FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1891489613> ?p ?o ?g. }

• W1891489613 endingPage "52" @default.
• W1891489613 startingPage "47" @default.
• W1891489613 abstract "The coming years will see the widespread deployment of small, low-cost, interactive satellite terminals. Unlike the popular Ku-band direct broadcast receiveonly terminals, the Ka-band user terminals will transmit to the satellite. Due to the small size of these terminals, on the order of 1 m in diameter, they may be installed on the premises of homes and businesses where people may be present in the vicinity. To keep subscriber costs low, system designers wish to achieve blanket licensing on their most popular terminals, avoiding the cost of licensing each terminal installation. To accomplish this the terminals must be demonstrated to be safe, to include radiated power density levels, given that certain installation guidelines are observed. However, power densities generated even by these small terminals may exceed levels that have been established as safe for human exposure. Exact power densities are a function of the given terminal design, but are largely driven by EIRP and antenna size limitations imposed on the terminal. So the system designer will want to have an idea of the range of power density levels that may be created near the installation by a given terminal specification that includes EIRP and a maximum aperture size constraint imposed by marketability requirements. The system designer will also want to be aware of installation constraints created by a given choice of terminal characteristics. Electromagnetic field restrictions have been derived from research into the effects of radiation on biological matter, which shows that increasing the body temperature by 1◦C results in tissue damage. The specific power absorption required to produce such a temperature rise is estimated to be 4 W/kg for whole-body absorption. Applying safety factors, it has been determined that the resulting limits on power density should be set at 50 W/m2 (5 mW/cm2) for occupational exposure and 10 W/m2 (1 mW/cm2) for general public exposure. These levels are mentioned in both FCC and international documentation. While these levels apply to whole-body exposure, international guidelines imply that localized power densities may be up to 20 times higher averaged over 1 cm2. The averaging time specified in FCC guidelines [1] is 6 min for occupational exposure and 30 min for general exposure. The international guidelines [2] define the averaging time as a function of frequency as 68/f1.05, or about 2 min at 30 GHz. There are four regions (Fig. 1) which are of interest in a power density level analysis: the interior of the antenna, the main reflector spillover, the near field, and the subreflector spillover (if applicable). With the exception of the subreflector spillover region, the power densities can be estimated as a function of transmitter and antenna size and sidelobe level. So the levels can be estimated from the specified requirements regardless of the specific antenna design geometry. The analysis that follows will do that for the first three regions mentioned. In the subreflector spillover region, however, the levels are highly dependent on the size of the sub and whether a cassegrain or gregorian configuration is used. Power densities for a few representative cases will be estimated in the subreflector spillover region." @default.
• W1891489613 created "2016-06-24" @default.
• W1891489613 creator A5043127874 @default.
• W1891489613 date "2002-04-01" @default.
• W1891489613 modified "2023-09-28" @default.
• W1891489613 title "Radiation safety for small Ka-band satellite interactive terminals" @default.
• W1891489613 cites W2162845778 @default.
• W1891489613 cites W2283635835 @default.
• W1891489613 cites W3212663278 @default.
• W1891489613 hasPublicationYear "2002" @default.
• W1891489613 type Work @default.
• W1891489613 sameAs 1891489613 @default.
• W1891489613 citedByCount "0" @default.
• W1891489613 crossrefType "journal-article" @default.
• W1891489613 hasAuthorship W1891489613A5043127874 @default.
• W1891489613 hasConcept C105339364 @default.
• W1891489613 hasConcept C111919701 @default.
• W1891489613 hasConcept C119599485 @default.
• W1891489613 hasConcept C121332964 @default.
• W1891489613 hasConcept C127413603 @default.
• W1891489613 hasConcept C146978453 @default.
• W1891489613 hasConcept C163258240 @default.
• W1891489613 hasConcept C19269812 @default.
• W1891489613 hasConcept C21822782 @default.
• W1891489613 hasConcept C2777720951 @default.
• W1891489613 hasConcept C2779664074 @default.
• W1891489613 hasConcept C34556337 @default.
• W1891489613 hasConcept C41008148 @default.
• W1891489613 hasConcept C4495656 @default.
• W1891489613 hasConcept C62520636 @default.
• W1891489613 hasConcept C761482 @default.
• W1891489613 hasConcept C76155785 @default.
• W1891489613 hasConcept C78336883 @default.
• W1891489613 hasConcept C78519656 @default.
• W1891489613 hasConceptScore W1891489613C105339364 @default.
• W1891489613 hasConceptScore W1891489613C111919701 @default.
• W1891489613 hasConceptScore W1891489613C119599485 @default.
• W1891489613 hasConceptScore W1891489613C121332964 @default.
• W1891489613 hasConceptScore W1891489613C127413603 @default.
• W1891489613 hasConceptScore W1891489613C146978453 @default.
• W1891489613 hasConceptScore W1891489613C163258240 @default.
• W1891489613 hasConceptScore W1891489613C19269812 @default.
• W1891489613 hasConceptScore W1891489613C21822782 @default.
• W1891489613 hasConceptScore W1891489613C2777720951 @default.
• W1891489613 hasConceptScore W1891489613C2779664074 @default.
• W1891489613 hasConceptScore W1891489613C34556337 @default.
• W1891489613 hasConceptScore W1891489613C41008148 @default.
• W1891489613 hasConceptScore W1891489613C4495656 @default.
• W1891489613 hasConceptScore W1891489613C62520636 @default.
• W1891489613 hasConceptScore W1891489613C761482 @default.
• W1891489613 hasConceptScore W1891489613C76155785 @default.
• W1891489613 hasConceptScore W1891489613C78336883 @default.
• W1891489613 hasConceptScore W1891489613C78519656 @default.
• W1891489613 hasIssue "1" @default.
• W1891489613 hasLocation W18914896131 @default.
• W1891489613 hasOpenAccess W1891489613 @default.
• W1891489613 hasPrimaryLocation W18914896131 @default.
• W1891489613 hasRelatedWork W13248295 @default.
• W1891489613 hasRelatedWork W1516154158 @default.
• W1891489613 hasRelatedWork W1575469961 @default.
• W1891489613 hasRelatedWork W1582644700 @default.
• W1891489613 hasRelatedWork W1656579522 @default.
• W1891489613 hasRelatedWork W1701457563 @default.
• W1891489613 hasRelatedWork W1842522659 @default.
• W1891489613 hasRelatedWork W1921453518 @default.
• W1891489613 hasRelatedWork W1940673102 @default.
• W1891489613 hasRelatedWork W1952526481 @default.
• W1891489613 hasRelatedWork W2026978501 @default.
• W1891489613 hasRelatedWork W2056252022 @default.
• W1891489613 hasRelatedWork W2058556549 @default.
• W1891489613 hasRelatedWork W2076157443 @default.
• W1891489613 hasRelatedWork W2106247597 @default.
• W1891489613 hasRelatedWork W2117696358 @default.
• W1891489613 hasRelatedWork W21287259 @default.
• W1891489613 hasRelatedWork W2156939292 @default.
• W1891489613 hasRelatedWork W2349322652 @default.
• W1891489613 hasRelatedWork W2544219934 @default.
• W1891489613 hasVolume "18" @default.
• W1891489613 isParatext "false" @default.
• W1891489613 isRetracted "false" @default.
• W1891489613 magId "1891489613" @default.
• W1891489613 workType "article" @default.