Transcription of CHAPTER 3: ANTENNAS - MIT OpenCourseWare
{{id}} {{{paragraph}}}
Example: barber
CHAPTER 3: ANTENNAS - MIT OpenCourseWare
97 CHAPTER 3: ANTENNAS ANTENNAS couple propagating electromagnetic waves to and from circuits and devices, typically using wires (treated in Section ) or apertures (treated in Section ). In practice complicated solutions of Maxwell s equations for given boundary conditions are usually not required for system design and analysis because the antenna properties have already been specified by the manufacturer, and must only be understood. Section characterizes these general transmitting and receiving properties of ANTENNAS , which are derived in subsequent BASIC antenna PROPERTIES Most ANTENNAS reversibly link radiation fields to currents flowing in wires at frequencies ranging from sub-audio through the far-infrared region. Aperture ANTENNAS that link radiation fields to materials can operate in microwave, infrared, visible, ultraviolet, X-ray, gamma ray, and even higher energy regimes.
transmitter power PTwere radiated isotropically. That is: R T Pf, , Gf,, Df,, P4 ' TI TI K TI S (3.1.3) Sometimes the term “gain over isotropic” is used to facilitate memorization of the definition. In cases where the absolute values of the gain or directivity are no of interest the antenna
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: