1090MHz Antenna

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CoCo Antenna - 2, 4, 6, 8 & 12 Elements - Simulation Results

Simulation results show that CoCo is a High Gain, High Impedance/High SWR Antenna. Due to its high SWR, an impedance matching device is required to be incorporated in the feed coax (i.e. between CoCo and Receiver) to bring down SWR to 1.5 or less, in order to fully utilize the high gain of CoCo. [image] 2-ELEMENTS [image] 4-ELEMENTS [image] 6-ELEMENTS [image] 8-ELEMENTS [image] 12-ELEMENTS [image] .

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Coaxial Collinear (CoCo) Antenna - Hyps & Facts.

There are lot of common beliefs about making a Coaxial Collinear antenna. Some of these are real, while others are either imagination or over blown facts. I decided to start this thread to find out the truth. I invite all members who are good in theoretical knowledge, or have good measurement skills & equipment, or have made a DIY CoCo and have good/bad experience of making their CoCo to contribute their views. As a first attempt, I ran a simulation of 8-Element CoCo made of coax having VF=0.83…