# A Strongly Miniaturized and Inherently Matched Folded Dipole Antenna for Narrowband Applications

## TL;DR

This paper presents a novel miniaturized folded dipole antenna with inherent impedance matching, achieving significant size reduction and improved performance for narrowband sensing applications, validated through experiments.

## Contribution

It introduces a systematically engineered, inherently matched folded dipole antenna with 75% miniaturization and enhanced gain and efficiency, eliminating the need for external matching networks.

## Key findings

- Approximately 75% size reduction compared to traditional designs.
- Over 24 dB higher realized gain than unloaded dipole.
- Excellent agreement between experimental results and simulations.

## Abstract

A novel miniaturized printed folded dipole antenna has been designed for narrowband sensing applications. It is shown that the antenna may be systematically engineered to achieve matching to a practical source impedance at frequencies well below its half-wavelength resonance using series-LC loading and asymmetrical arm widths. This approach is used to design an inherently well-matched antenna that does not require an external matching network and demonstrates approximately 75% miniaturization, excellent co- to cross-polarization separation, over 24 dB higher realized gain, and strongly improved radiation efficiency relative to an unloaded folded dipole of the same electrically small size. Experimental validation of a fabricated prototype demonstrates excellent agreement with simulations.

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Source: https://tomesphere.com/paper/1902.04745