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Τιμή πώλησης:
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Αριθμός καταχωρήσεων:   19
Πωληθέντα:   1 (Δείτε το ιστορικό)
 
 
 
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ΑΘΗΝΑ - ΑΤΤΙΚΗ
 
 
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Τρόποι πληρωμής:
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Η δημοπρασία ξεκίνησε:
15/06/2010 - 10:11
 
 
Έληξε στις:
20/06/2010 - 10:11
 
 
ID:
21055663
 
 
Κατάσταση:
Μεταχειρισμένο
 
 
 
 
Περιγραφή

antenna booster     booster2.jpg (4516 bytes)     cell phone

Internal or External
Cell Phone Antenna Booster

Retail Price $19.95 each

Increase the reception of your mobile phone connection.
Mount internally under battery or externally.

How it works...

The internal antenna booster works like a dish on a satellite to capture and emit a stronger signal. By placing the internal antenna behind the fixed antenna of the phone you increase the surface area for sending and receiving messages. Allowing for increased signal strength eliminating dropped calls and reducing static interference.

   Fed up with dropped calls and cell phone static iterrupting your important calls? The ultra-thin Cell Phone Antenna Booster reduces static and substantially increases cell phone reception in hallways, buildings, tunnels, remote areas -- any place you can think of. Just place the Cell Phone Antenna Booster under your internal battery or attach to the back of your phone and get better reception...instantly! Works with any mobile phone.

  The Internal Antenna is a passive device designed to capture stray radiation within the phone and re-radiate the signal to improve the phone's performance. This antenna is easy to install. Just slip it underneath the phone's battery, and enjoy clear, enhanced, static-free reception.

1. Remove the battery from your phone.

2. Wipe the battery compartment with a clean dry cloth to remove any fingerprints or dirt.

3. Remove the yellow backing from the antenna booster, being careful not to leave fingerprints. You may find tweezers helpful in this process.

4. Press the antenna booster onto the body of the phone toward the side of the fixed antenna enters the phone. BE CAREFUL when installing the antenna booster in the battery compartment not to let it touch any circuit boards or metal contacts on the body of the phone. 

5. Replace the battery.

PROVEN TEST RESULTS!!!

TEST I - Antenna Booster in low signal indoor areas:

CONTROL ENVIRONMENT - Various indoor concrete buildings with no windows within 35 feet of the cellular phone unit.  Criteria for these experimental locations include low or null signal without the antenna booster installed.  Tests conducted for indoor functionality of the antenna booster spanned over a period of time of no less than a couple of months.  The rationale for the time frame is because cellular sites of various service providers may be overloaded at different times of the day and different days of the week.  The few months time frame also rules out the possibility of a cell site being down or under maintenance.

RESULTS - To our surprise, we found that the antenna booster helped most of the phones gain roughly one bar of signal strength.  In certain cases where the concrete area was underground, the antenna did not noticeably increase the cellular phone's signal.  In metropolitan areas such as Downtown Los Angeles, San Francisco and New York, the antenna booster not only increased the signal strength, but actually helped older analog phones reduce static to the point where the testers say they can carry on a conversation without having to repeat themselves to the other party.  They reported that this was not possible before the antenna booster was installed.  Consistency is the key factor in TEST I.  There were times when certain cell sites were down, and lack of signal affected everyone with the same cellular carrier, regardless if they had the antenna booster installed or not.

CONCLUSION - The manufacturers of the antenna booster claim that their product will help increase cell phone signal in tunnels and indoor areas.  We find that to be true, although saying that "it is like adding a four foot antenna" may be a stretch.  We also found that analog cellular phones also had a significant reduction in static (static and cross-talk is not a factor for digital wireless phones).  To that, we can also validate their claim.

TEST II - Antenna Booster - graphical representation of test results:

TEST EQUIPMENT - For this, we consulted an Electrical Engineer from the University of Illinois.  He basically tested the antenna for frequency strength and interference.  He tested various cellular phones before and after the installation of the antenna booster.  The test results were then averaged out over a period of time.  Those results were then merged and averaged out between cellular phone models and different cellular providers.  This would give a more general and unbiased conclusion on the effectiveness of the antenna booster.

RESULTS - 

antenna booster

The results were then put into graphical representation for interpretation.  The chart has been simplified and the jargon is put in layman's terms.  But as you can see in the above graph, as the signal coverage of the provider grew weaker, the antenna booster helped sustain higher signal strength better as the load increased.  The vertical field of the graph represents approximately the lower two (2) bars of signal strength on a cell phone.  Our TEST I results seem to be pretty consistent with TEST II, as we have said that the antenna booster booster increased roughly one (1) bar of signal strength, although not in absolutely all areas.

 
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