0
$\begingroup$

How should I start if I want to design a compact antenna for 2 meter band using the principle of meander antenna? I noticed meander antennas are frequently used in mobile devices and notebooks for 2.4 and 5.5 GHz devices (Bluetooth, Wifi) as well as various kinds of mobile phones.

I would like to get to something, preferably flat or pen-shaped, and I wanted to try meander antenna because they are reportedly the most efficient radiators with regard to their small physical dimensions.

$\endgroup$
  • 1
    $\begingroup$ do you have a reference design ? please update your question with a link or formulas/drawing/picture. Do you have a particular problem with that design, or a question about that particular design ? please update your question. The more detail about what you are asking, the better the answers will be $\endgroup$ – Edwin van Mierlo Feb 23 '18 at 13:38
  • $\begingroup$ See this question. $\endgroup$ – Mike Waters Feb 23 '18 at 16:26
  • $\begingroup$ This is not a precisely defined design. Rather an interesting idea for experiment. The original inspiration came from HF meander antennas (physically short antenna for impractically long wavelength for a "normal" dipole or vertical), but BT and wifi antennas inspired me to try to build something flat, maybe on a piece of PCB, but for much lower frequencies (2m or 70 cm) and make it usable in restricted conditions, e.g. on a window. $\endgroup$ – Jindrich Vavruska OK4RM Feb 24 '18 at 21:30
  • $\begingroup$ @JindrichVavruska Please don't add signatures to your posts. If you want, you can put your call sign in your display name or about me section in your profile. $\endgroup$ – Kevin Reid AG6YO Feb 24 '18 at 23:01
2
$\begingroup$
  1. Start with a straight dipole or monopole
  2. Put kinks in it
  3. Add or subtract length as necessary

It usually ends up somewhere between 50% to 60% of the straight-wire length.

You could find the appropriate length by modelling or trial and error. KK4OBI has a chart which will get you close.

Although if you want something pen-shaped, the typical "rubber-ducky" antenna that comes with most mobile radios is a wire wound in a helix, which could be described as a "helical meander antenna", or an antenna that meanders in three dimensions instead of two. The reason they aren't used more frequently in consumer electronics is they can't be printed on a PCB. I doubt you will find much difference in performance between a meander antenna and a helical antenna of similar size.

$\endgroup$
  • $\begingroup$ Yep, thanks. I am now kind of struggling with 4nec2 (having used it for a long time... forgot how to create a new file, it's not in menu...) Hopefully I will be able to create the design. I'd actually prefer something flat rather than barrel shape. I think rubber-duckies work fine for their shape, this would be an attempt to get something not too big and yet maybe a little bit more efficient. $\endgroup$ – Jindrich Vavruska OK4RM Feb 24 '18 at 21:36
1
$\begingroup$

I think the easiest way is to start with a working design (Google is full of it) for an other band and upscale (or downscale) it for the 2m band.

$\endgroup$
  • 1
    $\begingroup$ Thanks, actually scaling a 2.4 GHz PCB design up to 430 or 145 MHz might work. $\endgroup$ – Jindrich Vavruska OK4RM Feb 24 '18 at 21:36

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.