Title :
Approximate formula of the lowest-order TM mode of a pentagonal waveguide family
Author :
Zheng, Qinhong ; Peng, Jinhui ; Yao, Bin ; Zhong, Runeng ; Xu, Wansong ; Xiang, Tai ; Li, Lin
Author_Institution :
Sch. of Phys. & Electron. Inf., Yunnan Normal Univ., Kunming, China
Abstract :
Based on two inequalities, the upper and lower bounds of the cutoff wavenumber of the lowest-order TM mode of a pentagonal waveguide family are derived. By means of taking the geometric mean value, an approximate formula to calculate the cutoff wavenumber of the lowest-order TM mode of a pentagonal waveguide family is developed. It is the function of the cross section geometric parameters of the pentagonal waveguide. Comparisons between the results obtained by the approximate formula and the available numerical published data fully validate accuracy of the approximate formula.
Keywords :
geometry; waveguides; cross section geometric parameters; cutoff wavenumber; geometric mean; lowest-order TM mode; pentagonal waveguide; Accuracy; Approximation methods; Hollow waveguides; Microwave antennas; Microwave theory and techniques; Waveguide theory; TM mode; approximate formula; cutoff wavenumber; pentagonal waveguide;
Conference_Titel :
Mechanic Automation and Control Engineering (MACE), 2011 Second International Conference on
Conference_Location :
Hohhot
Print_ISBN :
978-1-4244-9436-1
DOI :
10.1109/MACE.2011.5987120
