Title :
A broadband monopole in a parallel plate waveguide
Author :
Chen, Zhi Ning ; Hirasawa, Kazuhiro ; Wu, Ke
Author_Institution :
Inst. of Inf. Sci. & Electron., Tsukuba Univ., Ibaraki, Japan
Abstract :
A new kind of top-sleeve is designed to greatly enhance the bandwidth of a monopole operating in a parallel plate waveguide. A modal expansion technique is extended to numerically evaluate the characteristics of the monopole with a top-sleeve. Based on the numerical simulations, a prototype of a monopole with a top-sleeve is made for 5.8 GHz applications. The relevant measurements validate the numerical simulations and engineering design. Compared to traditional structures, this modified monopole has a merit of a very broad impedance bandwidth with a good match and still maintains the feature of simple structure, low cost, and pure polarization
Keywords :
Fourier series; antenna feeds; antenna theory; boundary-value problems; impedance matching; modal analysis; monopole antennas; waveguide antennas; Fourier least squares integration; Smith chart; VSWR; boundary conditions; broad impedance bandwidth; broadband monopole; continuity conditions; cylindrical harmonic functions; engineering design; enhanced bandwidth; low cost; modal expansion technique; modified monopole; numerical simulations; parallel plate waveguide; simple structure; top-sleeve design; Bandwidth; Costs; Design engineering; Dielectrics; Impedance; Magnetic fields; Maintenance engineering; Numerical simulation; Polarization; Virtual prototyping;
Conference_Titel :
Microwave Conference, 1999 Asia Pacific
Print_ISBN :
0-7803-5761-2
DOI :
10.1109/APMC.1999.833696
