Title :
Increasing the bandwidth of a meander line antenna consisting of two strips
Author :
Noguchi, K. ; Mizusawa, M. ; Yamaguchi, T. ; Okumura, Y.
Author_Institution :
Div. of Electr. Eng. & Electron., Kanazawa Inst. of Technol., Ishikawa, Japan
Abstract :
Small antennas for handsets in personal communication systems are required. A meander line antenna (MLA) can be used in such systems. The input impedance of the MLA can be easily matched by use of impedance step-up and balance mode impedance loading. But increasing the bandwidth of an MLA through the use of a two-strip geometry has not been accomplished so far. A method for increasing the bandwidth of the 2-strip MLA is described. An equivalent circuit of the MLA is represented by use of the balance mode impedance as an open- or short-circuited shunt stub. On the basis of the equivalent circuit, a numerical analysis of the impedance characteristics of the 2-strip MLA is carried out. In the analysis, the contribution of the parameters of the 2-strip MLA towards increasing the bandwidth are discussed.
Keywords :
electric impedance; equivalent circuits; impedance matching; mobile antennas; personal communication networks; telephone sets; balance mode impedance; balance mode impedance loading; bandwidth; equivalent circuit; handsets; impedance characteristics; impedance step-up; input impedance matching; meander line antenna; numerical analysis; open-circuited shunt stub; parameters; personal communication systems; short-circuited shunt stub; small antennas; two-strip geometry; Analytical models; Bandwidth; Equivalent circuits; Geometry; Impedance matching; Numerical analysis; Resonant frequency; Telephone sets; Transmission line antennas; Wire;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1997. IEEE., 1997 Digest
Conference_Location :
Montreal, Quebec, Canada
Print_ISBN :
0-7803-4178-3
DOI :
10.1109/APS.1997.625405
