Highpass Filters are used in applications that require a range of high frequencies to be passed while attenuating lower out of band frequencies.
TTE’s highpass filters are available for any -3dB frequency from 100 Hz to 4 GHz. For frequencies above or below that range please contact TTE for assistance.
HIGHPASS FILTER FORMULAS:
This example uses the delay data for an HB11-12MHz-50.
To calculate the delay at 62.5% of the cut-off frequency we find the normalized delay is 4Div below the reference of 2.5S. Each division is 0.5mS. Thus, the normalized delay is 2.5S minus 2S. Which is 500mS at 19.2 MHz. The cut-off frequency is 12 MHz.
Delay = (Time in seconds) / Fc – Cut off Frequency)
TTE offers its passive filters in the smallest practical sizes available; PCB, SMT or connectorized (BNC or SMA) cases are typically utilized, depending on the specific filter design.