microwave propagation
91Harald T. Friis — Infobox Scientist name = Harald T. Friis caption = birth date = 1893 birth place = Naestved, Denmark death date = 1976 death place = Palo Alto, California residence = United States nationality = American field = Electrical engineering work… …
92light — light1 lightful, adj. lightfully, adv. /luyt/, n., adj., lighter, lightest, v., lighted or lit, lighting. n. 1. something that makes things visible or affords illumination: All colors depend on light. 2. Physics …
93Polaritonics — is an intermediate regime between photonics and sub microwave electronics (see Fig. 1). In this regime, signals are carried by an admixture of electromagnetic and lattice vibrational waves known as phonon polaritons, rather than currents or… …
94electron tube — an electronic device that consists, typically, of a sealed glass bulb containing two or more electrodes: used to generate, amplify, and rectify electric oscillations and alternating currents. Also called electronic tube. Cf. gas tube, vacuum tube …
95Early ITU Model — The ITU Vegetation Model is a radio propagation model that estimates the path loss encountered due to the presence of one or more trees inside a point to point telecommunication link. The predictions found from this model is congruent to those… …
96Near-field electromagnetic ranging — (NFER) refers to any radio technology employing the near field properties of radio waves as a Real Time Location System (RTLS). Contents 1 Overview 2 Technical Discussion 2.1 Advantages …
97Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
98Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
99Wi-Fi — For the radio station, see WIFI (AM). Wi Fi logo Wi Fi (  / …
100Crystal radio — Crystal set redirects here. For the Australian rock band, see The Crystal Set. A modern reproduction of an antique crystal set. It is tuned to different stations by moving the sliding contact (right) up and down the tuning coil (red). The device… …
