Open AccessCompact 433 MHz antenna for wireless smart system applications
Author(s) -
Buckley J.,
Gaetano D.,
McCarthy K.G.,
Loizou L.,
O'Flynn B.,
O'Mathuna C.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.4312
Subject(s) - omnidirectional antenna , ground plane , electrical engineering , monopole antenna , stub (electronics) , microstrip antenna , capacitive sensing , patch antenna , acoustics , antenna (radio) , physics , engineering
A compact, planar antenna operating at 433 MHz is proposed for wireless smart systems with dimensions of 51 × 28 mm 2 including a ground plane, and printed on a low‐cost FR4 material. Significant size reduction is achieved using the variation of an inverted‐F antenna configuration with a square‐spiral section and rectangular patch element. Fine‐tuning of the antenna's resonant frequency is possible using a small capacitive stub. Sensor and radio transceiver electronics can be accommodated above the ground plane. The measured results indicate a 10 dB return loss bandwidth of 4.5 MHz, and a peak realised gain of −13 dBi with omnidirectional radiation characteristics.