Collinear
Collinear antennas
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A 5/8 wave stacked j-pole antenna plan -
Building details of a VHF colinear antenna with 6 db gain -
This is an short description on how to make a cheap omni antenna for 802.11 wireless LAN cards. -
This project is about a cheap way of building a colinear antenna for VHF 145MHz, and having about 10dB more gain than that little 1/4-wave magmount -
Building a 2.4GHz vertical collinear omnidirectional antenna -
70cm, Collinear Antenna From Coax -
Wikipedia page about collinear antenna arrays -
Javascript for calculating the lengths of tubing to be used for the construction of a Super J-Pole in a collinear design -
About collinear array antennas -
This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802.11b/g wireless networking. -
A simple 6dBi Collinear Antenna for LoRa compared to the Lorank8 gateway default antenna. -
Build a 2m 8db collinear for portable use -
One popular rumor or thought is that antenna gain doubles every time we double the number of elements -
2 m. Band VHF Collinear with 2 Dipoles by sv1bsx -
This page offers an online antenna designer tool for Hams to calculate the dimensions needed to construct a coaxial collinear antenna for a specific frequency. It provides guidance on the required frequency input, coax velocity factor, and element measurements for optimal performance. The tool is recommended for experienced antenna builders due to its complexity and technical requirements. Users can input the frequency in MHz and the tool will generate the necessary dimensions based on the chosen parameters. The page emphasizes the importance of accurate measurements and connections for successful antenna construction. -
An interesting article about co-linear or collinear antenna building, by Karl Shoemaker, AK2O -
The collinear antenna, or Marconi-Franklin antenna, is an omnidirectional, high-gain antenna composed of in-phase half-wave dipoles aligned vertically. By using quarter-wave transmission line segments, it maximizes gain at a low horizon angle, outperforming a half-wave dipole. Adding segments increases gain but narrows bandwidth. A popular DIY version, the CoCo antenna, uses half-wave coaxial cable segments connected by non-radiating transmission lines. Built with stable velocity factor cables, a matching quarter-wave sleeve balun, and ferrite rings for attenuation, the antenna achieves performance comparable to commercial models. -
This page offers an online antenna designer to calculate the dimensions for a collinear dipole antenna at a specified frequency. The collinear dipole antenna is constructed with multiple 1/2 wavelength sections separated by a 1/4 wave phasing stub in the form of a coil. It requires a ground-plane to operate and can be used for both receiving and transmitting purposes. The antenna can be made from common copper wire, with thicker wire providing a wider bandwidth. The calculations are based on radio waves traveling at the speed of light. Ideal for ham radio operators looking to build their own antenna for improved reception and transmission.