Highpass Filter

The highpass filter prevents the transmission of frequencies below a determined cutoff point and appears electrically transparent to frequencies above this point. In other words it rejects low frequencies and passes high frequencies. Hence the term highpass filter.

Filtronetics can supply both LC highpass filters and microwave highpass filters.

LC highpass filters utilize inductors and capacitors in their design. They are typically in the frequency range of a few hertz to 1 GHz. Microwave highpass filters are typically in the range of 500 MHz to 20 GHz. It is important to note that in practice, a highpass filter’s upper pass band does not extend to infinity due to stray capacitance, inductive effects, and multimode phenomena.

Filtronetics Inc. supplies highpass filters with monotonic, elliptic and custom designs. Relizations include characteristic responses of Buterworth, Chebyshev, Cauer, Gaussian, Bessel (maximally flat delay), Equal ripple delay, Legendre as well as custom responses. These filters can be group delay equalized, amplitude equalized, or phase equalized, amplitude matched, delay matched, or phase matched, amplitude tracked, delay tracked, or phase tracked. We have special designs for good ring-down or overshoot response as well as good IP2 or second third order intermodulation and IP3 or third order intermodulation characteristics.

Our filters have been utilized in systems in space, military, undersea, airborne, testing, and commercial applications. We can produce from one to over a million highpass filters for your application. highpass filter packages include surface mount (SMD), through-hole, and with connectors (BNC, TNC, SMA or N).