. The Bell System technical journal . NRF) which isdefined as the ratio of the total noise current received from the antennain question to that received from a vertical antenna under the condi-tions of continuous, constant distribution of noise sources about theantenna and of equal output currents for signals from the directionof maximum receptivity. The back end NRF is the noise receptionfactor for the arc between 90 degrees and 270 degrees from the direc-tion of maximum receptivity. On this basis, the choice rests quite unmistakably with the wave-antenna. 2. Transmission-Frequency Characteri
. The Bell System technical journal . NRF) which isdefined as the ratio of the total noise current received from the antennain question to that received from a vertical antenna under the condi-tions of continuous, constant distribution of noise sources about theantenna and of equal output currents for signals from the directionof maximum receptivity. The back end NRF is the noise receptionfactor for the arc between 90 degrees and 270 degrees from the direc-tion of maximum receptivity. On this basis, the choice rests quite unmistakably with the wave-antenna. 2. Transmission-Frequency Characteristic. Since the receiving an-tenna is to be used on a system for communication by speech, necessi- ^* H. H. Beverage, C. W. Rice and E, W. Kellog, The Wave Antenna, I. E. E., 42, 215; 1923. TRANSATLANTIC RADIO TELEPHONY 319 tating the transmission of a relatively wide band of frequencies, it mustpass such a band without undue discrimination against any frequencycontained therein. To utilize the vertical and the loop antennas. Vertical AntennaTotal = End = 3 330^^^^ ?\ 300^/ /^ l/ ^ ^ X60» 24oV^ ^n/ r) /l20 2io^\^];;;--- .J^O Loop AntennaTotal = =
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