to nije dipol to je OMNI antena za 2.4GHz. svaki clanak u njoj je je polu valni nosioc frekvencije 1/2 vala
tako vezani clanci stvaraju pojacanje signala oko 12dB u RX ili TX modu.
http://wireless.gumph.org/articles/homemadeomni.html2 jack
objasni mi na ovo, kako to tumacis vodu?
Accoring to b.p. lathi's MODERN DIGITAL AND ANALOGUE COMMUNICATION SYSTEMS, third edition
page number 11
line number 3-4
"for efficient radiation of electromagnetic energy the radiating antenna should be of the order of one-tneth or more the wavelength of signal radiated"
and according to frequecny- wavelength relationship...
we know
Frequency * wavelength = speed of light
frequency = (speed of light)/ (wavelength)
so as u increase ur frequency, ur wavelength decreases causing the product of both equals to speed of light (constant). and as wavelength decreases, its corresponding size of antenna also decreases, ultimately the result comes out to be,
INCREASE IN FREQUENCY CAUSES SIZE OF ANTENNA TO DECREASE.
i ovo?
http://www.madsci.org/posts/archives/20 ... .Ph.r.htmlcini se da nas nas WIFI mreza na perfidan naci rastura a mi smo sazdani od vode kao i sve oko nas..
zanimljivo je da koristenje 2.4GHz besplatno... kao i 5GHz
Suffice it to say that most microwave ovens put out a frequency of 2.5 gigahertz. This means that these microwaves pulse 2,500,000,000 times per second. This isn't the lowest (also known as "primary") resonant frequency for water, but microwave manufacturers use 2.5 GHz because they want the microwave to work at any and all water temperatures. There's lots more techno-babble about resonance, matching, and the engineering of microwaves, but that'll have to be a separate question.