Very little thought was given to the antenna on the new iPhone 4 when Steve Jobs himself described it in the keynote as "an engineering masterpiece." For those who do not know, the steel frame of the phone apart from serving as the main structure also acts as an antenna, or rather, as antennas since it is divided into two parts:
The smallest part corresponds to the antenna that will be used for bluetooth, WI-FI signal and GPS signal, while the large part will be the one that will be in charge of receiving the UMTS and GSM signals. Both parts are separated by two slots that were certainly criticized when the iPhone 4 prototype was leaked:
Therefore, this new antenna design will allow the iPhone 4 a substantial improvement in signal reception. Even so, and despite being "a masterpiece of engineering" I think that this steel frame does not follow the unibody trends that Apple has been betting on for a couple of years and perhaps those "slots" have some impact on the final design of the terminal.
Well if the signal is good and everything has been perfectly improved then it is fine and we hope it is like that, otherwise what a disaster.
It's not for nothing, but the aluminum back cover and the steel frame of the iPhone 2G were also used as an antenna ... Nothing new under the sun, come on ...
If what gives protection to the phone is something as important as an antenna, then…. the purchase of the phone case is essential ???? I would like to know more about the resistance of the iPhone 4, although it pains me to see it break (the well-being of the majority outweighs the well-being of the minority or just one - Spock)
While any metallic object is capable of emitting or receiving a radio signal, a radio antenna must have a physical length in resonance with the operating frequency. The formula to determine the length of the antenna is "speed of light divided by the frequency", being able to choose a full wavelength, half, a quarter or subsequent multiples and the construction material must be as conductive as possible where the steel It beats aluminum and copper is one of the best. That is why the Unibody concept cannot be used in this case as it would alter that ideal dimension. Never the entire housing of a team will be an antenna for the same reason. As for protecting the physical integrity of the device, it is possible, but in my experience with the IPad, the best is the original cover or similar. If the IPhone / IPad falls to the ground, the chances of breakage are many, especially the latter due to its weight. Both of them fell off and if it weren't for the cover, the deceased would be crying today.
I agree with you.
PD: Was there so much theory needed? More than 80% have no idea, what's more ... we don't even think about what we post, it's just talking. But thanks.
@OskarL
Yes? So why did it have that piece of black plastic on the bottom? As decoration? Do not.
300.000 (speed of light) over the wavelength (or frequency that is the same) results in the physical length of the antenna. The iPhone fits the laws of electromagnetism like any transmitter / receiver or better said transceiver. The housing could NEVER be an EFFICIENT antenna because various factors are involved in electromagnetic irradiation. It is not a question of connecting the transmitter to any can of preserves, said jokingly. It will work, but its scope will be limited. The Iphone 4 has several antennas because all the services (WIFI / g / n / b, 3G, etc.) work on different frequencies. A single antenna for all services would work but none with efficiency. Note that the steel parts are not of the same dimension because each of them is assigned a service. There is a drawing that shows it.
Rafael… I don't quite understand the reasoning you have given since that formula is not for length, but for wavelength. I can't quite see the relationship between that and the whole case being one piece. Is it not rather that it has been divided in two to save interior space and that the wi-fi, bluetooth and gps do not interfere with the telephone network? I say, huh!
that the wave length is the same as the frequency? eing? the wavelength IS a function of the frequency but they are totally different concepts. I wish calculating the real dimensions of an antenna was as easy as applying a formula ...
Then, according to you, the reception of the GPS signal, which is the one that interests me the most, will improve to put itself on an equal footing, with the reception quality of a standard GS.
- From my way of seeing the GPS quality of the iphones anterores was very bad, not only for navigation applications, but for any application with localization.
- Second question, do we have or will we have an application that shows the photographs taken, tagged by GPS, to show them on a map?
-Another question, what happens with my applications purchased for my iphone 3g, can I pass them in a tender way to my new iphone 4g, in the event that I acquire it.
Reply fellow forum.