Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

PROPAGATION CHARACTERISTICS 97When R is large compared to one, (5) becomes:/ = F c + Fd cos pia2 sin — Fj9A'cos (pi + ~j cos issinf p< + y)-'4•(S )By an application of the addition formulas for the sine and cosine, togetherwith the Besscl function expansions for cos (x sin )and sin (x sin$) and the recurrence formulas for J„(x), (8) may be transformed intothe following:f = F, + Fj cos pta2F„, cos —o rRcos/3-j £ (2« + l)./ : „ +1 (-) cos (2» + l)(/;/+-0j-sin 0-j Y. 2nJ in sin 2// Pt + ^~)\ (0)Thus when