Abstract: A display apparatus for real-time radiation pattern visualization comprises a positioning module, a radiation pattern measuring module and an image processing module. The positioning module is used to measure a distance of an object from the positioning module and locate the orientation of the object. The radiation pattern measuring module is used to receive radiation of the object. The image processing module is coupled with the positioning module and the radiation pattern measuring module, and processes the radiation to generate a stereoscopic radiation pattern signal. According to the distance and orientation of the object, the stereoscopic radiation pattern signal is displayed in the display interface for engineers in the workplace to estimate the calibration of the real-time radiation pattern.

Abstract: This invention relates to Pade approximation convert circuit of the direct digital frequency synthesizer in which a multiplier receives and multiplies a first input signal and a variable signal so as to produce a multiplication signal; a divider receives and divides a second input signal and a variable signal so as to produce a division signal; an adder receives and adds the multiplication signal and the division signal so as to generate an output signal, that is then returned back to the divider. A quarter period of a sinusoidal wave signal is completed by the proceeding of direct calculation two times such that the time for the calculation of a complete sinusoidal wave can be saved and the area of the calculation circuit can be reduced.

Abstract: This invention relates to Pade approximation convert circuit of the direct digital frequency synthesizer in which a multiplier receives and multiplies a first input signal and a variable signal so as to produce a multiplication signal; a divider receives and divides a second input signal and a variable signal so as to produce a division signal; an adder receives and adds the multiplication signal and the division signal so as to generate an output signal, that is then returned back to the divider. A quarter period of a sinusoidal wave signal is completed by the proceeding of direct calculation two times such that the time for the calculation of a complete sinusoidal wave can be saved and the area of the calculation circuit can be reduced.