tuning screw

tuning screw

[′tün·iŋ ‚skrü]
(electromagnetism)
A screw that is inserted into the top or bottom wall of a waveguide and adjusted as to depth of penetration inside for tuning or impedance-matching purposes.
References in periodicals archive ?
First, we measure the filter when the tuning screw in the two different position states, then the coarse model parameters is extracted by the Cauchy method.
The filters didn't have any frequency tuning screw.
In this step, the coefficients of the network model are produced, then the parameter is extracted by the vector fitting technique [22], and the tuning screw positions are predicted by the ASM technique.
They also require a tuning screw for accurate setting of frequency and special mounting operations, which results in high material and labor costs.
As it has been mentioned before, there is direct correspondence between coupling matrix entries and tuning screw elements, and therefore also between its deviations [DELTA][m.
A tuning screw of about 1/3 the junction width diameter, having a radial bottom and placed in the exact center of the side wall hybrid junction, is an efficient tool for fine balance and return loss adjustments.
Capacitor tuning is accomplished with a unique nonrotating torque mechanism that keeps the tuning screw head position fixed in the axial plane, permitting the use of an O-ring to accomplish a 40 psi dynamic environmental seal without requiring separate seal caps that can fall off and cause short circuits.
Like the input multiplexer, coupling between modes can be achieved by means of a tuning screw.
Find the filter impedance and the tuning screw intervals.
Design considerations include: Probe dimensions (length and width), coaxial transmission line dimensions, distance from the probe to the backshort, and tuning screw placement and diameter.
JA: "It is 18 inches deep with a 15inch diameter drum 'skin' which is held in place by six tuning screws.