Antenna Difference - Stock Battery Cover vs. Extended Battery Cover - Thunderbolt General

I just picked up the extended battery, for my Thunderbolt.
The extended battery cover clearly has a huge LTE antenna.
The antenna, on my stock cover is very small.
Can any one else confirm?

That's the secondary. The main one is by the kickstand.
Sent from my ADR6400L using XDA App

Why would the stock cover, have a non existent extended antenna?
I would think they would both have the same one.

tanman21 said:
I just picked up the extended battery, for my Thunderbolt.
The extended battery cover clearly has a huge LTE antenna.
The antenna, on my stock cover is very small.
Can any one else confirm?
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Click to collapse
forgive me if im wrong because im no expert but i think the metal things you see sticking out are just the contacts for the antenna. the actual antenna is hidden under that black electrical tape looking thing running around the edge. with that said we cant really see how big the antenna is under that black tape thing.. we dont know if they are both the same size. just cuz that tape is thicker doesnt mean the antenna is bigger...

You are right. I am assuming that there is an antenna under that tape.
On the stock battery cover, there is not even any tape at all.

http://shop.htcpedia.com/htc-thunderbolt-extended-battery-door.html#6
I want to order this but the reports of the batt cover not having same antennas has me a little worried. Also anyone know a good seido case like the platinum one that fits this ?

According to the fcc website the antenna by the kickstand is for 1x voice only. The 3g and LTE antenna are where the two tiny holes in the cover are, and the gps antenna is the piece of "tape" that u see in the stock cover. A buddy of mine ripped his stock cover apart and it appears that the 3g and LTE antennas are molded underneath the plastic with some sort of conductive spray at the factory, that's why the very small contact point that's visible looks like the only antenna. I'll try to get a pic of the torn apart cover.
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radiowatcher_06 said:
According to the fcc website the antenna by the kickstand is for 1x voice only. The 3g and LTE antenna are where the two tiny holes in the cover are, and the gps antenna is the piece of "tape" that u see in the stock cover. A buddy of mine ripped his stock cover apart and it appears that the 3g and LTE antennas are molded underneath the plastic with some sort of conductive spray at the factory, that's why the very small contact point that's visible looks like the only antenna. I'll try to get a pic of the torn apart cover.
Sent from my ADR6400L using Tapatalk
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What's the link to the site you obtained this information?

On the stock cover, the antenna is on the outside, hence the two feedthrough holes. It looks like it's on the inside of the extended battery cover.

I actually experienced a little better reception with the extended battery door.
It wasn't much, but I did pick up 4G in a few more fringe areas than before.

Related

[Q] G2x Battery Door

Why this phone ever came out with this brownish battery door is beyond me. The O2x came out with a black battery door and it looks so much better. Short of tracking down an O2x battery door, are there any places to buy a different battery door? I've googled but to no avail.
You can paint it. Do some looking around you can find a lot of people that have done this and looks great.
Sent from my LG-P999 using xda premium
EBay.....
Sent from my LG-P999 using XDA Premium App
Dont bother me. Im always looking at the front.
Sent from my LG-P999 using XDA App
The metal strip on the battery door is the GPS antenna. There are some hidden connections on the side of the door to feed the signal from the metal strip. I would advise against painting it or using a non OEM door. When I had an extended battery with all plastic door my GPS could no longer get a signal. Many phones have hidden metal in the plastic backs that are used for the GPS antenna.
jboxer said:
The metal strip on the battery door is the GPS antenna. There are some hidden connections on the side of the door to feed the signal from the metal strip. I would advise against painting it or using a non OEM door. When I had an extended battery with all plastic door my GPS could no longer get a signal. Many phones have hidden metal in the plastic backs that are used for the GPS antenna.
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I'm using my 3500 mah battery with an all plastic door and I still get GPS locks, same as when I used my OEM door.
Sent from my CM7 G2x using XDA Premium App
jboxer said:
The metal strip on the battery door is the GPS antenna. There are some hidden connections on the side of the door to feed the signal from the metal strip. I would advise against painting it or using a non OEM door. When I had an extended battery with all plastic door my GPS could no longer get a signal. Many phones have hidden metal in the plastic backs that are used for the GPS antenna.
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Click to collapse
No there isn't.
jboxer said:
The metal strip on the battery door is the GPS antenna. There are some hidden connections on the side of the door to feed the signal from the metal strip. I would advise against painting it or using a non OEM door. When I had an extended battery with all plastic door my GPS could no longer get a signal. Many phones have hidden metal in the plastic backs that are used for the GPS antenna.
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Click to collapse
Thanks for the tip on back cover metal strip as a GPS antenna.
With the OEM back cover, I can get quicker GPS locks (2 mins from a fresh reboot). Using miui-1028 from siulmagic, and changed NTP server address to north-america.pool.ntp.org.
After an initial lock from a reboot, no gps locking needed anymore.
Did this test via reboot twice from the same spot, window sill. Same behavior.
Again, thanks for the tip.
jboxer said:
The metal strip on the battery door is the GPS antenna.
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Where did you hear this? I'm pretty sure the metal on the back is just for aesthetics.
jboxer said:
The metal strip on the battery door is the GPS antenna. There are some hidden connections on the side of the door to feed the signal from the metal strip. I would advise against painting it or using a non OEM door. When I had an extended battery with all plastic door my GPS could no longer get a signal. Many phones have hidden metal in the plastic backs that are used for the GPS antenna.
Click to expand...
Click to collapse
I don't think this is correct, I could be wrong.. But what most have done is to remove the google strip and the cam glass (carefully) paint it, let it dry, then replace the aforementioned items.
Sent from my LG-P999 using xda premium
Battery cover does not have a gps antenna in it. That would require that each door had been tuned at the factory or some expensive tuner were included in the phone. Not size or cost effective.
Gps antenna's in mobile devices are SMALL.
I like the back it blends so it doesnt brother me. But i did put a silicone case on i because i didnt want it to here messed up buy wear and tear, scratch up or damage from a small drop.

[Q] Aluminum Battery/Sim/Camera Cover

Hello Guys,
I was loking for hours to find Aluminum Covers for the DHD to replace the plastic parts but wasn't able to find them (if they even exist).
I only know that HTC never officially released them.
But since I saw the MAO Method they used on the One S I wanted the same for my DHD
Does anyone know a shop where I can find these covers made of aluminum?
Thanks
MiXed
MiXed92 said:
Hello Guys,
I was loking for hours to find Aluminum Covers for the DHD to replace the plastic parts but wasn't able to find them (if they even exist).
I only know that HTC never officially released them.
But since I saw the MAO Method they used on the One S I wanted the same for my DHD
Does anyone know a shop where I can find these covers made of aluminum?
Thanks
MiXed
Click to expand...
Click to collapse
You mean the doors? Won't find them because the clips to hold them in place wont function being made out of aluminum. Thus why only the immobile parts are made of it. If that is not what you are talking about, ignore me Not to mention the signal loss of grounded aluminum over the antennas would be crazy.
Darunion said:
You mean the doors? Won't find them because the clips to hold them in place wont function being made out of aluminum. Thus why only the immobile parts are made of it. If that is not what you are talking about, ignore me Not to mention the signal loss of grounded aluminum over the antennas would be crazy.
Click to expand...
Click to collapse
But would't it be possible to make the outer part of aluminum and just the clips of plastic?
But ok seems to be impossible sad to hear
MiXed92 said:
But would't it be possible to make the outer part of aluminum and just the clips of plastic?
But ok seems to be impossible sad to hear
Click to expand...
Click to collapse
possible yes, but the biggest factor would be that each plastic door covers an antenna. the led flash covers the gps, the battery covers the wifi, and the bottom door covers your cellular antennas. So replacing those with any kind of metal would connect them to the outer shell and ground them, almost completely shielding your phone from signal.
I just looked at the antenna except of gps (didnt want to open it all up). Wifi is just simply spaned mabe same with GPS. Only antenna that runs a bit through the door is the Sim/SD Door Antenna but if you would take a pretty flat and small cable you could run it through the left hole beside the two connectors. I dont know much about antennas but this could even make a stronger signal doesnt it?
p.s. The hole i mean is a bit upper left the two connectors (phone up side down)
MiXed92 said:
I just looked at the antenna except of gps (didnt want to open it all up). Wifi is just simply spaned mabe same with GPS. Only antenna that runs a bit through the door is the Sim/SD Door Antenna but if you would take a pretty flat and small cable you could run it through the left hole beside the two connectors. I dont know much about antennas but this could even make a stronger signal doesnt it?
p.s. The hole i mean is a bit upper left the two connectors (phone up side down)
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the simple answer is no. antenna length is specific to the frequency it uses.
I understand you need a specific lenght of the antenna for certain frequenzies. So the cable that would be needed to connect the two connectors should have around the same lenght as the the Antenna in the plastic door.
Do you know how accurate this would have to be and how do they realize to use different frequenzies with one antenna GSM around 900 MHZ and WCDMA around 2,1 GHZ?
Anything can be done the real question is how much are you willing to spend?
And is it really worth the trouble to go through trying to fix it?
You should just get a new phone instead of changing the parts.

Fix your antennas!

After taking apart the GPS antenna module(led flash cover), cleaning the antenna contacts on the cover and spring clips on phone, and SLIGHTLY bending the spring clips out for improved contact with the cover the GPS lock was back to being less than 10 seconds for initial fix and instant refix.
With such an improvement I decided to do the same procedure to the other 2. The antenna under the battery cover(clean and bend spring contacts out alittle), and the one under the sim/sd card cover(clean and bend spring contacts out a little). My WiFi signal is definitely much better at distance! Bluetooth is better as well!
It is not difficult to do at all, and the results are immediate and VERY noticeable.
Search YouTube for desire hd/inspire 4g GPS antenna cover removal so you don't f it up. Hardest thing is getting GPS cover off, and it takes all of 5-10 minutes!
Good luck all.
Sent from my Inspire 4G using XDA
Thanks. This actually increased the speed of my stock inspire and battery life.
Sent from my Desire HD using XDA
GPS FIXED!
I wanted to bump this thread, as I ended up finding this solution on another forum. I have almost always had issues getting my GPS to lock. I tried all the software based fixes, but none of them seemed to really work. I opened my antennae, cleaned/bent the pins, and now I get INSTANT GPS lock (without any software fixes installed). I strongly urge anyone with issues to try this.
Another alternative is to solder a new antennae:
http://forum.xda-developers.com/showthread.php?t=1318892
yes it is a good thing to clean the contacts and rebend them for additional contact force. That ghetto wire solder job that the person did in your link is only a hair above trying to get a gps signal while hopping on one foot. There is quite a bit of calculations that have to be done to choose antenna length and thickness in respect to the frequency it operates on. What this user did was just pick a random length of wire and connect it, and poorly soldered at that (they probably have a coat hanger coming out of their tv). This type of modification is a TERRIBLE idea and should be avoided at all costs.
But as I said, what the OP did in this thread with the cleaning, this is a good idea.
what did u clean it with?
Im looking at the silver led cover and im like how the hell you take that off I know like something needle nose pliers.
I basically just scraped the metal until it was shiny. A fine steel wool would work, or even sand paper. You just want to get any gray stuff off.
CYRAXDroid said:
Im looking at the silver led cover and im like how the hell you take that off I know like something needle nose pliers.
Click to expand...
Click to collapse
You do it from the inside .
Summary: You are going to remove the battery and then It should reach back to where the plastic cover is. From there you can push (from the inside) the plastic peach and then slide something under it to keep it propped open.
1) Remove your battery
2) You need to prop the plastic piece up from the inside of the case. You could bend the tip of a knife, or whatever.
3) You slide the "prop" inside the battery slot and you want to line it up under the plastic piece around the light.
4) From there you can "push" it up and slide something under the edge to keep it lifted (I used guitar pics). You probably want to use a couple to work your way around.
5) Remove it from the battery facing side first.
Once you have it off it should be obvious where the metal pins are. Bend them upwards, and scrape/clean them off if there is any discoloration.
Putting it back together is a little tricky. Be careful to not break any of the snaps .
Thank me if this helps!
Well I didn't do it but still thank you for posting that info
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[Q] Have you noticed?

Have you, when you put your SIM in the One S that there are a set of brown lines at the back of the sim-card cover?
What are these? There are 3 connection points on the phone that seems to connect to these. Are these the antennas?
If so, when you have bad reception/slow GPS etc, have you checked that this cover are snuggly and correctly fitted back on? That there are no dirt on the connectors?
Was wondering the same thing myself. I'm tempted to try and lift the connectors up a little to see if that will improve the signal.
Sent from the (problematic?) One S.
I did notice... Not sure what they are though. My guess was antenna related as well. Might not be the cell antenna (they look rather small).
Komadyret said:
Have you, when you put your SIM in the One S that there are a set of brown lines at the back of the sim-card cover?
What are these? There are 3 connection points on the phone that seems to connect to these. Are these the antennas?
If so, when you have bad reception/slow GPS etc, have you checked that this cover are snuggly and correctly fitted back on? That there are no dirt on the connectors?
Click to expand...
Click to collapse
Yes it is the antennae.

Aluminum back plate

I just w the aluminum back plates. If I buy the qi sticker, would wireless charging work through the aluminum back?
I'd be more concerned with getting a useable mobile signal with the aluminum back...
Mate, Do a search on net for this topic.
I saw numerous posts and you tube vids where people showed they went from 4-5 bars signal strength to 1-2 in same place when putting an Al back plate on their phones. I hate to think what call clarity or connection stability would be like with that low a network connection.
Those back plates may look great but they cause major problems like this.
Here is one-
http://jetcityninja.wordpress.com/2...-cases-will-affect-cellphone-signal-strength/
the new iphone 6 that all the fan boys leaped over has a metal unibody design in which there are those white plastic inserts at each end of the case, that is to allow transmissions thru the case.
You will notice the Note 4 has 4 plastic inserts thru the metal edge frame too, can be seen on chamfered edges, the rest of each one is covered by the paint on edge. That breaks up the metal of the frame and prevents it forming an unbroken loop that can also interfere with the signal pattern.
Exactly, so the back cover would really have no effect on signal because of this reason.... Right?
big70tom said:
Exactly, so the back cover would really have no effect on signal because of this reason.... Right?
Click to expand...
Click to collapse
Buy it and see but don't say you weren't warned
The answer is no.
big70tom said:
Exactly, so the back cover would really have no effect on signal because of this reason.... Right?
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Click to collapse
As I said above a solid back plate WILL most likely cause significant loss of signal strength as many have reported in the you tube clips I mentioned in my previous post.

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