A filter is widely used in overall RF system. There are many species and structures in filter. A filter seems to be simple, but there are many considerations to design filter. In this paper, we design microstrip bandpass filter which has bandwidth of 500 MHz and center frequency of 2.5 GHz. Alumina is used as substrate, and chromium is used as conductor. Final results are achieved as follows. Ins
compute the position of poles and zeros that we should place on desirable position by hand.
But the result was not the one we`ve wanted. It didn`t meet the requirements. So we tried to tune the gain of compensator and the pole-zero position
To eliminate the steady state error, we put the pole at the origin (integrator). And by trial and error, we could find the response we`ve wanted.
A top-secret, experimental, offensive/defensive military installation hidden away in the countryside outside Philadelphia, Pennsylvania.
CLOSE on a beautiful, intricate, state of the art computer panel as it is lifted out of a large console. A huge, dimly lit display board, sporting a galaxy of small running lights, looms above.
The panels removal creates a large, vulnerable opening, inside of wh
Of glowing honey-colored stones. Their shapes ABSTRACT as THE CAMERA EXAMINES air bubbles and crystalline patterns.
MOVING UP AND OVER this amber abstraction, the CAMERA FINDS unusual shapes and imperfections caught in the glassy stone: flecks of dirt, hairs, cracks. STILL MOVING. STARBURSTS OF LIGHT ricochet off the different surfaces of the stones.
CAMERA TURNS along a creamy stretch of amber.
1. 통신시스템의 일반적인 구조
신호를 공간으로 전송하고 멀리 떨어진 다른 위치에서 이 신호를 수신하기 위해 여러 가지 방법을 사용할 수 있다. 이를 위한 대표적인 것은 음파와 전자파(광파)를 이용하는 방법이다.
무선통신시템은 전자파를 주로 사용한다. 전자파는 공간에 전파할 때 몇 가지 특성