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wimax antenna design
HI, I THINK THAT YOU STILL IN THE ASSESMENT PHASE OF YOUR DESIGN PROJECT,WE MIGHT COOPERATE AND WORK THIS OUT.
FIRST OF ALL I NEED TO KNOW IF YOU READ THE IEEE802.16 STANDARDS CONCERNUNG WI-MAX AIR INTERFACE,AND AS YOU KNOW WI-MAX IS NLOS TECHNOLOGY,THIS GIVES US MORE SPACE...
Re: mobile radio
the TX/RX built in antenna of the mobile phone is designed to operate at the frequency range of the mobile radio standards of the air interface(GSM/UMTS).
So,to recieve commercial FM broadcasting,the head set it self will serve as dipole antenna at the range of ~100MHZ.
gsm transmission chain
GSM standards contain a lot of interfaces, systems and sub-systems, also various
Types of signals (voice, packet data, and control)...
Let me assume that you are asking about the:
• GSM/EDGE 900 MHz standards.
• Air-interface (up/down link)
• Circuit switching voice...
HI ..
THERE IS A LOT OF PARAMETERS THAT HAVE TO BE CONSEDIERD WHEN DESIGNING OR IMPLEMENTING AN ANTENNA:
* SPILL-OVER FACTOR.
*ANTENNA EFFECIENCY FACTOR.
*DIRECTIONAL GAIN.
* TRANSMITION IMPEDANCE
ISOLATORS ARE USED TO ISOLATE THE PATH OF THE RECIEVED AND TRANSSMITED AND DOWNLINK THEM TO THE IF STAGE OF THE MICROWAVE TRANCIVERS,ON THE OTHER HAND,COUPLERS ARE USED TO MATCH DIFFERIENT MEDIA OR CHANEELS TO GOTHER,THE WAVE GUIED TO SPACE,OR ANY OTHER TO COMPONENTS IN A MICROWAVE DEVICE...
Re: the side effect of mobile radiation on the human body???
:idea:ok m3almi,
ingeneral,all the EM signal contains frequency componenets in the RF range (or in other location of the frequency spectrum) has no effect on the living bodies unless these radiation are avaliable with strong density...
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