Dielectric rod antenna

Details Dielectric rod antenna Dielectric rod antenna

1997-10-17

1999-08-10

Wong, Don

Communications: radio wave antennas

Antennas

Wave guide type

343901, 343903, H01Q 1300

Patent

active

059365897

ABSTRACT:
A dielectric rod antenna has a dielectric rod and a waveguide which receives one end of the dielectric rod to excite the dielectric rod. The dielectric rod is divided along its length into at least two sections including a hollow tubular dielectric sleeve and a dielectric internal rod telescopically received and secured in the hollow of the dielectric sleeve. One end of the dielectric internal rod makes a releasable-fit engagement with the adjacent end of the dielectric sleeve so that the overall length of the antenna can be fixed against change during the use. The overall radius and the hollow radius of the dielectric sleeve and the overall radius of the dielectric internal rod are determined such that the propagation constant in the dielectric sleeve and the propagation constant in the dielectric internal rod are equalized to each other. The end of the dielectric internal rod adjacent to the dielectric sleeve is tapered so as to converge towards the end extremity.

REFERENCES:
patent: H000584 (1989-02-01), Schwering et al.
patent: 3128467 (1964-04-01), Lanctot
"Dielectric Antenna", Yohei Ishikawa, Patents Abstracts of Japan, E-945, Jun. 27, 1990, vol. 14, No. 297.
"Dielektrische Richstrahler", Teil I. Stielstrahler, Fernmeldetechnische Zeitschrift, Jahrg. 2, Heft 2, Feb. 1949.

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