I was thinking about how the Dinc2's back cover is the antenna, and how BAD this phone's reception is. Has anyone ever tried to add copper tape or mod the rear cover in any way to increase reception?
Rumblur said:
I was thinking about how the Dinc2's back cover is the antenna, and how BAD this phone's reception is. Has anyone ever tried to add copper tape or mod the rear cover in any way to increase reception?
Click to expand...
Click to collapse
Not being an Electrical Engineer with concentrations in antenna design and RF, I can´t say for sure, but you may harm or hurt the phone. I´d first look at cleaning the contacts of the existing rear cover to try to increase the efficiency of the antenna as designed, and watching how I hold the phone. This could also mean the phone has less work to do searching for signal, which can boost battery life. Also, maybe use some conductive paint. I´d imagine the copper tape would be a bit thick in the case personally, and as for the design of the new antenna, I´m clueless.
but seriously, give it a shot and let me know how it works! If all else fails, you can use the external antenna port to really boost the sucker, especially if you´re driving, or using it at home.
Rumblur said:
I was thinking about how the Dinc2's back cover is the antenna, and how BAD this phone's reception is. Has anyone ever tried to add copper tape or mod the rear cover in any way to increase reception?
Click to expand...
Click to collapse
there's a thread about it in the general section. since I'm nice here's the linkclick here
Related
any body heard of any sort of metal or steel type back for the evo? i really liked the back for the hd2 the solid cool feeling of the metal was awsome and would be a greta feature to add to the evo 4g. make it look and feel more bad ass Lol
As long as you don't want to use your compass... or apps that use it
-------------------------------------
Sent via the XDA Tapatalk App
I am no electrical engineer but I decided to have some fun doing experiments. I took a sheet of aluminum foil and placed it behind the phone. The signal strength dropped from -73 to -87. So clearly having metal over antennas will block the signal.
I also recall hearing that is why they removed the aluminum back cover from the first iPhone.
This is just a warning in case you ever do find an after market metal cover. It might hurt your signal strength and in turn battery life.
Pops_G said:
I am no electrical engineer but I decided to have some fun doing experiments. I took a sheet of aluminum foil and placed it behind the phone. The signal strength dropped from -73 to -87. So clearly having metal over antennas will block the signal.
I also recall hearing that is why they removed the aluminum back cover from the first iPhone.
This is just a warning in case you ever do find an after market metal cover. It might hurt your signal strength and in turn battery life.
Click to expand...
Click to collapse
The solution would be to do what Apple did for the iPhone 4. Use the outer metal rim as the antenna. Honestly, I think it's a stroke of genius.
liquidkernel said:
The solution would be to do what Apple did for the iPhone 4. Use the outer metal rim as the antenna. Honestly, I think it's a stroke of genius.
Click to expand...
Click to collapse
and i bet they panted it..
liquidkernel said:
The solution would be to do what Apple did for the iPhone 4. Use the outer metal rim as the antenna. Honestly, I think it's a stroke of genius.
Click to expand...
Click to collapse
We will see how it plays out. I am quite sure touching an antenna with your hands reduces its signal. So that design might not work out as well as it would seem.
In my testing I found holding the EVO at different points would increase/decrease the signal. It should be the same with the iPhone.
Pops_G said:
We will see how it plays out. I am quite sure touching an antenna with your hands reduces its signal. So that design might not work out as well as it would seem.
In my testing I found holding the EVO at different points would increase/decrease the signal. It should be the same with the iPhone.
Click to expand...
Click to collapse
iphone 4 metal frame is surrounded the top section is the main area where they have placed the antenna circuit the rest is the design flow. so it will work good enuf, I am not trying to compete with Evo or anything bad about evo just telling you something. evo for sprint is still the best .. the Ball is in sprin't court now its up to them how they continue with it such as by updating to 2.2 and how fast these things will count.
Pops_G said:
We will see how it plays out. I am quite sure touching an antenna with your hands reduces its signal. So that design might not work out as well as it would seem.
In my testing I found holding the EVO at different points would increase/decrease the signal. It should be the same with the iPhone.
Click to expand...
Click to collapse
There is in fact a warning in the documentation that came with the EVO, which states that placing your fingers on the portion of the phone left of the LED flashes, may interfere with your signal. I don't recall if it's in the Getting Started guide or the main user manual.
fazzy said:
iphone 4 metal frame is surrounded the top section is the main area where they have placed the antenna circuit the rest is the design flow. so it will work good enuf, I am not trying to compete with Evo or anything bad about evo just telling you something. evo for sprint is still the best .. the Ball is in sprin't court now its up to them how they continue with it such as by updating to 2.2 and how fast these things will count.
Click to expand...
Click to collapse
Oh I wasn't trying to make this an EVO vs iPhone debate. Just a general observation about antennas. It was also a problem I noticed on the EVO. Your hand/body will reduce the signal if placed in certain locations. I have seen this happen on TVs that are grabbing signal from the air, radios, and cordless phones.
So all I am saying it putting the iPhone's antennas on the outside might not be the stroke of genius people think it is. Not to mention it would be difficult to hold that phone without touching 2 different antennas at once. That might cause cross interference.
Hmm maybe I should start a thread specifically for antenna discussion, this title is a little misleading, and we went off into a tangent.
I mean, I'd be happy with a plastic back cover that FIT RIGHT
phinnaeus said:
I mean, I'd be happy with a plastic back cover that FIT RIGHT
Click to expand...
Click to collapse
I heard this in another thread, but I am not seeing it. My back cover sits totally flush and looks great. Did I get lucky, or is there something else I'm missing?
phinnaeus said:
I mean, I'd be happy with a plastic back cover that FIT RIGHT
Click to expand...
Click to collapse
Someone else posted somewhere that they put a piece of paper (folded once?) between the battery and the cover, and that pushed the center out enough to bring the outer edges flush.... could try that.
Jye75 said:
Someone else posted somewhere that they put a piece of paper (folded once?) between the battery and the cover, and that pushed the center out enough to bring the outer edges flush.... could try that.
Click to expand...
Click to collapse
That fix worked for me. Probably could be solved with a thin piece of foam glued to the inside of the cover too.
phinnaeus said:
I mean, I'd be happy with a plastic back cover that FIT RIGHT
Click to expand...
Click to collapse
i've modded my cover to fit perfectly, and solidly. i'll post a thread later tonight.
So what about the HTC Legend with the aluminum unibody? Do they use the whole body as a antenna?
Pops_G said:
I am no electrical engineer but I decided to have some fun doing experiments. I took a sheet of aluminum foil and placed it behind the phone. The signal strength dropped from -73 to -87. So clearly having metal over antennas will block the signal.
I also recall hearing that is why they removed the aluminum back cover from the first iPhone.
This is just a warning in case you ever do find an after market metal cover. It might hurt your signal strength and in turn battery life.
Click to expand...
Click to collapse
I'm an electrical engineer, and I will confirm this. Perhaps someone could attach the metal back to the antenna somehow, though. That would be interesting.
Has anyone heard of someone making an improved antenna back cover? Possibly one that can hold an extended life battery?
I don't know about improving the antenna signal, but a new backcover might be useful in itself. The stock one seems to flex towards the top near the speaker.
Well, it's 6 am here and I decided to do a little experiment with my phone to boost my signal.
I simply placed aluminum foil over the signal connector thingy and it did happen to boost it up to 3 steady bars, when I would normally get about 1.
This may or may not work for you. Let me know if this actually worked for you.
Sent from my ADR6350 using XDA Premium App
Pictures would be great. There are two antenna connectors in the back cover, one near the bottom and one near the top.
Didnt work for me
arent you supposed to put toothpaste in the foil and wrap it good?
jesand83 said:
Pictures would be great. There are two antenna connectors in the back cover, one near the bottom and one near the top.
Click to expand...
Click to collapse
Yeah, that's exactly were I placed them and closed the cover. It molds right in.
Sent from my ADR6350 using XDA Premium App
voxigenboy said:
arent you supposed to put toothpaste in the foil and wrap it good?
Click to expand...
Click to collapse
I don't know anything about that.
Sent from my ADR6350 using XDA Premium App
wouldn't that put both the ground and signal in contact with each other? possible to post a quick picture?
There are 4 contacts under the phone, and 4 on the back cover. 2 of them (next to the camera) are linked. I suspect the contacts next to the camera are the looped GPS antenna.
The other 2 contacts are separate radios. One is wifi and the other is mobile (they are not looped). These should not be bridged (this can cause problems, actually). I think the outer contact is mobile and the inner (has the longer yellow strip on stock back cover) is wifi.
I've been kinda studying the back cover antenna thing and I've come to a bit of a strange conclusion: I knew the yellow bit was conductive paint or ink, but I'm suspecting that the yellow bit is the entire antenna as I can't find any other connectivity, wires, etc.
I know I've been defending this device in terms of signal quality, but I'm thinking, now, that this can be improved a lot. I'm probably going to be destroying my back cover in the name of science this weekend. I know I can get a replacement back cover so no big deal!
nimdae said:
There are 4 contacts under the phone, and 4 on the back cover. 2 of them (next to the camera) are linked. I suspect the contacts next to the camera are the looped GPS antenna.
The other 2 contacts are separate radios. One is wifi and the other is mobile (they are not looped). These should not be bridged (this can cause problems, actually). I think the outer contact is mobile and the inner (has the longer yellow strip on stock back cover) is wifi.
I've been kinda studying the back cover antenna thing and I've come to a bit of a strange conclusion: I knew the yellow bit was conductive paint or ink, but I'm suspecting that the yellow bit is the entire antenna as I can't find any other connectivity, wires, etc.
I know I've been defending this device in terms of signal quality, but I'm thinking, now, that this can be improved a lot. I'm probably going to be destroying my back cover in the name of science this weekend. I know I can get a replacement back cover so no big deal!
Click to expand...
Click to collapse
I have a cover that's dented..if you need it for science...well..
sent from an under rated phone
nimdae said:
There are 4 contacts under the phone, and 4 on the back cover. 2 of them (next to the camera) are linked. I suspect the contacts next to the camera are the looped GPS antenna.
The other 2 contacts are separate radios. One is wifi and the other is mobile (they are not looped). These should not be bridged (this can cause problems, actually). I think the outer contact is mobile and the inner (has the longer yellow strip on stock back cover) is wifi.
I've been kinda studying the back cover antenna thing and I've come to a bit of a strange conclusion: I knew the yellow bit was conductive paint or ink, but I'm suspecting that the yellow bit is the entire antenna as I can't find any other connectivity, wires, etc.
I know I've been defending this device in terms of signal quality, but I'm thinking, now, that this can be improved a lot. I'm probably going to be destroying my back cover in the name of science this weekend. I know I can get a replacement back cover so no big deal!
Click to expand...
Click to collapse
cool! haha. look forward to hear back any conclusions or findings from your experimenting.
nimdae said:
There are 4 contacts under the phone, and 4 on the back cover. 2 of them (next to the camera) are linked. I suspect the contacts next to the camera are the looped GPS antenna.
The other 2 contacts are separate radios. One is wifi and the other is mobile (they are not looped). These should not be bridged (this can cause problems, actually). I think the outer contact is mobile and the inner (has the longer yellow strip on stock back cover) is wifi.
I've been kinda studying the back cover antenna thing and I've come to a bit of a strange conclusion: I knew the yellow bit was conductive paint or ink, but I'm suspecting that the yellow bit is the entire antenna as I can't find any other connectivity, wires, etc.
I know I've been defending this device in terms of signal quality, but I'm thinking, now, that this can be improved a lot. I'm probably going to be destroying my back cover in the name of science this weekend. I know I can get a replacement back cover so no big deal!
Click to expand...
Click to collapse
Interesting. I will have to do some science as well, with FOIL!
anyone know where I can get conductive paint from? Maybe thickening the pre painted paint will make a better connection with the signal thingies?
And about the pics, sorry I can't post any, my phone is the only camera I have at the moment.
Sent from my ADR6350 using XDA Premium App
you could still take pictures with the battery cover off, no? isn't the foil on the battery door?
Avelnan said:
Interesting. I will have to do some science as well, with FOIL!
anyone know where I can get conductive paint from? Maybe thickening the pre painted paint will make a better connection with the signal thingies?
And about the pics, sorry I can't post any, my phone is the only camera I have at the moment.
Sent from my ADR6350 using XDA Premium App
Click to expand...
Click to collapse
Conductive ink is generally composed of a conductive polymer or contains metallic dust for conductivity. It's generally used as a cheaper method of bridge contacts between conductors. I've never seen it used this way before.
One thing I know about wireless signaling is length of antenna wire is important. I don't know the exact math for determining optimal length by frequency, but I do know the longer the better, preferably long enough to receive a full wavelength.
To be honest I'd be quite surprised if the conductive ink is being used as the antenna. However, I really can't find evidence to state otherwise.
nimdae said:
To be honest I'd be quite surprised if the conductive ink is being used as the antenna. However, I really can't find evidence to state otherwise.
Click to expand...
Click to collapse
I have to agree..since it only gets signal with cover on.
sent from an under rated phone
The inner contact is actually the mobile radio. I'm getting signal with bus wire but it's not a marked improvement. This is connected to the full 400' spool, though.
I've already damaged my back cover so I'm pretty much committed to this experiment. Going to do a little more testing before I commit to modification.
nimdae said:
The inner contact is actually the mobile radio. I'm getting signal with bus wire but it's not a marked improvement. This is connected to the full 400' spool, though.
I've already damaged my back cover so I'm pretty much committed to this experiment. Going to do a little more testing before I commit to modification.
Click to expand...
Click to collapse
I have an extra. Where you live
sent from an under rated phone
knipp21 said:
I have an extra. Where you live
sent from an under rated phone
Click to expand...
Click to collapse
Eh, don't worry about it It's not gonna bother me to have to buy a new one.
After a bit of testing using a 1' length of wire (used solder to build a flat contact on the end and pressed it in, feeding the wire through the tiny hold...for testing) I've found the signal strength marginally improves, but the data speeds improve quite a bit. In one of my rooms I tend to get poor signal/speed (pipes? not sure) but was able to double my speeds. However, the connection was still pretty unstable.
The end with my homemade flat contact broke and I don't feel like making another one right now. I have a temporary solution that works, but is a bit fragile.
nimdae said:
Eh, don't worry about it It's not gonna bother me to have to buy a new one.
Click to expand...
Click to collapse
Ok btw I got hulu plus to work
sent from an under rated phone
Very interested to hear your results, nimdae. I was almost going to play around with this the other day.
I do have a suspicion though that some of the antenna may actually be "hidden" in the cover. I managed to carve off and expose some metallic looking material where you open the case at. Not sure if it is indeed since I didn't go any further.
Foil worked for me!!! My signal just went from -125 dbm to 98 dbm!!
Sent from my Incredible 2 using XDA App
Just replaced the screen on my Oneplus 3, and everything works fine except that the phone gets insanely hot (easily 50C on the outside of the back cover) when the back cover is on. When I removed the back cover however all parts of the phone are cool to the touch when it is powered on. Anyone know why this might be? Is the back cover shorting something out perhaps?
Freddieboy said:
Just replaced the screen on my Oneplus 3, and everything works fine except that the phone gets insanely hot (easily 50C on the outside of the back cover) when the back cover is on. When I removed the back cover however all parts of the phone are cool to the touch when it is powered on. Anyone know why this might be? Is the back cover shorting something out perhaps?
Click to expand...
Click to collapse
Since the covers are not metallic, I don't think so. But it is possible that the cover is compressing an area on the phone which leads to a short circuit.
Try a softer cover like a TPU.
tnsmani said:
Since the covers are not metallic, I don't think so. But it is possible that the cover is compressing an area on the phone which leads to a short circuit.
Try a softer cover like a TPU.
Click to expand...
Click to collapse
Im not talking about a case, I'm talking about the actual aluminum back cover of the phone.
Freddieboy said:
Im not talking about a case, I'm talking about the actual aluminum back cover of the phone.
Click to expand...
Click to collapse
Sorry for the misunderstanding. Obviously, it is the positioning of the internal components (which should have been disturbed in your case) that cause the short circuit when the back cover is put on.
If the screen was replaced by a technician, it is better to take it to him. If you did it yourself, try troubleshooting with all the exposed components on the back.
tnsmani said:
Sorry for the misunderstanding. Obviously, it is the positioning of the internal components (which should have been disturbed in your case) that cause the short circuit when the back cover is put on.
If the screen was replaced by a technician, it is better to take it to him. If you did it yourself, try troubleshooting with all the exposed components on the back.
Click to expand...
Click to collapse
Yeah, I managed to fix it by putting electrical tape over some of the connections (likely used for antenna reception) which lead from the motherboard to the case. Now it is just a matter of trial and error to find which of these pins are causing the problem. I seem to have blocked the connection from the Bluetooth antenna though as the connection is really weak now, but that is a very easy fix
Freddieboy said:
Yeah, I managed to fix it by putting electrical tape over some of the connections (likely used for antenna reception) which lead from the motherboard to the case. Now it is just a matter of trial and error to find which of these pins are causing the problem. I seem to have blocked the connection from the Bluetooth antenna though as the connection is really weak now, but that is a very easy fix
Click to expand...
Click to collapse
I have the same problem. Could I ask what antennas/parts you put the tape over?
bhupinder2001 said:
I have the same problem. Could I ask what antennas/parts you put the tape over?
Click to expand...
Click to collapse
You'll most likely either have fixed it by now, or thrown the phone out the window, but hey!
Mine was sort of fixed, but the touch was still acting up so I sold it as "not working" and bought a new one. Can't remember which pins I put tape over, but I assume they wouldn't be the same for two people anyway. It seemed really random to me at the time.
Hi
I just replaced the battery on my Samsung Galaxy S9 phone. After the battery replacement people calling me (regular phone calls) complaints about hearing an echo of their selves. I'm able to fix this by removing the back glass cover (the one that is glued on) but as soon as I put the back glass cover back people calling me hear them selves again. So I'm not sure if I have broken anything on the back cover itself when I replaced the battery or if I have broken anything related to the speaker or mic here? If I put people on speaker there is no echo, and if I use bluetooth headset everything is working fine as well.
I'm guessing this is hardware related so the question is which hardware component I should replace here?
Any suggestions is greatly appreciated.
Thanks.
lacasette said:
Hi
I just replaced the battery on my Samsung Galaxy S9 phone. After the battery replacement people calling me (regular phone calls) complaints about hearing an echo of their selves. I'm able to fix this by removing the back glass cover (the one that is glued on) but as soon as I put the back glass cover back people calling me hear them selves again. So I'm not sure if I have broken anything on the back cover itself when I replaced the battery or if I have broken anything related to the speaker or mic here? If I put people on speaker there is no echo, and if I use bluetooth headset everything is working fine as well.
I'm guessing this is hardware related so the question is which hardware component I should replace here?
Any suggestions is greatly appreciated.
Thanks.
Click to expand...
Click to collapse
Seems some kind of crosstalk related to mic or antenna. You shouldn't have reapired by yourself.
So a replacement of the antenna and charging coil module could potentially fix this? If so I think that is a bit odd since both wireless charging and antenna coverage seems to be OK. Also, as I've mentioned there are no echo if I remove the back cover.
ZoiraP said:
Seems some kind of crosstalk related to mic or antenna. You shouldn't have reapired by yourself.
Click to expand...
Click to collapse
rather presumptuous of you to say that they shouldnt have repaired it themselves.
lacasette said:
So a replacement of the antenna and charging coil module could potentially fix this? If so I think that is a bit odd since both wireless charging and antenna coverage seems to be OK. Also, as I've mentioned there are no echo if I remove the back cover.
Click to expand...
Click to collapse
many of the mics ive seen while doing the many repairs ive done have little rubber footings or adhesive foam rubber isolation material around or on them, did you get all of the stuff put back where its supposed to go?
I took another look at the rubber footing of the mic that you mentioned. I also noticed the little "rubber net thing" on right hand side of the mic seems a bit melted - not sure if this could play any part?
Again, what is really puzzling is that the error occurs only after I've firmly put some pressure on the back cover after mounting it (so that it is glued back on). If I loosely put it on people don't hear the echo of them selves.
Any idea?
ps. I've got some pictures of the inside of the phone but since I'm new to this forum I'm not able to post pictures yet. Please let me know if there are any other methods of sharing the photos and I'll be glad to share.