Short Backfire Antenna on 5,6 GHz

[Admin 2545]

 I was looking for a design that promised reasonable gain without excessive size. The short backfire antenna is not a common antenna, promised 20dBi and looked easy to build. Several designs were found and analysed which did reveal a few discrepancies which seem now that been resolved. 

A quick look at the finished antenna shows a 'cake tin' style base fed with a elliptical patch as vibrator and a waveguide as sub-reflector.
 

 

[u0m3 0]

Nice alternative for a DIY parabolic reflector! Could you provide a cross-section view? Or some ratios for distances?

[Admin 2545]

,,,thanks buddy,
but it must to know that the antenna is big enough and can not adapt to a parabolic reflector,,,!!!

It has a diameter of about 258mm

[pragata.my.id 25]

amazing

[pragata.my.id 25]

как насчет графика VSWR? этот дизайн мне тоже нравится.

What about the VSWR schedule? I also like this design.

[pragata.my.id 25]

DIY... 

[didy 0]

On 27.08.2017 at 10:05 PM, Admin said:

,,,thanks buddy,
but it must to know that the antenna is big enough and can not adapt to a parabolic reflector,,,!!!

It has a diameter of about 258mm

Hello !

Do you have a dimensional drawing for this type of antenna?

[Admin 2545]

,,,hy dude..!!!

 I do not know, simulation is long  time ago ...!!!

[Admin 2545]

,,,Yes, but this small antenna (116mm diameter) can be used in the focus of a parabolic offset...

[Admin 2545]

Good, these are the dimensions on the SBF antenna above,,,

,,,and the simulations...