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NOTCH FILTER FORMULAS:
Center Frequency:
\(\begin{equation*}
F_{n} \ =\ \sqrt{F”_{-3dB} \ *\ F’_{=3dB}}
\end{equation*}\)
Low Frequency Stopband:
\(
\begin{equation*}
LF_{x} \ =\ \frac{\sqrt{( Stopband\ BW)^{2} \ +\ 4*( F_{0})^{2} \ -\ Stopband\ BW}}{2}
\end{equation*}\)
High Frequency Stopband:
\(\begin{equation*}
HF_{x} \ =\ LF_{x} \ +\ Stopband\ BW
\end{equation*}\)
The actual stopband frequencies may vary at frequency and bandwidth extremes.
Time Delay:
To calculate a specific time delay from the simulated data, use the frequency of interest. Referring to the, KB4, delay simulation on page 1.5, and assuming a center frequency of 420 MHz the delay is calculated as follows:
Delay = 6.5/420*106
= 15.48nSeconds at 420 MHz
NOTES:
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.
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For assistance please call 1-716-532-2234 or email us at tte@tte.com
MADE IN USA
All TTE products are Made in the USA. Most are delivered within 2-3 weeks. Expedited lead times of 3-5 days are available on many products.
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TTE offers you several ways to obtain a filter specification quote. The easiest way is to use TTE’s Speed Quote below and submit it directly to TTE.