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Dr. Pepper

Slot Dipol AKA Sputnik Lite

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. 

Slot max band.png

 

Size:

Spoiler

size.png

 

CST

slot antenna max band.cst

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,,, is a copy of Petra20...

 

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

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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

overwiev.png

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

Overview-2.png

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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

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

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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

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You are a real master B|

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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

overwiev2.png

slot antenna with V 24-25.cst

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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.

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