radiation resistance


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radiation resistance

A ficticious resistance in which the power radiated away from or collected by an antenna is considered to be dissipated. For a perfect antenna made of superconducting material, the ohmic losses (power dissipation arising from resistance) in the elements themselves are zero; the resistive part of the impedance presented at the feed point is then equal to the radiation resistance. In any practical antenna the ohmic losses are kept as small as possible in comparison to the radiated power. Maximum power transfer between transmitter or receiver and the antenna is effected when the feeder has a characteristic impedance equal to the radiation resistance.

radiation resistance

[‚rād·ē′ā·shən ri‚zis·təns]
(acoustics)
For a medium, the acoustic impedance of a plane wave in that medium. Also known as radiation impedance.
(electromagnetism)
The total radiated power of an antenna divided by the square of the effective antenna current measured at the point where power is supplied to the antenna.
References in periodicals archive ?
Disorder aids both conductivity and radiation resistance.
It has also passed SAE J1113/1 and ISO 7637-2 to become the only storage solution provider with multiple in-vehicle computing compliant standards for radiation resistance.
These surviving spores had higher concentrations of proteins associated with UV radiation resistance and, in fact, showed elevated UV resistance when revived and re-exposed on Earth.
For example, they attempt to match the antenna's radiation resistance from EM waves to the optimal load impedance of the transceiver.
Part III presents a few chapters on monocyte-macrophage differentiation and T lymphocytes, while part IV addresses a range of general disease-related topics including sepsis, lysosomal degradation, cancer sensitization, biliary cirrhosis, cardiovascular disease, fatty liver disease, UV radiation resistance, Huntingtin protein degradation, and Lewy body disease.
The radiation resistance his experiments uncovered, he said, could explain why glioblastoma, the deadliest and most aggressive form of brain cancer, is so hard to neat with radiation.
The radiation resistance and directivity are calculated from the radiation fields.
the radiation resistance is altogether neglected and the wave is considered totally guided along the TL.
Controlling the radiation resistance of breast cancer stem cells and the generation of new iBCSC during radiation treatment may ultimately improve curability and may allow for de-escalation of the total radiation doses currently given to breast cancer patients, thereby reducing acute and long-term adverse effects," the study stated.
Then, the resonant frequency and radiation resistance are obtained from resonant curve of the surface current and equivalent capacitance of the patch.
They offer a unique combination of properties, including high temperature performance, mechanical strength, chemical resistance, electrical insulation, excellent wear and abrasion resistance, purity, radiation resistance, and low moisture absorption, it added.

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