Rod antenna

Communications: radio wave antennas – Antennas – Rod type

Patent

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Details

343715, H01Q 110

Patent

active

049566474

ABSTRACT:
A rod antenna including a plurality of rods of respectively different diameters which are coupled with each other in a manner to be slidable. Each of the larger diameter rods is provided with a rectangular strip of film made of resin such that it is mounted in a ring shape at least at the inside joint area for coupling the larger diameter rod with the smaller diameter rod. The rod antenna can be low in cost since the cutting process done for the conventional antennas is eliminated, and the rectangular film strip is inexpensive and can be easily mounted. Besides, a satisfactory waterproofing can be obtained as the rectangular strip of film is excellent in heat resistance, cold resistance, water repellency, wear resistance, etc. Furthermore, the operating noise of rods during the extension or retraction of the antenna is low and the appearance of the rod can be kept clean.

REFERENCES:
patent: 2173095 (1939-09-01), Byrne
patent: 2914922 (1959-12-01), Gibson
patent: 3042416 (1962-07-01), Paluszkiewicz et al.
patent: 3419876 (1968-12-01), Edwards et al.
patent: 3688455 (1972-09-01), Zebuhr
patent: 4041498 (1977-08-01), Freimark et al.
patent: 4137535 (1979-01-01), Rupprecht
patent: 4353075 (1982-10-01), Edwards
patent: 4406469 (1983-09-01), Allison
patent: 4542383 (1985-09-01), Cusey et al.
patent: 4577872 (1986-03-01), Bake et al.

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