Modeling of VHF Current Conversion From Excited Antenna Mode to Differential Mode at Transmission Line Terminals
| Autor: | Sumei Sun, Yi Huang, Xu Zhu, Mohammad Heggo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Engineering
business.industry 020209 energy Antenna measurement 020206 networking & telecommunications 02 engineering and technology Antenna factor Condensed Matter Physics Antenna tuner Topology Atomic and Molecular Physics and Optics Characteristic impedance Antenna efficiency law.invention law 0202 electrical engineering electronic engineering information engineering Electronic engineering Helical antenna Dipole antenna Electrical and Electronic Engineering Antenna (radio) business |
| Zdroj: | IEEE Transactions on Electromagnetic Compatibility |
| ISSN: | 0018-9375 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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