The fundamental cut off frequency of the waveguide part can be derived from Equation (11) .
So, first resonance of the antenna should occur after the fundamental cut off frequency 11.
It is seen that, with an increase in the slot width, the lower cut off frequency
decreases, and the bandwidth increases.
When the width of DGS is increased, the cut off frequency
of the parallel resonant circuit in equivalent circuit decreases, and because c2 has same value, the lower stop frequency does not change significantly.
This finding indicates that further increasing the center dipole length could lower the cut off frequency
and thus produce better impedance bandwidth.
Cut off frequency
of proposed first order filter is given in (10):
Formed on a large diameter silicon substrate, the gallium nitride high electron mobility transistor (GaN-HEMT) achieves a world record transconductance rating of 350mS/mm, a maximum oscillation frequency of 115GHz and a current gain cut off frequency
of 56GHz, which are all comparable to figures achieved on conventional silicon carbide (SiC) substrates.
The receiver chain includes a low pass filter with programmable cut off frequency
, enabling the PHY3070 to support five discrete data rates in the range 1Gbps to 10.
A traditional DGS element uses a dumbbell-shaped pattern etched in the ground plane and can provide only one attenuation pole , which limits the bandwidth of the stopband and the cut off frequency
Cut off frequency
is an indicator of frequency performance for devices, and determined when the gain is 1.
The KNA21 EMI filter features a cut off frequency
of 400MHz and attenuation range of 800MHz to 2.
Low pass frequency (LPF) circuitry is built-in, with a cut off frequency
of 7 kilohertz (KHz), to prevent harmless vibration from interfering with disk drive operation.