dualband collinear

Dualband-Beam 12/17 m - The beam has only one feedpoint with 50 Ohm and has an open-sleeve element for 12 m by DK7ZB

The Cycloid Collinear, a CP Omni - This paper describes a wide band, high gain, multi-element cp omni with a single 50 ohm feedpoint with instructions for building a 2 and half element cycloid collinear for 2 meters.

Dual Band Vertical On Autopilot - A good 20 & 40 meter dual band vertical using a novel tuning method that provides automatic band switching.

Build A 9dB, 70cm Collinear Antenna  ^pop - 70cm, Collinear Antenna From Coax

Directional arrays - About collinear array antennas

Definition of Collinear antenna array - Wikipedia page about collinear antenna arrays

M3FVB VHF 8db collinear  ^{updated  pop} - Build a 2m 8db collinear for portable use

Build a 2.4GHz Vertical antenna  ^pop - Building a 2.4GHz vertical collinear omnidirectional antenna

Half wave collinear copper jpole - Two meters collinear j-pole antennas made with riggid copper pipe

5/8 Collinear antenna  ^pop - A 5/8 wave stacked j-pole antenna plan

Design your Own Super J Pole  ^updated - Javascript for calculating the lengths of tubing to be used for the construction of a Super J-Pole in a collinear design

The Simple Collinear - Wherever there is a need for a vertically polarized omni-directional antenna with gain, a collinear is used. The vertically polarized collinear takes the form of two or more half waves in-line and in-phase, resulting in an omni-directional pattern with maximum radiation near the horizon.

Omni-Gain Vertical Collinear Antenna - This rugged antenna, an omnidirectional collinear, is capable of surviving harsh environments. It's a good choice for repeater installations and can be top, or side mounted to the tower by WA6SVT

802.11 2.4Ghz Low-Power Vertical Antenna - A 2.4Ghz low-power 5dBi vertical collinear antenna for 802.11 applications

Home-brew Compact 6dBi Collinear Antenna  ^pop - This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802.11b/g wireless networking.

Collinear Microstrip Patch Antenna - Design of a 869 Mhz Collinear antenna

VHF/UHF Wideband Portable Dipole - A portable dualband dipole robust and compact antenna usable for horizontal and vertical polarisation by ON6MU

Dualband EH Antenna - A detailed project of a dual band EH antenna by F5IXU in french

An improved 40-80 double extended zepp - Article originally published in ARRL compendium by N6LF revisits the classic double extended Zepp to improve pattern and SWR bandwidth. The DEZepp is essentially two end-fed collinear dipoles.

Copper Cactus J pole 2 metter 70 Cm dualband - Homebrew j-pole 2mt 70 cm antenna project. Make it cheap.

BiQuad Antenna for 144/440 - This is a vertically polarized Broadside and Collinear Array each Loop is a vertically polarized Broadside Array both the right and the left side of the Loop is a bent 1/2 wave dipole working 180 degrees out of phase with the other one and that gives you 4.15dbi of gain by KE4UYP

144/430 dualband J-Pole antenna - A simple and cheap dualband j-pole antenna for 144 and 430 MHz

Copper Cactus Dual-Band - Copper Cactus Dual-Band Super J-Pole Antenna Project 2 meter 70 Cm Home brew antenna

WiFI Collinear antenna - Pictures and homebrew instructions for this collinear 2.4 Ghz antenna

Telewave - Telewave's innovative engineering produces the industry's toughest antenna systems. Yagi, Fiberglass Collinear, and Dipole models are available from 66-2500 MHz. Wattmeters, test equipment,rf power meters, duplexers, filters and cavities, transmitters combiners