Tape wound helical antenna

Here is just another way to make a helical antenna. Cheap and easy.  Aluminum sheet reflector, cardboard tube and self-adhesive copper tape. Designed and tuned for 1240MHz this helical has 8 turns on a 85mm diameter tube.

Cardboard helical 2 Cardboard helical 1Cardboard helical 3

Update:

Added some eye-candy after flight testing. Performance is excellent. No difference to the wire wound helical I built earlier..

Tape wound helical 4

4 thoughts on “Tape wound helical antenna

  1. Good job. Hast du die simuliert? Wie dick ist das kupferband?

    wenn mein neuer vna/sna kommt moecht ich nen array bauen… mal gucken wie s wird. jetzt erst mal n neuer tracker…

    • Ich habe ein Modell derzeit in CST aber aufgrund der Größe läuft die Simulation ein paar Tage durch für genaue Ergebnisse.

      Das Band ist 1/4″ breit. Dicke weis ich nicht mehr, aber wie normales Tape.

  2. Hi Michael

    I came across your website whilst looking for information as to how to construct a 2.4GHz helical antenna. I specifically was interested as to whether copper tape could be used. I would like to construct one using 40mm nominal cardboard tube (actual OD 42mm) and self adhesive copper tape from HobbyKing.

    http://www.hobbyking.com/hobbyking/store/__94617__Self_Adhesive_Copper_Tape_0_09_x_3mm_50Meters_.html

    My dimensions are based on those outlined by IBCrazy.

    http://www.rcgroups.com/forums/showpost.php?p=17202506&postcount=4

    I was thinking of scaling the reflector to the forma/support. I’d be interested in your thoughts.

    Cheers

    Jase 🙂

    • A tape wound helical will work. Dimensions can be the same as for wire wound. Tuning to the frequency of interest can be done with the matching method of your choice. Some measurement equipment is recommended for this. The reflector radius shall be at least 1/4 lambda + tube radius. A bigger reflector is fine and increases the front/back ratio.

      What I noticed on my tape wound helical, compared to the wire wound, is that even with same reflector size the front/back ration is better on the tape wound. This means when you fly behind the antenna you will loose signal earlier, keep that in mind.

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