Slot Dipol AKA Sputnik Lite

[Dr. Pepper 48]

Harry36 provided a slot dipole as an antenna for drones:

I designed a similar antenna for 1.7 to 2.7 GHz which gives a good gain and low swr over the communication band. Somewhere here or on Lan23 i see a picture of something similar with slots at the end so i also used them. For everyone who wants to recalculate such an antenna you will find the cst file below. I think for its simplicity it performs very well. 

 

Size:

Spoiler

 

CST

slot antenna max band.cst

[Admin 2299]

,,, is a copy of Petra20...

 

[Dr. Pepper 48]

Yes this was the picture i have in mind. Thanks for the hint

[Dr. Pepper 48]

An improved version of the slot dipole with wings. Good broadband behavior and good gain.  1.7 - 2.7 GHz with SWR <1.3, Gain from 2.1 - 2.5 GHz > 13 dBi

[Dr. Pepper 48]

And additional a variant with directors. They harmonize good with the design but they give only a slight improvement.

[didy 0]

Hello Can you please put the dimensions in lambda so that it is easy to build for other frequencies as well? In fact, this request would be general on the forum. Maybe the admin will stick it.

Thanks

[Admin 2299]

,,, it is possible, but a medium (center) frequency must be chosen...!!!

[Dr. Pepper 48]

then its necessary to analyze the structure and look which parameter is related to lamda and which is perhaps related to other factors. And yes you have to find a center frequency. For a single band antenna this is easy for such a multiband its much trial and error i think. For me its easier to re-optimize the design for another frequency range. For lower frequency's there should be better designs that are not so big, the only other range i can imagine is in the 5GHz region but there you not need such a wide bandwith. 

 

Attached you will find the cst file, feel free to recalculate it for another freq. range or to find the lambda depending parameters ;-)

slot antenna 17-27-reflectors.cst

[Admin 2299]

,,,it is still possible...!!!

slot patch.cst

[Dr. Pepper 48]

You are a real master 

[Dr. Pepper 48]

The slot dipole with V cut outs like an batwing antenna, not as good for broadband application but a little more compact than the slot dipole and a good gainer. Here an example for a wifi antenna

slot antenna with V 24-25.cst

[Harry36 132]

19 hours ago, Dr. Pepper said:

The slot dipole with V cut outs like an batwing antenna, not as good for broadband application but a little more compact than the slot dipole and a good gainer. Here an example for a wifi antenna

Try to draw a balancing device in the model.