W. Marshall Leach

Learn More
A new method is developed for determining the f a r field pattern of an antenna from probe compensated near-field measurements over the surface of a right circular cylinder enclosing the antenna. The method is derived by first expanding both the field radiated by the antenna and the field radiated by the measurement probe, when it is used as a transmitter,(More)
In an earlier study (10), it was shown that exogenous thymidine is incorporated into a precursor "pool" during the period between deoxyribonucleic acid (DNA) syntheses. The possibility was not examined, however, that the ability of cells to incorporate thymidine into the pool varied with the mitotic stage at the time of exposure. Available evidence(More)
Male CBA/CAY mice were exposed daily (6 days a week) for 30 minutes in an environmentally controlled waveguide to continuous 2.45 GHz microwave radiation for 2 weeks at average whole body absorbed dose rates of 0.05, 0.5, 10, and 20 mW/g. Shan exposed animals served as controls. Chain translocations were observed at diakinesis at metaphase I in microwave(More)
From a single transient test we determine all of the parameters of a vented—box loudspeaker system. A complete electroacoustical circuit representation is thus obtained from the time— domain test using digital signal processing techniques. First, we apply the pencil—of—functions technique [5] to the digitally recorded response and determine the(More)