Realization of a Second Harmonic Antenna for Rural Communications

In this research, an active antenna operated at the second harmonic 1LP frequency is investigated, and is implemented using microstrip antenna material.The antenna consists of a FET oscillator which plays as a fundamental frequency oscillator and a frequency multiplier, and a patch antenna resonated at the second harmonic frequency as the radiator.

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Aircraft 4D Trajectory Prediction in Civil Aviation: A Review

Aircraft four dimensional (4D, including longitude, latitude, altitude and time) trajectory prediction is a key technology for existing automation systems and the basis for future trajectory-based Show bridle operations.This paper firstly summarizes the background and significance of the trajectory prediction problems and then introduces the defini

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NONENZYMATIC BROWNING KINETIC REACTION AND ASCORBIC ACID DEGREDATION OF HEAT-TREATED ORANGE JUICE DURING STORAGE

The kinetics of ascorbic acid (AA) degradation and nonenzymatic Show bridle browning (NEB) of heat-treated single strength orange juice (OJ) over a temperature between 70-95 oC for 2-10 min.and stored under opaque condition at 4 and 20 oC for 2 months have been studied.Analysis of kinetic data by measuring absorbance at 420 nm (A420) suggested a ze

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