首页   按字顺浏览 期刊浏览 卷期浏览 An Alternative Method of Solving Halle´n's Integral Equation and Its Application ...
An Alternative Method of Solving Halle´n's Integral Equation and Its Application to Antennas Near Resonance

 

作者: Ronold King,  

 

期刊: Journal of Applied Physics  (AIP Available online 1953)
卷期: Volume 24, issue 2  

页码: 140-147

 

ISSN:0021-8979

 

年代: 1953

 

DOI:10.1063/1.1721228

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Halle´n's complex integral equation for the current in a cylindrical antenna is separated into two real integral equations for the components of current in phase and in phase‐quadrature with the driving voltage. Each of these equations is solved by iteration using zeroth‐order currents and vector‐potential differences to define expansion parameters. It is shown that for electrical half‐lengths near odd multiples of a quarter‐wavelength at least a third‐order solution is required in order to determine accurately the component of current in phase with the driving voltage and the conductance. Conductances for a range of radii are evaluated by the new third‐order formula and compared with the King‐Middleton second‐order values and with the experimental data of Hartig. The new formula agrees excellently with experimental results ath=&lgr;0/4, whereas the earlier second‐order formula has by far its greatest percent error—near 8 to 10 percent—in a small range near resonance. It is concluded that for antennas near resonance, just as for very short and very long antennas, adequate account must be taken in the iteration of both components of current.

 

点击下载:  PDF (481KB)



返 回