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Mine wifi reception isn't so bad now. I have soldered back original wifi antenna, so there is two wifi antennas in mine dropad now. Can't tell in dBm, but now it hops from full bars to 3 of 4 bars in same room with router.
 

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Hm. Does anyone here know microwave antenna theory? If multiple antennas are connected in parallel, are there any possible pitfalls? Should they be located in certain distance / orientation from each other to get best results? I have one more PSP antenna and the original one
 

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Nope. I just read in this topic that someone was asking about soldering second antenna, so I tried. It didn't became worser at least, then it were before, when only psp antenna was connected.
 

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@ TL1
if you google the subject you'll find out, there is a lot theory about it.


I'm not an electronic- or antenna specialist, but I remember this:
I had some problems with my notebook years ago, and tried to fix that too.
Everything in the design of an antenna makes sense, maybe even the length of the connecting wires. Somebody here said, the pad's antenna is only a short piece of metal. Mine is not, it is cut to a special shape, and the connection points on this piece of metal are very important.
I'm waiting for the PSP-antenna too, and I'm going to NOT cut the wire, but solder a jack to the board, to connect the antenna like it should be: shielded. But I don't know, if it will improve reception!
My pad isn't so bad, but could be better. Maybe it's the different length of our connections (cables!), that causes the differences

@ Awesomo
Using two antennas only makes sense, when the board knows, how to handle them, it's this "diversity"-thing (or something like that).
Putting two antennas to one connection only splits the power to each one in half, so you are lucky, that the reception didn't go down. If the antennas you paired are of different design, it might also be, that the reception goes down very badly...
 

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@ Awesomo
Using two antennas only makes sense, when the board knows, how to handle them, it's this "diversity"-thing (or something like that).
Putting two antennas to one connection only splits the power to each one in half, so you are lucky, that the reception didn't go down. If the antennas you paired are of different design, it might also be, that the reception goes down very badly...
I went back to original antenna, because there was interference with speakers(there were weird sounds). Before that I tried again only psp antenna in different positions, signal never raised more than 3 of 4 bars. After that I tried original antenna, I managed to get full bars, but again there was problem with speaker. And cable was to short to try more positions, so I soldered original antenna to psp cable. Sometimes it shows full bars, but most of he time it's 3 of 4. So it seems original antenna is better than psp one.
 

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This will be a real issue for me since I decided on the Herotab C8 rather than go with a tablet that had G3 phone access. I hope by the time I get my tablet (somewhere around July 1), there is a solution to the wifi problems.
 

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This will be a real issue for me since I decided on the Herotab C8 rather than go with a tablet that had G3 phone access. I hope by the time I get my tablet (somewhere around July 1), there is a solution to the wifi problems.
I doubt it can be solved, but some people have normal wifi reception, maybe you will be lucky to get normal tablet. That's not only problem that can be with this tablet, if you look known issues topic. I wouldn't recommend you buying it(or any of chinese stuff), but it's too late.
 

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Okay, so I have the same WIFI problem. My Haipad M7 had April 2011 firmware preinstalled, so I'm guessing it is a more recent build.

I somehow managed to get it working more or less in my home (which is not a Chinese appartment for which it appears to have been made, it's more like the Forbidden City with two high end Linksys WIFI routers). It had a reach of 40 feet through walls, which is still a lot but I found it manageable enough to not go through the trouble of tweaking the hardware.

And then I bricked the bugger. Oops.

Oh well, might as well go all out if I have to open it to debrick, so I did.



What the...



Oddly, none of the pictures posted here and elsewhere had this as a standard layout for the WIFI. But again, this is a more recent build considering the firmware. So I guess they tried correcting the WIFI problems by instead of a small wire and the little clip attached to the back panel, they just went ahead and attached a friggin' footlong!

Also this.



To describe what you're seeing there, it's like a clip of flexible metal, glued on, and with some really loose black rubber cube overlapping. I imagine it would have fallen off, considering it's like being cut by how the two parts of the clip are crossed over and against eachother.

Some more visual illustration, me lifting up the upper part with the black cube:



Now I see why the bugger is not exactly getting a whole lot of reception.

So, what would you people recommend me to do? Solder a different antenna onto it? Or perhaps shorten the cable and attach the clip to the back panel, the way everybody else has it?

And in case of a different antenna, can I just yank one out of some old laptop? Or should I go with something more recent?
 

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Wow, this is a real "WTF"! I think the best idea is to install the PSP anthenna. And of course remove the masking tape from the chips!
 

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Hi Thierry,
I messed around with the PSP-antenna, and found the biggest problem is the Dropad's metal housing!
When I placed the PSP-antenna away from the housing (not possible with my original short wire), not closing the back panel, I had perfectly high reception, 10-20dB better, than original. But placing the antenna internal is nearly as bad as usual. There is too much metal used in the Dropad, and that blocks the signal!
Try to hold your antenna far away from the dropad and see if the reception is better, I bet you will have much better values.

I now placed my PSP-antenna in the topmost right corner of the back, far away from the speaker. But the wire has to be placed carefully too. At my first try, it layed on top of the speaker amp circuit, and again I had very bad distortions. Now it's positioned at the right side of the back panel, no distortions any more.
On your pictures the antenna wire is lying between the battery and the main board, exactly where that amp circuit is! Do you have distortions in the speaker?

For me, the advantage of the PSP-antenna is the long wire, the original wire was too short to find a better position for the original antenna.
The PSP antenna now gives me slightly better reception, and it also depends on the direction to the router. If I hold the Dropad with it's display facing to the router, it's still like with the original antenna, but when I turn it around, so the back faces the router, I have ~10dB better reception! With the original antenna I didn't have that!
It seems like most of the front is made from metal (the display and housing?) and so it blocks the wifi signal.

The black block in your antenna looks like a spacer, the two arms have to be in the correct distance to work!
As your antenna has a mounting hole, it is possible that a connection to the metal housing will give you better reception. Some antenna designs a made for mounting it to the metal housing, but I don't know, if it's the case for your antenna.
I found some information about different antenna designs:
http://hibp.ecse.rpi.edu/~connor/education/Antennas/NSYSU2.pdf
it's a 1,4MB pdf, but you will find very funny designs there. Unfortunately, our antennas are not in it.

Btw: you are one of the lucky guys, that have a 2300mAh battery (in your Haipad)! My Dropad batch only had a 1500mAh battery, but some buyers now have a 2200mAh battery.
 

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@eatatjoes: Thanks for all the info, very comprehensive! (Though I must say those antenna designs are erm... yeah, I guess there is still some debate then?)

I was able to debrick and started moving the wifi antenna around a bit. In the end, I glued it to the back at the same position you took (as far away from the speakers as possible. The sound doesn't seem to be distorted, never was, and isn't now either.

I haven't ordered a PSP1000 yet, because it seems to work adequately for now (well, about a third from my iPhone, but that's still alright). I like saving me the trouble.

@TL1: Thanks for the heads up on the tape, I removed it. Silly Chinese.
 

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Hi Thierry,
now that you placed your antenna up there:
do you also have a much better reception when you direct the Haipad with it's back to the router?
I tested it in my appartment, at a point where the reception was very low before, but when I turn the 'pad around, the reception goes up and is very good!
I used the app "Wifi analyzer", it has a nice indicator, like a speedometer, not only numbers to read...
 

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Hi Thierry,
now that you placed your antenna up there:
do you also have a much better reception when you direct the Haipad with it's back to the router?
I tested it in my appartment, at a point where the reception was very low before, but when I turn the 'pad around, the reception goes up and is very good!
I used the app "Wifi analyzer", it has a nice indicator, like a speedometer, not only numbers to read...
Yeah I noticed this too. When I went to its maximum reach, it seems like the thing gets about 8 feet better connection if I turn it toward the WIFI point. The conclusion should be the pad is incredibly interfering with the Wifi. Though I would imagine the antenna has something to do with this as well, since you're using the PSP, it seems like that won't solve the interference.

If I look at this teardown of an iPad: http://www.ifixit.com/Teardown/iPad-Wi-Fi-Teardown/2183/3 - I see Aplle tries to cope with this by using some sort of external harness to make the reception equally distributed.

Going on a leap here, the iPad (1, don't know about 2) has a hyperbolic back and a bunch of strips, nuts and bolts just for this it seems, so if you really plan on going all out, you could do the same thing by placing the wifi in a custom made metal casing outside the screwed panel and adding a modified back cover. In that case, you would have nullified the pad's interference and you could even buy a stereo speaker set and place one on both sides. But I'm pretty much satisfied for now.

For those reading this thread in the future, I will place this in bold though:

The placement of the WIFI antenna is probably the biggest problem if you get terrible reception. Don't be afraid to open its back and move it around, you don't need to be a techy, just follow this video:
(I didn't even use a suction cap, just a creditcard and two screwdrivers, don't be scared!) and move the antenna around. You can use the pad without the casing to test the reception. I glued it to the screwed casing in the upper right corner (where the buttons are) and it improved my wifi 3-fold. If that's not enough, check out the PSP1000 like most people do. Courtesy of eatatjoes' advice.
 

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one thing I noticed is that from time to times the signal will go above 3 bars at least on mine makes me think its a power saving setting built into the tablet or a gingerbread wifi driver since I'm in genesis 3.0 wonders if utbetters drivers botked a bit
 

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rhaziell. Could you put your pictures to differnt place (now are inaccesible)? I also have a problem with wi-fi and cannot find good pictures, specially pictures the place where antenna cables are connected to mainboard.
 
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