TTE Filters has developed a broad range of RF and microwave capabilities over the course of its nearly 60 year history. Please refer to the table below for an overview of the company’s design capabilities and typical frequencies; it is provided as a general guide. Please contact TTE for assistance with your application even if it is not addressed in the table; it is highly likely the company has expertise to meet your needs. Descriptions of each filter type are provided below the table. TTE’s Corporate Capabilities Brochure provides this information in PDF format.

Additional Capabilities:

  • Professional Design & Engineering Support – decades of filter expertise help TTE to deliver effective designs and efficient solutions for filter applications around the world.
  • Comprehensive Testing Lab – thermal shock, life and other testing performed in-house gives TTE control over testing and timing, helping customers meet project deadlines.
  • Outstanding Customer Service – Speed Quotes, rapid turnaround, inventory management and other tools enable TTE to be highly responsive to customer requests.

The majority of the company’s products are custom made and built to order. Most products are delivered within 2 weeks; expedited lead times of 3-5 days are available on some products. All of TTE’s products are made in the USA and include a limited warranty.

TTE Filters – Design Capabilities and Typical Frequencies*

*Other designs and frequencies are feasible; please contact TTE for assistance with your requirements
** High Power version is also available with power handling up to 300 Watts and frequency range from 600 kHz to 600 MHz

Band Rejection Filters

Butterworth Filters offer monotonic passbands.

Chebyshev Filters have a low ripple passband of ±0.25 dB typical.

Elliptical Function Filters have a passband ripple of ±0.25 dB typical.  These filters are more selective than Butterworth or Chebyshev topologies.

Bandpass Filters

Bessel Filters exhibit a constant time delay in the passband of the filter.

Butterworth Filters are more selective than Bessel Filters and offer both monotonic passband and monotonic stopbands.

Chebyshev Filters have low ripple passbands and monotonic stopbands.  The passband ripple is ±0.25 dB typical.

Elliptical Function Filters offer better selectivity than Chebyshev Filters.  The passband ripple is ±0.25 dB typical.  Elliptical Function Filters exhibit poles and zeros in the stopband that are below the specified rejection level.

Gaussian Filters are designed to pass a step function with zero overshoot and minimum rise.  Similar to Bessel Filters, they offer limited selectivity.

Highpass Filters

Butterworth Filters offer both monotonic passbands and monotonic stopbands.

Chebyshev Filters have low ripple passbands and monotonic stopbands.  The passband ripple is ±0.25 dB typical.

Elliptical Function Filters offer better selectivity than Chebyshev Filters. The passband ripple is ±0.25 dB typical.  Elliptical Function Filters exhibit poles and zeros in the stopband that are below the specified rejection level.

Lowpass Filters

Bessel Filters exhibit a constant time delay in the passband of the filter.

Butterworth Filters are more selective than Bessel Filters and offer both monotonic passbands and monotonic stopbands.

Chebyshev Filters have low ripple passbands and monotonic stopbands.  The passband ripple is 0.25 dB typical.

High Power Chebyshev Filters offer power handling up to 300 Watts and frequency range from 600 kHz to 600 MHz.

Elliptical Function Filters offer better selectivity than Chebyshev Filters.  The passband ripple is ±0.25 dB typical.  Elliptical Function Filters exhibit poles and zeros in the stopband that are below the specified rejection level.

Gaussian Filters are designed to pass a step function with zero overshoot and minimum rise.  Similar to Bessel Filters they offer limited selectivity.