Trade-off Between Antenna Efficiency and Q-Factor
arXiv:1802.01476 · doi:10.1109/TAP.2019.2891448
Abstract
The trade-off between radiation efficiency and antenna bandwidth, expressed in terms of Q-factor, for small antennas is formulated as a multi-objective optimization problem in current distributions of predefined support. Variants on the problem are constructed to demonstrate the consequences of requiring a self-resonant current as opposed to one tuned by an external reactance. The resulting Pareto-optimal sets reveal the relative cost of valuing low radiation Q-factor over high efficiency, the cost in efficiency to require a self-resonant current, the effects of lossy parasitic loading, and other insights.
11 pages, 9 figures
References in corpus (10)
- Fundamental Efficiency Limits for Small Metallic Antennas
- Optimal Currents on Arbitrarily Shaped Surfaces
- Minimization of Antenna Quality Factor
- Fundamental limitations for antenna radiation efficiency
- Optimal Composition of Modal Currents For Minimal Quality Factor Q
- Stored energies in electric and magnetic current densities for small antennas
- Accurate and Efficient Evaluation of Characteristic Modes
- An investigation into the Gustafsson limit for small planar antennas using optimisation
- The Radiation Efficiency Cost of Resonance Tuning
- Dissipation Factors of Spherical Current Modes on Multiple Spherical Layers
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