Modeling of VHF Current Conversion From Excited Antenna Mode to Differential Mode at Transmission Line Terminals

Heggo, M, Zhu, X ORCID: 0000-0002-7371-4595, Huang, Y ORCID: 0000-0001-7774-1024 and Sun, S (2016) Modeling of VHF Current Conversion From Excited Antenna Mode to Differential Mode at Transmission Line Terminals. IEEE Transactions on Electromagnetic Compatibility, 58 (4). pp. 1184-1193.

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Abstract

The current induced by an incident electric field can convert from the antenna mode to differential mode at unbalanced terminals of transmission lines (TLs), causing severe interference to a number of applications such as broadband power line communication, especially in the very high frequency (VHF) band. The previous work on modeling the current conversion is not applicable to VHF. We present a new model of the VHF current conversion which includes a general formula for the antenna mode characteristic impedance and two solutions to the formulated problem: 1) a numerical solution referred to as the antenna theory numerical (ATN) approach, which gives the exact value of the characteristic impedance; 2) an analytical solution referred to as the enhanced TL approximation (ETLA) approach, which gives the mean of the characteristic impedance. This is the first reported work to obtain the antenna mode characteristic impedance by the antenna theory. Furthermore, the ETLA approach outperforms the previous frequency-independent solution and requires a reduced complexity over the ATN approach. Our model is general as it converges to the previous model at lower frequencies. Simulation results also show the relationship between the antenna mode characteristic impedance and the power of the interference caused by the current conversion.

Item Type:	Article
Uncontrolled Keywords:	Antenna theory, electric field effects, electromagnetic interference (EMI), transmission line modeling, transmission line theory, VHF radio communication
Depositing User:	Symplectic Admin
Date Deposited:	17 May 2017 06:43
Last Modified:	19 Jan 2023 07:04
DOI:	10.1109/TEMC.2016.2555334
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3007499

Available Versions of this Item

• Modeling of VHF Current Conversion From Excited Antenna Mode to Differential Mode at Transmission Line Terminals. (deposited 27 Oct 2016 09:25)
  • Modeling of VHF Current Conversion From Excited Antenna Mode to Differential Mode at Transmission Line Terminals. (deposited 17 May 2017 06:43) [Currently Displayed]