Open AccessUltra‐small Marker Beacon Antenna with a Wide Frequency Tuneable Capacitive Plate
Author(s) -
Park JuDerk,
Choi ByeongCheol,
Kim Nam,
Jung YoungBae
Publication year - 2016
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.16.0116.0158
Subject(s) - capacitive sensing , antenna (radio) , antenna tuner , capacitor , acoustics , variable capacitor , impedance matching , dipole antenna , antenna factor , electrical engineering , materials science , electrical impedance , optoelectronics , optics , physics , engineering , voltage
In this paper, an ultra‐small marker beacon antenna operated in the VHF‐band is proposed. This antenna has a modified linear IFA structure with a lumped capacitor and a capacitive plate for frequency tuning and impedance matching. The capacitive plate is directly connected to the end of a linear radiator and is separated from the antenna ground by 1 mm. The main operating frequency is mainly controlled by the size and dielectric constant of the capacitive plate. The lumped capacitor is useful for fine frequency tuning. Using the proposed structure, an ultra‐small marker beacon antenna can be realized with a length of 0.04 λ 0 .