Recent content by HammerBoy

I guess Engineering Physics focus more on applications, and helps one to find a job in the Engineering Industry, while General Physics focus more on the theoretical aspects. However, do not forget that General Physics also include issues with experiment, and requires one to become an expect on...

My finding so far, although a yagi antenna is probable for GSM 900MHz, its directional sensitivity is limited to about 40 degrees vertical and horizontal, which is not very good in terms of directional testing. Is there any improvement / modification possible to make a yagi antenna to have a...

Thanks. I will look into it to see if a yagi antenna would be a practical solution here.

Unfortunately, no. We do not have contact/cooperation from Cell service provider. Chances are the phone's battery is dried. It is good to know that they are able to locate a phone if they want to, but I am sure it takes no less than a court order to get this done.

Much appreciated for your input. Sadly, we don't have the leisure to have a PLB as we only have the location of the base station for the very last call. Hence, we are making wild guesses using things like, base station location, witness report, family's information, etc. I am not into the Rescue...

The word "Absolute" leads to nothing but a "No" to your question. Even the tiny space between atoms/particles would be filled with radiation, for example, no matter how weak they are. Perhaps this is easier to imagine.

I am with a search team who use Mobile Signal to guess the whereabout of missing persons. I was told that for 900MHz GSM Signal can go as far as 30km if weather permits. I know where the station "B" is, it is about 20km away from my current location "A". At "A", I can receive somewhat...