calipso99

Hi. I'm here once again in need of your help. Need a small and simple 900mhz (890-960mhz) 3G Dish feed to test signal from the last Mobile broadband provider in My área. @Admin if You see this post i'm the guy You designed that 1900mhz Feed for. It worked great (managed to get -47dbm from -75dbm) but the internet connection at the cell tower seems to not be the Best so i need to try with the last provider in My área and see if it Suits My needs. Again thanks for the help.

@Admin that one actually would be easy to put inside a PVC pipe for protection outdoors. actually easier to make.

How do you calculate the diameter and element spacing for such antenna ? its basically a yagi-patch antenna with circular polarization. havent found a calculator that can design a panel-yagi antenna, let alone one that design one with circular polarization.

@Admin yeah, he sometimes reviews fake and dodgy equipment.

that 2nd parasitic, whats the size and spacing from the 1st one ?

i got inspired by this, would want to turn the 1st design into this but with not that many parasitic elements. maybe just three or four after the active element.

@Admin i really wouldnt want to keep pursuing the dish approach, it would require to modify the dish feed point boom and i dont have tools for that.

i have enough polysterene to add another two more parasitic elements to the 1st design.

@Admin i figured maybe adding another parasitic element to it would give it more forward gain. im talking about the 1st design.

Bad news , the antenna is just too big for the dish focal point mount, it will need to work as a standalone antenna.

 @Admin whats the range of the 1st antenna design you gave me?

i realized the cell tower to which i need to connect is 1.5km, and i have perfect line of sight with it.

Just now, Harry36 said:

frequencies 3G 1920-2170? at 2200 SWR = 6+. these dimensions are not very good. 

its ok, the antenna will only be used for 3g 1900mhz band. thats 1850-1990mhz

@Admin im already have the 1st design under construction, unless you saw something wrong with it.

8 hours ago, Admin said:

I use "cst" program but it is also good "hfss".

Thanks, so how much you think the dish will amplify the antenna's gain ?

@Admin ill keep you updated with pictures.

By the way, could you tell me which program you used to design the antenna?

would like to design my own without having to bother anyone.

https://media.istockphoto.com/photos/polystyrene-foam-picture-id178579873 also, you mean polysterene foam as dielectric ?

Thanks a lot, the dimensions are in Milimeters? also, thats a 45 degree bend on each side of reflector ?

oh by the way, the cell tower i want to reach is actually 5.5km away. no ground obstructions.. just trees.

I would feel more comfortable soldering the antenna wire there where the U.FL connector goes. i would need to desolder that connector first and then solder some thin coax wire straight to the board.

2 hours ago, Admin said:

,, try to open your huawei E1756 modem to see where the inside antenna is...!!!

already did, its between the usb port and the rest of the dongle. right next to it is a U.FL female connector. i got to say, cant find the copper trail that connects to the internal antenna.

Alright

1 hour ago, Admin said:

,,, for MiMo, you need another type of antenna...!!!

,,, aaa, well if you have huawei E1756 modem ... why don't you put him in the focus of offset  dish??

Could you at least recommend me a good antenna designer program? one that can design a panel type antenna

10 minutes ago, Admin said:

,,, for MiMo, you need another type of antenna...!!!

,,, aaa, well if you have huawei E1756 modem ... why don't you put him in the focus of offset  dish??

im quite far from the dish, some 8 meters of cable lenght needed, dont think it would be wise to have a USB cable that long, plus i want an actual antenna for my dongle.

Hope you can share the dimensions of the panel antenna.

Just now, clanon said:

Is it MiMo the dongle...? Two antennas...

its a huawei E1756 , it has a single U.FL (or at least it looks like it) port for a external antenna. and im worrying a bit about how im going to connect my antenna to the dongle. thinking about desoldering the U.FL port and soldering some small diameter coax straight to the board.

3 minutes ago, Admin said:

,,, the distance is not great and the trees do not have such a great influence ....!!!

good to know, so you have the dimensions of the panel antenna you shared with me ?

Regarding the disk yagi antenna, that will be a standalone.. just another option. the celullar towers are not farther than 3km, im withing coverage but ping is bad. i dont have line of sight, just trees in the way.

15 minutes ago, Admin said:

,,, for offset dish, I think this is better...

forgot to mention, the dish measures 60x66cm, the widest size is on the vertical axis, just a regular satellite tv dish

4 minutes ago, Admin said:

,,, for offset dish, I think this is better...

like that design, looks not too hard to make, is that an active element plus a parasitic ?

1 minute ago, Admin said:

,, welcome, but on this site you did not find anything useful to you...!!!???

go to this YT video and go to 11:52

 is that good design for 1900mhz 3G band ? (1850mhz-1989mhz)

Regarding the patch antenna design, havent found a simpler enough design for a dish feed point.