Coaxial collinear element array antenna

Details Coaxial collinear element array antenna Coaxial collinear element array antenna

H - Electricity

01

Q

H01Q 21/00 (2006.01) H01Q 11/16 (2006.01) H01Q 21/10 (2006.01)

Patent

CA 2142695

2142695 9406170 PCTABS00030 An array of collinear coaxial lines (11, 13) utilizes standard size brass tubing (23c, 24c) with brass rods (23a, 24a) inserted therein to establish each half-wavelength coaxial section. A coupler (20) positioned between each half-wavelength section has outer conductor supports (20b, 20c) and through passages (20d, 20e) for the inner conductor. Inner conductors (23a, 24a) of the transmission line elements (23, 24) are soldered to the outer conductors (23c, 24c) 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.

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