Coaxial collinear element array antenna

Details Coaxial collinear element array antenna Coaxial collinear element array antenna

1992-09-02

1994-02-08

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Active sleeve surrounds feed line

343792, 343878, 343905, H01Q 116

Patent

active

052852113

ABSTRACT:
An array of collinear coaxial lines utilizes standard size brass tubing with brass rods inserted therein to establish each half-wavelength coaxial section. A coupler positioned between each half-wavelength section has an outer conductor supports and through passages for the inner conductor. Inner conductors of the transmission line elements are soldered to the outer conductors of the respective adjacent transmission line elements so that all elements are excited with the same phase and polarity. Air dielectric between the inner and outer conductors provides a transmission line wavelength equal to that of free space so that the length of each element in the array is a free space half-wavelength long, thereby providing an antenna gain greater than that achievable with transmission lines having solid dielectric supporting the inner conductor.

REFERENCES:
patent: 2115761 (1938-05-01), Blumlein
patent: 2483240 (1949-09-01), Shanklin

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