Attenuation Constant of Lunar Line and T-Septate Lunar Line

Abstract

The attenuation constant /spl alpha/ of the lunar line and that of the T-septate lunar line were derived from the average power loss W/sub L/ and the average power transfer W/sub T/ in each line, that is the ratio, W/sub L//2W/sub T/. The average power loss and the average power transfer for the lunar line and for the T-septate lunar line were derived from their respective field functions. The theoretical attenuation constant of a typical lunar line is less than 0.7 db/ 100 ft for frequencies greater than 2000 Mc. The theoretical attenuation constant of a typical T-septate line is less than 0.9 db/ 100 f t for frequencies greater than 1000 Mc. Experimental measurements of the attenuation constant of a T-septate lunar line agree with the theoretical value. In the 200 to 2000 Mc frequency band, the lunar line and the T-septate lunar line offer a compact and light package without an appreciable sacrifice in peak power handling capacity or attenuation.