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The propagation and radiation characteristics of the tape helix with a conducting core and dielectric substrate have been investigated previously. The analysis techniques developed earlier either assume that the helix is infinite in extent or is being end-fed. In this paper, we consider a center-fed helical microstrip antenna of finite length. The(More)
Fractal arrays utilize irregular spacing of antenna elements. The nonuniformity of the array causes variations in element coupling when compared to a uniform array of comparable size. Non-uniform coupling has a great effect on the input impedance of the elements, which in turn, has a great effect on the individual element patterns. The paper presents the(More)
In Fig. 3 we see that both Miller and Kihuchi find appreciable photostar yields at the assumed threshold of 148 Mev. Kikuchi's data rise more rapidly than the predictions of the mechanism of Sec. II. ) =4&&10—"cm and ) =8X10 " cm predict approximately the same values of S(E). Miller has evaluated S(E) for two groups of emulsion elements by potential barrier(More)
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