Figure 3 from The radiation properties of electrically small folded spherical helix antennas | Semantic Scholar
Monopole Antenna - an overview | ScienceDirect Topics
Antenna Theory - Helical
Electrically small folded spherical helix antennas using copper strips and 3D printing technology - Kong - 2016 - Electronics Letters - Wiley Online Library
A comparison of electrically small HF antennas | Semantic Scholar
Antenna Design and Propagation Channel Characterization
Eng | Free Full-Text | Far-Field Radiation Characteristics of Folded Monopole Antennas over a Conducting Ground Plane
Dimensions of a spherical helix antenna that operates at 1.12 GHz. | Download Scientific Diagram
The radiation properties of electrically small folded spherical helix antennas | Semantic Scholar
PDF] Novel Quadrifilar Helix Antenna combining GNSS, Iridium, and a UHF communications monopole | Semantic Scholar
Folded unipole antenna - Wikipedia
Monopole Antenna - an overview | ScienceDirect Topics
Electrically small folded spherical helix antennas using copper strips and 3D printing technology - Kong - 2016 - Electronics Letters - Wiley Online Library
Folded conical helix antenna
Bioinspired DNA Origami Quasi-Yagi Helical Antenna with Beam Direction and Beamwidth Switching Capability | Scientific Reports
Side fed bifilar helix Antenna placed within passive quadrifilar. | Download Scientific Diagram
A low-profile top-loaded folded helical antenna | Semantic Scholar