Design of a copper-tape-based impedance matching circuit for helical antennas using a Klopfenstein taper
Abstract
A practical copper-tape-based impedance matching circuit for helical antennas is presented, utilizing a Klopfenstein taper. The design uses standard acrylic cylinders and adhesive copper tape for low-cost fabrication without complex internal structures. The antenna achieves S11 < -10dB from 3.8 to 6.4GHz, covering the 5.65-5.85GHz range, with stable reflection coefficient characteristics. The insertion loss of the matching section was experimentally evaluated using a two-antenna method based on the Friis transmission equation, and was found to be less than 0.15dB per matching section in the target operating band. This approach demonstrates a reproducible and low-loss matching technique suitable for microwave axial-mode helical antennas.
Fields of Study & Subjects
Antenna Design and Analysis
Microwave Engineering and Waveguides
Advanced Antenna and Metasurface Technologies
Publication details
- Journal / source
- IEICE Electronics Express
- Volume
- 23
- Issue
- 7
- Pages
- 20250725–20250725
- Publication date
- 12 February 2026
- Language
- EN