Magnetic probe factor with consideration of probe tilt for near-field measurement
This paper presents a frequency and space dependent analytical model of near-field magnetic probe factor with probe tilt angle for measuring electromagnetic emissions. The principle and derivation of the probe factor are elucidated. The vector-network-analyzer (VNA) measurement of the probe factor is also introduced. The correlation between the measured and calculated probe factors is finally demonstrated.
A three-loop antenna system for performing near-field measurements of electric and magnetic fields from video display terminals
This paper discusses the use of a three-loop antenna system (TLAS) for near-field measurement of electric and magnetic fields from video display terminals (VDTs). We calculated the electric and magnetic dipole moments to derive the electric and magnetic field patterns in the near field region. Electric and magnetic fields, emitted by several different models of VDTs, were evaluated with the TLAS and were compared with those measured by conventional electric and magnetic field probes at different distances and directions from VDTs. A good correlation (/spl plusmn/1.6 dB) between the two measurement techniques was found. This agreement is within the accuracy (/spl plusmn/2 dB) of the conventional field probe measurements.
The genus Pseudolithophyllum (Corallinaceae) in the Gulf of Maine
SummaryThis is the third of a series of papers covering the anatomy, morphology, systematics and ecology of the crustose corallines of the Gulf of Maine. Pseudolithophyllum orbiculatum, the only species of this genus in the region, is treated in this paper.