NVIS

This Near vertical incidence skywave antenna was made for me by PA0ABG.

N V I S setup diagram — NVIS setup diagram

A FR-4 PCB is used. Half of it was scraped off for this design.

N V I S P C B scrape — NVIS PCB scrape

N V I S P C B — NVIS PCB

N V I S P C B liquid tape — NVIS PCB liquid tape

N V I S coax connector — NVIS coax connector

N V I S P C B — NVIS PCB

The antenne wires, coiled on a piece of pipe.

N V I S wire coils — NVIS wire coils

Diagrams

Some 3d plots of this antenna on 10, 17, 20, 40 and 80 meters made with EZNEC software by PA0ABG. The antenna is most effective on 20, 40 and 80 meters, where the waves go upwards.

N V I S 10 meter 28 mega hertz diagram top — NVIS 10 meter 28 mega hertz diagram top

N V I S 10 meter 28 mega hertz diagram side — NVIS 10 meter 28 mega hertz diagram side

N V I S 17 meter 18 mega hertz diagram — NVIS 17 meter 18 mega hertz diagram

N V I S 20 meter 14 mega hertz diagram — NVIS 20 meter 14 mega hertz diagram

N V I S 20 meter 14 mega hertz diagram — NVIS 20 meter 14 mega hertz diagram

N V I S 40 meter 7 mega hertz diagram — NVIS 40 meter 7 mega hertz diagram

N V I S 80 meter 3.5 mega hertz diagram — NVIS 80 meter 3.5 mega hertz diagram

The antenna deployed in the field.

N V I S antenna — NVIS antenna

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