when the antenna VSWR exceeds 2.0:1. This can even, in some extreme cases, result in the coaxial cable burning, even when running 100 W. Using a higher grade of cable will definitely improve things, but even high quality coaxial cable becomes very lossy when VSWR exceeds 3.0:1 at...
11. The operational bandwidth of the final structure corresponded to the 0.3–1.0 GHz range with VSWR less than 5. Despite the design's complexity, laboratory experiments in an oil cell for two internal defects (corona discharge in UHF range and superficial discharge) yielded positive results in...
F1 (MHz) F2 (MHz) VSWR Gain (dB) Efficiency Max Typical Range +/- Avg Range +/- 2400 4900 2500 5900 1.3 1.5 9.1 11.4 7.2 9.1 1.9 2.3 74% 59% 74% 14% The following notes apply to the tables provided: Not...
The simulation analysis shows that for the 4 × 4 multi-mode shortwave broadband transmitting antenna array, the gain obtained is 12–23.5 dB in the 4.4–27.4 MHz frequency band, and the VSWR for each mode is lower than 2.5. The radiation patterns at 5.9 MHz and 4.4 MHz on a ...
VSWR variation over UWB range Full size image 3.2 Time domain behavior The performance of the antenna in time domain is also essential to analyze. The behavior of antenna in the time domain can be understood with time domain parameters of Fidelity Factor, Group delay and Mean Realized Gain (Fi...
In the presented work VSWR is chosen for the criteria of 2:1. Parametric iterations in MIMO antenna design provide the benefits of optimizing antenna performance, customization for specific applications, efficient resource utilization, comprehensive trade-off analysis, and enhanced structure robustness. ...
the lower tuning rod 15 provides a means for operating the antenna in this situation. The lower tuning rod 15 interacts with the portion of the antenna below the gap 7 to create a balanced current flow both above and below the gap 7 and a matched VSWR condition approaching 1:1 to 1 at...
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Although both antenna elements 2908, 2910 co-exist in close proximity, the high VSWR due to the slot 2906 at the primary transmit antenna element 2908 reduces the coupling to the primary antenna element source resistance at the frequency to which the slot 2906 is tuned, and therefore provides ...
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