smart antenna-antenna diversity

...very interesting research topic ... i think is too difficult to implement a smart antenna in the mobile due to the restrictions on size an power consumption (PA + DSP)
however take a look to:

Design of Diversity Antennas for Mobile Telephones
Rowell & Murch
ISRP 97

it's a design based on two PIFA antennas, you can find it on citeseer: h**p://citeseer.ist.psu.edu/

waiting for experts suggestions :)

regards

smart antennas need much technology of software about arithmetic,so it is difficult to design!

thanx niwhawk n wf6797, this is my final year project title, and my lecturer wants me to design microstrip patch antenna for mobile phone that is smart, like can adapt with different polarization, any more suggestions?

Hi dalila,

look at microwave journal (I think the web version is free if you register)for some already available ideals. I have seen it in several issues but I can't remember which ones?

Not much help but could be a starting point.

Cheers,
Element7k

I would try cross ploarize antennas. you will have two uncorrelated antennas. Do you have to implement the algorithm also? If so, I can give you a review paper on this topic.

interest topic

warning #6 (no comment) /eirp

hi dalila:

I think this paper can be useful to you:
"An Overview of Smart Antenna Technology for Mobile Communications Systems"
Lehne et al
IEEE Communications Surveys
h**p://www.comsoc.org/livepubs/surveys/public/4q99issue/lehne.html

...like it establishes, one can define "levels of intelligence":

-Switched lobe (SL): This is also called switched beam. It is the simplest technique, and comprises only a basic switching function between separate directive antennas or predefined beams of an array. The setting that gives the best performance, usually in terms of received power, is chosen. Because of the higher directivity compared to a conventional antenna, some gain is achieved. Such an antenna will be easier to implement in existing cell structures than the more sophisticated adaptive arrays, but it gives a limited improvement.
-Dynamically phased array (PA): By including a direction of arrival (DoA) algorithm for the signal received from the user, continuous tracking can be achieved and it can be viewed as a generalization of the switched lobe concept. In this case also, the received power is maximized.
-Adaptive array (AA): In this case, a DoA algorithm for determining the direction toward interference sources (e.g., other users) is added. The radiation pattern can then be adjusted to null out the interferers. In addition, by using special algorithms and space diversity techniques, the radiation pattern can be adapted to receive multipath signals which can be combined. These techniques will maximize the signal to interference ratio (SIR) (or signal to interference and noise ratio (SINR)).

Conventional mobile systems usually employ some sort of antenna diversity (e.g., space or polarization diversity).


...so, the question is: what level of intelligence are you targeting?

If you just want use polarization diversity (antenna diversity) I think that the first paper must be that you are looking for

yet waiting for experts opinion

best regards :)

hmm.. that's good! when can u gimme the review paper? i really appreciate it, thanx!

thanx ninhawk, btw i've already got the paper, about the level of intelligence, i don't set any target, if possible i wanna do all kind of intellegince defined, now i'm in the phase of studying the microstrip patch antenna, then moving to array.

I have the same question about DBF in tracking radar using monopulse,which book or paper should i read first,thans for your advice.

Best regards!

dalila, are you going to design and fabricate the smart antenna? or design only?

Hi All

Hopefully this link could help.

http://www.ansoft.com/thewave/New_In...a_analysis.pdf

Thank you

I am working on Smart Antenna in CDMA, I need some pepers about thiscategory and CDMA environment smart antennas. one of them

S. Choi and D. Shim, ?A novel adaptation beamforming algorithm for a
smart antenna system in a CDMA mobile communication environment,?
IEEE Trans. Veh. Technol., vol. 49, pp. 1793-1806, Sept. 2000.

Can you send it to me?

Added after 1 minutes:

my emai:bargh_fk@yahoo.com