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RF Low Pass Filters

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About RF Low Pass Filters

RF low pass filters pass signals from low frequencies and reject signals from high frequencies. Performance specifications include specified frequency, bandwidth, ripple, insertion loss, and voltage standing wave ratio. For RF low pass filters, the specified frequency is the cut-off frequency. Bandwidth is the range of frequencies that low pass filters pass with minimal attenuation. Ripple is the peak-to-peak variation of the passband response. Insertion loss is the total RF power transmission loss resulting from the insertion of a device in a transmission line. Insertion loss is the ratio of signal power at the output of the inserted device to the signal power at its input. Voltage standing wave ratio (VSWR) is a unit-less ratio ranging from 1 to infinity that expresses the amount of reflected energy. A value of 1 indicates that all of the energy passes. Any other value indicates that a portion of the energy is deflected. VSWR can also be expressed in terms of decibels (dB). 

There are several mounting styles for RF low pass filters. Surface mount technology (SMT) adds components to a printed circuit board (PCB) by soldering component leads or terminals to the top surface of the board. Through-hole technology (THT) mounts components by inserting component leads through holes in the board and then soldering the leads in place on the opposite side of the board. Flat pack (FPAK) devices have flat leads and are available in a variety of body sizes and pin counts. Connectorized devices attach with coaxial or other types of connectors. They provide exceptional thermal and electrical performance and are available in cavity-up and cavity-down configurations. Waveguide assemblies consist of a hollow metallic conductor with a rectangular or elliptical cross-section. Some conductors contain solid or gaseous dielectric materials. 

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Products & Services Related to RF Low Pass Filters

RF Band Pass Filters
RF band pass filters are active or passive circuits that pass signals from a specific frequency band and reject signals from out-of-band frequencies. Surface acoustic wave (SAW) filters, crystal filters, and cavity filters are types of band pass filters.
RF Band Reject Filters
RF band reject filters are tuned circuits that prevent the passage of signals within a specified band of frequencies. These devices are also known as bandstop or notch filters.
RF Filters and Microwave Filters
RF filters and microwave filters are devices that pass or reject signals by frequency. Basic types include bandpass filters, band reject filters, low pass filters, and high pass filters.
RF High Pass Filters
RF high pass filters pass signals from high frequencies and reject signals from low frequencies.

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Engineering Web: RF Low Pass Filters

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Part Numbers for RF Low Pass Filters

Part # Distributor Manufacturer Product Category Description
LP0603A0950ANTR Digi-Key AVX Corporation Filters LOW PASS FILTER 950MHZ 0603 SMD
LP0603A2442ANTR\500 Digi-Key AVX Corporation Filters LOW PASS FILTER 2442MHZ 0603 SMD
LP0805A1960AWTR Digi-Key AVX Corporation Filters LOW PASS FILTER 1960MHZ 0805 SMD
LP0805A2600ASTR Digi-Key AVX Corporation Filters LOW PASS FILTER 2600MHZ 0805 SMD
LP0603A1880ALTR Digi-Key AVX Corporation Filters LOW PASS FILTER 1880MHZ 0603 SMD

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