A dual-band omnidirectional circularly polarized antenna is proposed. The antenna comprises back-to-back microstrip patches fed by a coplanar waveguide. A very low frequency ratio of 1.182 has been achieved, which can be easily tuned by adjusting fo
最新数学手册，内容可拷贝。 Contents 1 Engineering Conversions, Constants and Symbols 1 1.1 General conversions 1 1.2 Greek alphabet 2 1.3 Basic SI units, derived units and common prefixes 3 1.4 Some physical and mathematical constants 5 1.5 Recommended mathemati
The IF_XS-2W series are specially designed for applications where a group of polar power supplies are isolated from the input power supply in a distributed power supply system on a circuit board.
Highcharts is a charting library written in pure HTML5/Javascr ipt, offering intuitive, interactive charts to your web site or web application. Highcharts currently supports line, spline, area, areaspline, column, bar, pie, scatter, angular gauges,
Contents I Basics of MATLAB 1 First Steps in MATLAB 1.1 Starting MATLAB 1.2 First Steps 1.3 Matrices 1.4 Variables 1.5 The Colon Operator 1.6 Linspace 1.7 Plotting Vectors 2 Typing into MATLAB 2.1 Command Line Editing 2.2 Smart Recall 2.3 Long Lines
