Search results
Results from the WOW.Com Content Network
Solid state switches are categorized as absorptive or reflective. Absorptive switches incorporate a 50 ohm termination in each of the output ports to present a low VSWR in both the OFF and ON states. Reflective switches conduct RF power when the diode is reverse biased and reflect RF power when forward biased.
An RF anechoic chamber used for EMC testing. In materials science, radiation-absorbent material (RAM) is a material which has been specially designed and shaped to absorb incident RF radiation (also known as non-ionising radiation), as effectively as possible, from as many incident directions as possible.
If the isolators in figure 20 are neglected, the isolation measurement (port P 2 to port P 3) determines the amount of power from the signal generator F 2 that will be injected into the signal generator F 1. As the injection level increases, it may cause modulation of signal generator F 1, or even injection phase locking.
An optical comb generator can be used as generators of terahertz radiation. Internally, it is a resonant electro-optic modulator , with the capability of generating hundreds of sidebands with total span of at least 3 terahertz (limited by the optical dispersion of the lithium niobate crystal) and frequency spacing of 17 GHz.
The prior art includes an RF MEMS frequency tunable fractal antenna for the 0.1–6 GHz frequency range, [18] and the actual integration of RF MEMS switches on a self-similar Sierpinski gasket antenna to increase its number of resonant frequencies, extending its range to 8 GHz, 14 GHz and 25 GHz, [19] [20] an RF MEMS radiation pattern ...
Resonators have also been used to characterize a variety of absorption spectra for the purposes of chemical identification, particularly in the gaseous phase. [24] Another potential application for optical ring resonators are in the form of whispering gallery mode switches.
A doubly terminated filter (the normal case) is one where the generator and load, connected to the input and output ports respectively, have impedances matching the filter characteristic impedance. A singly terminated filter has a matching load, but is driven either by a low impedance voltage source or a high impedance current source.
An RF connector must not allow external signals into the circuit through electromagnetic interference and capacitive pickup. Mechanically, RF connectors may provide a fastening mechanism ( thread , bayonet , braces, blind mate ) and springs for a low ohmic electric contact while sparing the gold surface, thus allowing very high mating cycles ...