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Shabra

What is the type of antenna?

Backfiring circular patch (CHINISHIT) 

NOBODY ever got more than 27 -28 dbi at those frequencies (800 mhz to 2700 mhz )

you'll need more than 2 meters diameter to get over 30 dbi ...

ALL lies and good looks

Edited by clanon
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MagnetoElectric Dipole (MED) more bandwidth , less gain and low efficiency on Dielectric  ( ALL metal should be better)

PS : and the TUBE DIAMETER doesn't help...either

Edited by clanon

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On 16.09.2021 at 4:58 PM, clanon said:

MagnetoElectric Dipole (MED) more bandwidth , less gain and low efficiency on Dielectric  ( ALL metal should be better)

PS : and the TUBE DIAMETER doesn't help...either

I don't know the design of the patch so that it can cover the 1700-2700 range in MIMO mode with simple powering. With the help of dipoles, this is done easily. IMHO, to expand the strip, you will need another structural element, it is either not shown in the photo, or the dishonest manufacturer did not install it, but PCB racks are used for a reason. For f / D ratios 0.25 to 0.3, you don't need a lot of directivity, 6-8 dBi is enough. the design is quite technologically advanced in production. If you look closely at the photo, you will see the TJD-1727 marking, but the frequencies are different. 1700-2100 and 1700-2700. This is China, only the sticker may differ :( at what frequency this design is actually designed without dimensions, it is difficult to say.

1727_1700_2100.jpg

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1 hour ago, Harry36 said:

I don't know the design of the patch so that it can cover the 1700-2700 range in MIMO mode with simple powering. 

 

Petra BB the best (i'll try two of those at 90 and see) 

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31 minutes ago, clanon said:

Petra BB the best (i'll try two of those at 90 and see) 

this is not Petra BB, this is Petra 9. this is not a patch, but a slot. it's not mimo. how to place two of these in an 80mm reflector?
if you place two Slot on top of each other, everything will deteriorate and there will be a problem of balancing and branching cables towards the parabola. neither slot nor patch is suitable for direct focus parabolas feed options, except for large mirrors with three arms (1.8-2m).

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Yeah , you're RIGHT...

maybe ANGLED slots in a little box (cube or sphere) 

F4.png

Edited by clanon

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,,, by the way, maybe something like that could be used as crossed dipole...

screenshot_518.png

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On 16/9/2021 at 9:20 AM, Harry36 said:

Version3

image_29740.jpg

 

 

 

 

ezgif.com-gif-maker (1).jpg

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40 minutes ago, clanon said:

 

ezgif.com-gif-maker (1).jpg

different feeding. in the first variant - direct feed (you need a balun), in the second case - Y probe. the second option is the overlap in terms of 1700-2900. but the dimensions must be multiplied by 2+ :(

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