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Band Pass Filter Tutorial

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Band Pass Filter Tutorial

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Band Pass Filters (BPFs) are used to pass (transmit) a range of wavelengths and to block (reflect) other wavelength on either side of the bandpass. The region of high transmittance is known as the passband and the region of high reflectance is known as the reject or reflect band. The pass-band and reflect-bands are separated by the roll-off region. The complexity of these filters depends primarily on the steepness of the roll-off region, the width of the pass-band and also on the ripple and insertion loss specifications in the pass-band. In the case of a relatively high angle of incidence, polarization dependent loss may also be a consideration.

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