.png){kind=icon}
.png){kind=icon}
Return
Flexible Electrically Small Yagi–Uda Antenna With Enhanced Bandwidth
.png){kind=icon}
PRE
AI
Q
M
M
R
DOI：10.1109/lawp.2026.3696407.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
This letter presents a flexible electrically small (ES) Yagi–Uda antenna featuring a substantially enhanced bandwidth. A printed slow-wave transmission line (SW-TL)-based curved periodic grid is developed. It enables a low-frequency resonance in spite of the structure's ES size. The antenna adopts a classic Yagi–Uda configuration, comprising a driven element and a reflector both implemented as curved SW-TLs, plus a director. The mutual couplings between these elements facilitate the generation of three overlapping resonant modes, whose combination yields an exceptionally wide operational bandwidth. The optimized prototype was fabricated and tested. Its electrical size was <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ka</i> = 0.94 < 1. In good agreement with simulations, the measured results confirm an impedance bandwidth of 36.9% (|<italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">S</i><sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub>| < −10 dB) that encompasses a unidirectional bandwidth [front-to-back ratio (FTBR) > 10 dB] of 29.4%. Furthermore, it is demonstrated that this ES Yagi–Uda antenna is highly flexible, maintaining very stable performance characteristics under various bending conditions.
Keywords:
Electrically small antenna (ESA)
enhanced bandwidth
flexibility
slow-wave transmission line (SW-TL)
Yagi–Uda antenna
Journal
IF:
4.8
Papers:
1.0W
Citations:
2.8W
Organization
Cited Papers