More at BuildingYagiAntennas. Also see the MicroTVAerial and the legendary PringlesCantenna.

Stamp design

15 dBi Yagi.

More information at http://www.paramowifix.net/antenas/yagi/yagi_plana.html 15dbi.

http://seattlewireless.net/images/uploaded/23262.994915022.gif

connection detail

http://seattlewireless.net/images/uploaded/23750.994919502.gif

Plastic Rod with Pins design

http://www.seattlewireless.net/images/uploaded/5187.1035080391.jpg

http://www.seattlewireless.net/images/uploaded/5389.1035081093.jpg

You've seen these around before. They seem to be rebranded by just about every company that sells anything to do with wireless. This is an early design (i.e. not made so cheap that it's all stamped out of one piece of metal, which would be rather hard to reproduce). Instead it's like the "Barbie's TV Antenna" further down the page, but only it's the real deal.

It's 15dbi, and I estimate for $10, some scrap parts, and a bit of time you too can have a 15dbi yagi.

Want to make your very own? It's quite easy. Exact dimensions and other info at http://www.andrewhakman.dhs.org/yagi

I'd put the whole thing here, but I already made a little webpage, and it's easier to link rather than recreate.

Here's a small preview of the detailed specs at my site. http://www.seattlewireless.net/images/uploaded/5436.1035081185.jpg

Here is the data file and computed radiation pattern from W9CF's java app:

HackmanYagi from http://www.andrewhakman.dhs.org/yagi/ # Title

Millimeters # length units

absolute #spacing

10 #segments for 1/2 element

16 #number of elements

2 #driven element

3.3 #element diameter

60.3 #length 1

50.0 #length 2

50.8 #length 3

49.2 #length 4

48.3 #length 5

45.8 #length 6

45.8 #length 7

45.8 #length 8

45.8 #length 9

45.8 #length 10

45.8 #length 11

44.2 #length 12

44.2 #length 13

44.2 #length 14

44.2 #length 15

44.2 #length 16

0.0 #position 1

15.65 #position 2

37.0 #position 3

62.5 #position 4

89.7 #position 5

123.4 #position 6

150.4 #position 7

177.4 #position 8

204.4 #position 9

231.4 #position 10

258.4 #position 11

285.4 #position 12

312.4 #position 13

339.4 #position 14

366.4 #position 15

393.4 #position 16

2437.0 #frequency

http://seattlewireless.net/images/uploaded/98644.1118643789.png

If you wish to tune this for a different element diameter (e.g. 2.03 mm for 12AWG copper wire), or optimize for a specific wireless channel, the W9CF yagi modeler will help you. The W9CF computed impedance (Zin) at the driving element is not corrected for the folded dipole driver and should be multiplied by 4 to estimate the final impedance. YMMV.

Home made 15dbi Loop Uda Yagi (Spanish)

http://www.paramowifix.net/antenas/loop_uda_yagi/index.html

http://www.caldevilla.net/paramowifix/imagenes/0101bis.jpg

Barbie's TV Antenna

MicroTVAerial

http://www.seattlewireless.net/images/uploaded/12086.1020725949.jpg

The pictured one is 15dbi, it's about 3ft long and will cover a pretty good distance. What makes this one interesting is the design. it's dead simple to implement and doesn't require punching.

Without Mounting Kit.

http://www.seattlewireless.net/images/gear/DirectionalYagi.jpg

Really simple design. uses a bolt, some aluminum piping and washers. end pieces are fit to the enclosure.

http://www.seattlewireless.net/images/gear/DirectionalYagi01.jpg

The reflector is about the size of a soup can with an N Female flushmount and some extra copper or brass piping.

http://www.seattlewireless.net/images/gear/DirectionalYagi02.jpg

piping doesn't actually touch the bolt!

http://www.seattlewireless.net/images/gear/DirectionalYagi03.jpg

Nice N connector eh?

http://www.seattlewireless.net/images/gear/DirectionalYagi04.jpg

You can find the dimensions for this antenna here: DimensionAntenna

More foto:

http://7keys.com.pl/images/photoalbum/17.jpg http://7keys.com.pl/images/photoalbum/15.jpg http://7keys.com.pl/images/photoalbum/14.jpg


DirectionalYagi (last edited 2013-11-16 09:54:27 by JasonMcArthur)