antenna-theory.com

[chandan.pradhan14]

Do radiation beam using antenna array could make a 360 degree scan??
And can antenna array be used in BS of cellular network to track the mobile user?

[Schubert]

Yes it is possible to do 360 scan. You can adjust the weights of the antenna array for maximum reception towards any specific angle. This will require a 2-dimensional array though.

It is also possible for a base station to track a mobile user. However, base stations tend to have broad beam widths for maximum coverage, so there would need to be a major overhaul to the infrastructure (more antennas, tighter beam width antennas, and a lot more processing).

[waleed123]

here are a few ways depending on what type of antenna it is.

If you have a simple half-wavelength dipole antenna, you can assume a resistor of 70 Ohms and some inductance (impedance is about 73 + j43 ohms) depending on the frequency.

If you have a complicated antenna, you can measure it on a Vector Network Analyzer (VNA) to get the impedance and then make a simple circuit.

Generally you will have some resistance (for radiation resistance + loss resistance) and either some capacitance or inductance in series.

[EA1DDO]

Hi Chandan,

Yes, that is called "Smart Antenna" system.



There are several ways to implement that. Please have a look at next link:

http://robotification.com/2007/06/15/smart-antennas/



http://www.ijser.org/paper/An-Intelligent-Approach-for-Dense-Urban-Area-in-existing-2G-2-5G.html

I am not sure if this system is already in use. May be some where, not everywhere.

Regards, Maximo