• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
Impedance for Various Lengths of Open Lines
Impedance of Various Lengths of Shorted Lines

Neets Module 10-Introduction to Wave Propagation, Transmission Lines, and Antennas
Page Navigation
  130    131    132    133    134  135  136    137    138    139    140  
3-41 Figure 3-32.—Voltage, current, and impedance on open line. $W DOO RGG TXDUWHU ZDYH SRLQWV                  HWF    WKH YROWDJH LV PLQLPXP  WKH FXUUHQW LV PD[LPXP and the impedance is minimum. Thus, at all odd quarter-wave points, the open-ended transmission line acts as a series-resonant circuit. The impedance is equivalent to a very low resistance, prevented from being zero only by small circuit losses. $W DOO HYHQ TXDUWHU ZDYH SRLQWV                        HWF    WKH YROWDJH LV PD[LPXP  WKH FXUUHQW LV minimum, and the impedance is maximum. Comparison of the line with an LC resonant circuit shows that at an even number of quarter-wavelengths, an open line acts as a parallel-resonant circuit. The impedance is therefore an extremely high resistance. In addition, resonant open lines may also act as nearly pure capacitances or inductances. The illustration shows that an open line less than a quarter-wavelength long acts as a capacitance. Also, it acts






Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.