This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802.11b/g wireless networking. The antenna is very robust and compact, and has a gain of approximately 5-6dBi
post 24 Dec 2021
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Wire collinear for 2 meters
values indicated are calculated based on the excel program at 146 MHz design point adjust desired frequency for lowest swr
Collinear 5/8 wave omni 2 meters
the upper section is about 5/8 wavelength. the lower section can be a 1/4-wavelength or 5/8-wavelength monopole--with and without radials in commercial implementations--or even a 1/2-wavelength dipole
Antena Multibanda Colinear para HF
2-element 1/2 wave collinear J-Pole performed we fabricated two identical J-Poles using the dimensions in this document, and both of them performed quite well, with a resonant frequency toward the lower end of the 2-meter Amateur band and a VSWR of 1.5:1 or better over the entire band
Directional arrays
The pattern radiated by the collinear array is similar to that produced by a single dipole. The addition of the second radiator, however, tends to intensify the pattern
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values indicated are calculated based on the excel program at 146 MHz design point adjust desired frequency for lowest swr
the upper section is about 5/8 wavelength. the lower section can be a 1/4-wavelength or 5/8-wavelength monopole--with and without radials in commercial implementations--or even a 1/2-wavelength dipole
2-element 1/2 wave collinear J-Pole performed we fabricated two identical J-Poles using the dimensions in this document, and both of them performed quite well, with a resonant frequency toward the lower end of the 2-meter Amateur band and a VSWR of 1.5:1 or better over the entire band
The pattern radiated by the collinear array is similar to that produced by a single dipole. The addition of the second radiator, however, tends to intensify the pattern
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