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Consumer Reports is a United States-based non-profit organization which conducts product testing and product research to collect information to share with consumers so that they can make more informed purchase decisions in any marketplace.
The antennas contained in mobile phones, including smartphones, emit radiofrequency (RF) radiation (non-ionizing "radio waves" such as microwaves); the parts of the head or body nearest to the antenna can absorb this energy and convert it to heat or to synchronised molecular vibrations (the term 'heat', properly applies only to disordered molecular motion).
The antenna may not be more than 20 feet (6.1 m) above the highest point of the structure it is mounted to, or the highest point of the antenna must not be more than 60 feet (18.3 m) above the ground (47 CFR 95.408(c)) if installed in a fixed location. [4] CB radios must include AM or SSB modulation and may include frequency modulation. [5]
Furthermore, group 2B only indicates a credible association between disease and exposure but does not rule out confounding effects with reasonable confidence. A causal relationship has yet to be established. [11] Epidemiological studies look for statistical correlations between EM exposure in the field and specific health effects.
Consumer Reports states that PriceGrabber places the ads and pays a percentage of referral fees to CR, [25] who has no direct relationship with the retailers. [26] Consumer Reports publishes reviews of its business partner and recommends it in at least one case. [27]
Dipole gain is the ratio of the power density received from the antenna in the direction of its maximum radiation to the power density , received from a lossless half-wave dipole antenna in the direction of its maximum radiation = , The decibel gain relative to a dipole (dB d) is given by = ( , )
Antenna measurement techniques refers to the testing of antennas in order to ensure that the antenna meets specifications or simply to characterize it. Typical antenna parameters are gain , bandwidth , radiation pattern , beamwidth , polarization , impedance ; These are imperative communicative means.
Rarely, both dipoles and monopoles are called electric antennas, [citation needed] since they interact with the electric field of a radio wave, to contrast them against all sizes of loops, which are correspondingly magnetic antennas. [b] One side of the feedline from the receiver or transmitter is connected to the radiating arm of the antenna ...
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