RF Helical Bandpass Filter is composed of varying numbers of resonators; normally it could be 2 to 6
sections, and the structural shape is similar to a spiral, which is also called a spiral filter. The
basic structure and operation of the Helical Bandpass Filter are passive components without power.
Physically, an RF Helical Filter is a spiral coil surrounded by a square conductive shielding shell.
One end of the spiral coil is connected to the load, and the other end remains open, Its working
principle is similar to a coaxial resonator, but the length of its wavelength is much shorter
because the spiral-shaped inner conductor will reduce the wave propagation speed, and the length of
the wire is only a quarter of the target wavelength.
RF Helical Bandpass Filter has excellent environmental adaptability, especially the corresponding
operating performance can be set for a special temperature environment. Generally, RF Helical Filter
can operate from -30°C to +75°C, However, the performance can be adjusted separately for -40℃ or
+85℃. In theory, due to the special manufacturing method, it can have a higher Q value performance,
so in terms of insertion loss and attenuation, Has excellent performance.
Looking for Tunable RF Bandpass Filter means looking for Helical Tunable Bandpass Filter as well.
