meaning that they reflect signals outside of the passband. Important specifications include rejection (the measure of how well undesired signals are rejected), steepness of the rejection skirts, insertion loss, and return loss. Typically size is also important for filters; there is a fundamental tradeoff between rejection and filter size, as both are determined by the ‘order’ of the filter. A higher order filter has more rejection, but also requires more space and has a higher insertion loss. Marki filters offer moderate rejection and rejection skirts, but across very broad bandwidths.

Filters

FeaturedModelDatasheetStockCutoff Frequency [GHz]30 dB Rejection Frequency [GHz]50 dB Rejection Frequency [GHz]80 dB Rejection Frequency [GHz]S-ParametersSurface MountBare DieModuleRoHS
NFH-1700 PDF Download0171411.56FH-1700--$525.00Y
NFH-1800 PDF Download01815126.5FH-1800--$525.00Y
NFH-2600 PDF Download2621.51811FH-2600--$675.00Y
NFH-4000 PDF Download04036.63325FH-4000--$795.00Y
NFH-5500 PDF Download55514535FH-5500--$1,100.00Y

FeaturedModelDatasheetStockCenter Frequency [GHz]Low Frequency 1 dB Cutoff [GHz]High Frequency 1 dB Cutoff [GHz]S-ParametersSurface MountBare DieModuleRoHS
NFB-0785SM PDF Download7.857.258.45FB-0785SM$81.25--N
NFB-0850SM PDF Download8.57.859.2FB-0850SM$81.25--N
NFB-0900SM PDF Download9.08.49.6FB-0900SM$81.25--N
NFB-0955SM PDF Download9.558.910.2FB-0955SM$81.25--N
NFB-1050SM PDF Download10.59.611.4FB-1050SM$81.25--N
NFB-1140SM PDF Download11.410.4512.35FB-1140SM$81.25--N
NFB-1215SM PDF Download12.1511.3512.95FB-1215SM$81.25--N
NFB-1300SM PDF Download013.012.014.0FB-1300SM$81.25--N
NFB-1445SM PDF Download14.4513.215.7FB-1445SM$81.25--N
NFB-1575SM PDF Download015.7514.616.9FB-1575SM$81.25--N
NFB-0785 PDF Download07.857.258.45FB-0785--$276.00N
NFB-0860 PDF Download08.67.959.25FB-0860--$276.00N
NFB-0905 PDF Download9.058.459.65FB-0905--$276.00N
NFB-0955 PDF Download09.558.910.2FB-0955--$276.00N
NFB-1050 PDF Download010.59.7511.25FB-1050--$276.00N
NFB-1145 PDF Download11.4510.612.3FB-1145--$276.00N
NFB-1215 PDF Download012.1511.313FB-1215--$276.00N
NFB-1310 PDF Download013.112.214FB-1310--$276.00N
NFB-1390 PDF Download13.913.4814.32FB-1390--$276.00N
NFB-1445 PDF Download14.4513.315.6FB-1445--$276.00N
NFB-1575 PDF Download15.7514.517FB-1575--$276.00N
NFB-1725 PDF Download017.2515.818.7FB-1725--$276.00N
NFB-1800 PDF Download1815.8520.15FB-1800--$316.25N
NFB-1840 PDF Download018.416.6520.15FB-1840--$316.25N
NFB-2000 PDF Download02018.621.4FB-2000--$316.25N
NFB-2060 PDF Download20.618.9522.25FB-2060--$316.25N
NFB-2400 PDF Download2422.425.6FB-2400--$316.25Y
NFB-2430 PDF Download024.321.2527.35FB-2430--$316.25N
NFB-3270 PDF Download032.728.7536.65FB-3270--$412.50N
NFB-3700 PDF Download03732.5541.45FB-3700--$412.50N
NFB-4000 PDF Download04034.445.6FB-4000--$572.25N
NFB-2480 PDF Download024.821.128.5FB-2480--$377.00N
NFB-2770 PDF Download27.723.5531.85FB-2770--$412.50N
NFB-1655 PDF Download016.5515.817.3FB-1655--$276.00N
NFB-1690 PDF Download016.915.718.1FB-1690--$276.00N
NFB-1500 PDF Download0151218FB-1500--$365.63N
NFB-2250 PDF Download22.51827FB-2250--$412.50N
NFB-2500 PDF Download251832FB-2500--$472.50N
NFB-2020 PDF Download020.217.223.2FB-2020--$316.25N
NFB-1385 PDF Download13.8511.516.2FB-1385--$373.75N
NFB-1450 PDF Download014.511.117.9FB-1450--$365.63N
NFB-3300 PDF Download0332640FB-3300--$472.50N
Y PDF Download119.512.5MFB-1100-RFQ-Y
Y PDF Download1612.618.6MFB-1600-RFQ-Y
Y PDF Download20.2516.7524.4MFB-2025-RFQ-Y
NMFB-2400 PDF Download242127MFB-2400-RFQ-Y
NMFB-2500 PDF Download0251832MFB-2500-RFQ-Y
Y PDF Download26.2521.530MFB-2625-RFQ-Y
Y PDF Download31.7526.636.7MFB-3175-RFQ-Y
NMFB-3300 PDF Download332640MFB-3300-RFQ-Y
Y PDF Download33.253234.3MFB-3325-RFQ-Y
NMFB-3450 PDF Download352445MFB-3450-RFQ-Y
Y PDF Download34.7529.540MFB-3475-RFQ-Y
NMFB-5350 PDF Download534067MFB-5350-RFQ-Y

Lowpass

A lowpass 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. Marki lowpass filters are microstrip filters that are CAD optimized and built on a low loss substrate, offering very broad rejection bands before re-entrant modes appear.

Highpass

A highpass filter will reject signals below their designed frequency of operation, and pass all signals above this. Important specifications include rejection of low frequency signals, insertion loss, return loss, and insertion loss flatness above the 3 dB cutoff frequency. Marki highpass filters are based on a cavity design that offers operation to very high frequencies with broad, resonance free passband and stopbands.

Filters

FeaturedModelDatasheetStockCutoff Frequency [GHz]30 dB Rejection Frequency [GHz]50 dB Rejection Frequency [GHz]80 dB Rejection Frequency [GHz]S-ParametersSurface MountBare DieModuleRoHS
NFH-1700 PDF Download0171411.56FH-1700--$525.00Y
NFH-1800 PDF Download01815126.5FH-1800--$525.00Y
NFH-2600 PDF Download2621.51811FH-2600--$675.00Y
NFH-4000 PDF Download04036.63325FH-4000--$795.00Y
NFH-5500 PDF Download55514535FH-5500--$1,100.00Y

Bandpass

A bandpass filter is capacitively coupled between the two ports, offering rejection of both low frequency and high frequency signals and selecting a particular band referred to as the ‘passband’. Important specifications include the center frequency, passband (expressed either as start and stop frequencies or as a percentage of the center frequency), rejection and steepness of rejection, and width of the rejection bands. All bandpass filters will have re-entrant modes at higher frequencies, so the width of the high frequency rejection band is an important consideration. Marki bandpass filters are microstrip filters that are CAD optimized and built on a low loss substrate, offering extremely broad rejection bands. Marki offers two types of bandpass filters: CAD-optimized microstrip filters built on a low-loss substrate offered in surface mount and connectorized packages, and GaAs MMIC filters with tight fabrication tolerances offered as bare die. Both offer low loss and extremely broad rejection bands.

Filters

FeaturedModelDatasheetStockCenter Frequency [GHz]Low Frequency 1 dB Cutoff [GHz]High Frequency 1 dB Cutoff [GHz]S-ParametersSurface MountBare DieModuleRoHS
NFB-0785SM PDF Download7.857.258.45FB-0785SM$81.25--N
NFB-0850SM PDF Download8.57.859.2FB-0850SM$81.25--N
NFB-0900SM PDF Download9.08.49.6FB-0900SM$81.25--N
NFB-0955SM PDF Download9.558.910.2FB-0955SM$81.25--N
NFB-1050SM PDF Download10.59.611.4FB-1050SM$81.25--N
NFB-1140SM PDF Download11.410.4512.35FB-1140SM$81.25--N
NFB-1215SM PDF Download12.1511.3512.95FB-1215SM$81.25--N
NFB-1300SM PDF Download013.012.014.0FB-1300SM$81.25--N
NFB-1445SM PDF Download14.4513.215.7FB-1445SM$81.25--N
NFB-1575SM PDF Download015.7514.616.9FB-1575SM$81.25--N
NFB-0785 PDF Download07.857.258.45FB-0785--$276.00N
NFB-0860 PDF Download08.67.959.25FB-0860--$276.00N
NFB-0905 PDF Download9.058.459.65FB-0905--$276.00N
NFB-0955 PDF Download09.558.910.2FB-0955--$276.00N
NFB-1050 PDF Download010.59.7511.25FB-1050--$276.00N
NFB-1145 PDF Download11.4510.612.3FB-1145--$276.00N
NFB-1215 PDF Download012.1511.313FB-1215--$276.00N
NFB-1310 PDF Download013.112.214FB-1310--$276.00N
NFB-1390 PDF Download13.913.4814.32FB-1390--$276.00N
NFB-1445 PDF Download14.4513.315.6FB-1445--$276.00N
NFB-1575 PDF Download15.7514.517FB-1575--$276.00N
NFB-1725 PDF Download017.2515.818.7FB-1725--$276.00N
NFB-1800 PDF Download1815.8520.15FB-1800--$316.25N
NFB-1840 PDF Download018.416.6520.15FB-1840--$316.25N
NFB-2000 PDF Download02018.621.4FB-2000--$316.25N
NFB-2060 PDF Download20.618.9522.25FB-2060--$316.25N
NFB-2400 PDF Download2422.425.6FB-2400--$316.25Y
NFB-2430 PDF Download024.321.2527.35FB-2430--$316.25N
NFB-3270 PDF Download032.728.7536.65FB-3270--$412.50N
NFB-3700 PDF Download03732.5541.45FB-3700--$412.50N
NFB-4000 PDF Download04034.445.6FB-4000--$572.25N
NFB-2480 PDF Download024.821.128.5FB-2480--$377.00N
NFB-2770 PDF Download27.723.5531.85FB-2770--$412.50N
NFB-1655 PDF Download016.5515.817.3FB-1655--$276.00N
NFB-1690 PDF Download016.915.718.1FB-1690--$276.00N
NFB-1500 PDF Download0151218FB-1500--$365.63N
NFB-2250 PDF Download22.51827FB-2250--$412.50N
NFB-2500 PDF Download251832FB-2500--$472.50N
NFB-2020 PDF Download020.217.223.2FB-2020--$316.25N
NFB-1385 PDF Download13.8511.516.2FB-1385--$373.75N
NFB-1450 PDF Download014.511.117.9FB-1450--$365.63N
NFB-3300 PDF Download0332640FB-3300--$472.50N
Y PDF Download119.512.5MFB-1100-RFQ-Y
Y PDF Download1612.618.6MFB-1600-RFQ-Y
Y PDF Download20.2516.7524.4MFB-2025-RFQ-Y
NMFB-2400 PDF Download242127MFB-2400-RFQ-Y
NMFB-2500 PDF Download0251832MFB-2500-RFQ-Y
Y PDF Download26.2521.530MFB-2625-RFQ-Y
Y PDF Download31.7526.636.7MFB-3175-RFQ-Y
NMFB-3300 PDF Download332640MFB-3300-RFQ-Y
Y PDF Download33.253234.3MFB-3325-RFQ-Y
NMFB-3450 PDF Download352445MFB-3450-RFQ-Y
Y PDF Download34.7529.540MFB-3475-RFQ-Y
NMFB-5350 PDF Download534067MFB-5350-RFQ-Y

Diplexers Features

• High Isolation
• Reentrance and Resonance Free Passbands
• Reflectionless termination of unwanted harmonics
• Broad, high frequency passbands
A diplexer is a three port device that combines or divides a common signal according to frequency, into low pass and high pass ports. Unlike a duplexer, which combines two bandpass filters, diplexers are very broadband. Important specifications include frequency coverage, out of band rejection for the high/low pass filters, isolation between the high/low pass filters, insertion loss, and return loss. Marki diplexers offer extremely broad, resonance free passbands. Diplexers can be used as low loss combiners or dividers for signals with different frequencies or as reflectionless filters (with one port terminated) at the output of mixers and other nonlinear devices with many harmonics. Marki offers two types of diplexers: CAD-optimized microstrip filters built on a low-loss substrate offered in surface mount and connectorized packages, and GaAs MMIC filters with tight fabrication tolerances offered as bare die. Both offer low loss and extremely broad rejection bands.

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