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Seperti yang kita sudah sedia maklum, dipole antenna adalah antenna ringkas yang boleh dibuat dari wayar dengan suapan tengah driven element. dipole antenna merupakan antenna dari 2 konduktor terdiri dari…
Following are the frequency ranges used in satellite communications. L-band (390 MHz-1.55 GHz) GPS satellites, satellite phones, misc commsats, SETI outer space exploration S-band (1.55-5.2 GHz) weather satellites, XM/Sirius radio…
The spectrum for transmission in singlemode optical fibers has been broken into the following wavelength ranges, or bands. Typically, the wavelengths transmitted in multimode fibers are around 850 and 1310…
The distance between crests of a wave. The wavelength determines the nature of the various forms of radiant energy that comprise the electromagnetic spectrum. For electromagnetic waves, the wavelength in…
The sudden change in pitch of a car horn as a car passes by (source motion) or in the pitch of a boom box on the sidewalk as you drive…
While search for something, i have found this website. i think is it good to share. an amateur vertical antenna web based calculator. http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=16291