Welcome to XDA

Search to go directly to your device's forum

Register an account

Unlock full posting privileges

Ask a question

No registration required
Post Reply

10 cents GPS AND WIFI enhancer (and obligatory beer ;) IMPROVED DESIGN

OP dingdonggggg

27th February 2012, 10:33 PM   |  #1  
OP Member
Thanks Meter: 44
 
77 posts
Join Date:Joined: Aug 2007
READ THIS POST AND POST 74 AND FURTHER

Have you ever seen such quality in the GPS signals and the fixes? (picture 1)

Ever since I got my TFP in early January I have been trying to find a way to enhance the GPS and the Wifi. I read just about all the threads on these subjects and tried every tweak. Even the crazy ones ;) But because of the form factor I wasn't going to drill holes and put antennas on the back (respect guys, awesome work)

It started with a poster that got flamed straight away. He put a phone on the top right hand corner and got a better GPS. I felt sorry for him because everyone treated him like a retard. Just for the sake of being able to put the flamers in their spot I gave his idea a chance.
And it worked!!! But it was not practical. I can't walk around with a phone pressed against my TFP. But it was a start. Something started happening.

Next came the screwdriver trick. Even better result. Then I discovered the paperclip trick. Again improvement. But still not good enough and certainly not stable. It was difficult to reproduce. It became clear to me that positioning was very critical.

On the Wifi side people started enhancing their signal by placing foil the right Wifi antenna. Then they started using beer cans. It worked for some. But for others it didn't work. Theory was that somehow the Wifi signal got shielded forcing the other Wifi antenna to kick in. Tried it. Worked sometimes and at other moments didn't work. But there was something. And again it became clear to me that positioning was very critical.

Furthermore I started fooling around with grounding to the back plate. It had a dramatic effect on Wifi and GPS. As soon as something touches the back plate the signals die. I got the impression that the Wifi and GPS antenna were to close to each other and with all the RF signals they were screwing each other.

But all together there were things happening. I started documenting exact positions and sizes of the tweaks I was applying. Wifi was reasonable for me as long as I had a good base signal. GPS had my attention. I could get an external GPS, I could tether from my phone, I could buy a map, I could ask directions.
But NO!!!!
I wanted the GPS inside the Prime to get a reasonable fix.

It has cost me a lot of hours of trying, tweaking, adapting, and documenting.
But......
I FOUND THE 10 CENTS SOLUTION!!!
You only need to buy a 1 mm stainless steel cable.

Instructions (also see diagram):
1. First get yourself a beer. And drink it (this is the best part)
2. Then cut yourself a square 15x25 mm from the can (carefull)
3. Stick it in the right place onto the glass
4. Make sure it is isolated with electical tape on the topside
5. Place steel cable across the isolated square (I donít know if this matters but I used 9,75 mm length = 0,5 x wavelength of GPS)
6. Fix it in place with electrical tape
And ......
ENJOY A GOOD GPS (better than my HTC Sensation)

Up to now this is the best result I can get.
Probably sizes and locations can be optimized.
However my experience is that the cable has to extend outside the plane of the TFP. Either vertical or horizontal. As long as it is inside the confines and flat on the glass of the TFP the signal dies instantly
And the electrical tape on top can be exchanged for something better looking.
Customize it like a sticker of a mouse with the tail being the steel cable.
Or a droid sticker with antenna ears upwards.

Outside and in the car I get a 4 second lock and after 10 seconds 15 sats and 10 locked. Inside has improved but not really good enough.
I have reset the prime before testing, cleared AGPS and Wifi off.

I hope you guys enjoy and appreciate my solution.
And if someone finds a better or more elegant solution please post.
Have fun

Oh I forgot to mention. The trick also works with the paperclip. Use a small paperclip. When straightened the length is 95 mm. Also works. I turned to the steel cable because I wanted something flexible.
Attached Thumbnails
Click image for larger version

Name:	GPS enhancer 1.jpg
Views:	2188
Size:	111.4 KB
ID:	922679   Click image for larger version

Name:	GPS enhancer 2.jpg
Views:	4505
Size:	254.1 KB
ID:	922680   Click image for larger version

Name:	GPS enhancer 3.jpg
Views:	2977
Size:	247.1 KB
ID:	922681  
Last edited by dingdonggggg; 6th March 2012 at 07:59 AM. Reason: Minimized footprint and additional testing
The Following 14 Users Say Thank You to dingdonggggg For This Useful Post: [ View ]
27th February 2012, 10:38 PM   |  #2  
Senior Member
Flag Lambertville, NJ or Burlington, VT
Thanks Meter: 105
 
360 posts
Join Date:Joined: Oct 2010
very cool.

I currently have a beer can piece myself on my prime
-not as precise as yours, but it improves my wifi
Attached Thumbnails
Click image for larger version

Name:	IMG_20120223_123310.jpg
Views:	2606
Size:	243.5 KB
ID:	922689  
27th February 2012, 10:39 PM   |  #3  
David522d's Avatar
Senior Member
Thanks Meter: 52
 
545 posts
Join Date:Joined: May 2010
not a beer, but after this j i shall try!
27th February 2012, 10:43 PM   |  #4  
Member
Thanks Meter: 1
 
75 posts
Join Date:Joined: Jan 2010
You guys are awesome....I've been looking for this all day..... a reason to drink beer tonight ^_^ oh and a possible gps solution without opening my TFP
27th February 2012, 10:47 PM   |  #5  
Senior Member
Thanks Meter: 419
 
2,354 posts
Join Date:Joined: Jan 2008
Does yours maintain GPS lock while moving at highways speeds?
27th February 2012, 10:54 PM   |  #6  
h0l's Avatar
Senior Member
Thanks Meter: 64
 
145 posts
Join Date:Joined: Jun 2011
Donate to Me
More
Quote:
Originally Posted by wynand32

Does yours maintain GPS lock while moving at highways speeds?

I'll test that. Drink beer and going high speed on the autobahn
The Following User Says Thank You to h0l For This Useful Post: [ View ]
27th February 2012, 10:58 PM   |  #7  
OP Member
Thanks Meter: 44
 
77 posts
Join Date:Joined: Aug 2007
Quote:
Originally Posted by wynand32

Does yours maintain GPS lock while moving at highways speeds?

YEP
Perfect turn by turn navigation.
On the highway about 10 locks and in urban area a minimum of 6 locks.
And all the time average 14 sats in sight.
I have not tried it yet in an area with very tall buildings.
I think the highest buildings during my tests were 6 floors.
The Following User Says Thank You to dingdonggggg For This Useful Post: [ View ]
27th February 2012, 11:02 PM   |  #8  
Senior Member
Thanks Meter: 419
 
2,354 posts
Join Date:Joined: Jan 2008
If this can be independently verified (and sounds like it can be), then someone could definitely make a little money with this. Not enough to retire on, but a little spending money.

A question: could this be made into something that could clip onto the Prime and so be easily added/removed? While I wouldn't tape anything to my Prime, I'd clip something on it if I were to want GPS to work (which I don't actually, but being speculative here).
27th February 2012, 11:27 PM   |  #9  
OP Member
Thanks Meter: 44
 
77 posts
Join Date:Joined: Aug 2007
Quote:
Originally Posted by wynand32

If this can be independently verified (and sounds like it can be), then someone could definitely make a little money with this. Not enough to retire on, but a little spending money.

A question: could this be made into something that could clip onto the Prime and so be easily added/removed? While I wouldn't tape anything to my Prime, I'd clip something on it if I were to want GPS to work (which I don't actually, but being speculative here).

Yes can be done.
I have been trying some solutions myself.
But the positioning turned out to be a critical factor.
Had to work that out first.
Wanted to share those results first.
But some sort of minimized and customisable clip on device would be nice.
Either pimped or just simple
27th February 2012, 11:44 PM   |  #10  
Senior Member
Thanks Meter: 419
 
2,354 posts
Join Date:Joined: Jan 2008
I'm thinking you could use a simple clip like we use at home for potato chip bags. Line the inside of one part of the clip with the require metal, add in the wire, and then you could simply clip it on when you need GPS. Those clips aren't particularly strong, either, so no worries about damaging the Prime.

I might give this a shot myself this week, if I get some time.

Post Reply Subscribe to Thread

Tags
gps fix enhance prime lock
Previous Thread Next Thread
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes