Patent ID: 7990322

Claim:
A shortened HF cylindrical microstrip antenna, comprising: a cylindrical, ceramic microstrip substrate; said cylindrical, ceramic microstrip substrate fits closely around a copper-coated cylindrical ground plane; a radiating patch having a patch section, a narrow section, a middle section, a center point, and a junction point; said patch section being wrapped partially around said cylindrical microstrip substrate; said narrow section being connected to a coaxial feed means; said junction point being located in said middle section to shorten an impedance transition length from said center point to a patch edge of said narrow section; said radiating patch, said cylindrical, ceramic microstrip substrate, and said copper-coated cylindrical ground plane being folded and interleaved into a corrugated alternating configuration; said impedance transition length reduces an effective resistive impedance near said junction point; and said junction point providing an electric field that decreases said impedance transition length to a decreased impedance transition length and said radiating patch and said copper-coated cylindrical ground plane being folded and interleaved into said corrugated alternating configuration provide an elongated radiating surface within a confined space allowing a shortened HF antenna length.