Normal-mode helical antenna (NMHA) structure and electrical current model. | Download Scientific Diagram
![Three-dimensional power patterns for helical antenna (a) normal mode... | Download Scientific Diagram Three-dimensional power patterns for helical antenna (a) normal mode... | Download Scientific Diagram](https://www.researchgate.net/publication/331357481/figure/fig2/AS:732732535607297@1551708458290/Three-dimensional-power-patterns-for-helical-antenna-a-normal-mode-and-b-axial-also.jpg)
Three-dimensional power patterns for helical antenna (a) normal mode... | Download Scientific Diagram
![Figure 2 from Normal mode 3.3GHz bifilar helical antenna for wireless communication | Semantic Scholar Figure 2 from Normal mode 3.3GHz bifilar helical antenna for wireless communication | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/e6e5c96124f4ebe0f8271ad5189fb4470d46d266/2-Figure2-1.png)
Figure 2 from Normal mode 3.3GHz bifilar helical antenna for wireless communication | Semantic Scholar
![What is Helical Antenna? Construction, Working, Advantages, Disadvantages and Applications - Electronics Desk What is Helical Antenna? Construction, Working, Advantages, Disadvantages and Applications - Electronics Desk](https://electronicsdesk.com/wp-content/uploads/2020/04/structure-of-helical-antenna.jpg)
What is Helical Antenna? Construction, Working, Advantages, Disadvantages and Applications - Electronics Desk
![Figure 1 from Normal mode helical antenna at 1.8 GHz with small circular ground plane | Semantic Scholar Figure 1 from Normal mode helical antenna at 1.8 GHz with small circular ground plane | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/b89c360665588a42ce23cbbbce96cea6217ceb85/1-Figure1-1.png)
Figure 1 from Normal mode helical antenna at 1.8 GHz with small circular ground plane | Semantic Scholar
![Physical model. (a) Axial-mode helix mounted on a large ground plane.... | Download Scientific Diagram Physical model. (a) Axial-mode helix mounted on a large ground plane.... | Download Scientific Diagram](https://www.researchgate.net/publication/268436446/figure/fig1/AS:295441095774209@1447450054403/Physical-model-a-Axial-mode-helix-mounted-on-a-large-ground-plane-b-Image-theory.png)