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Design of Broadband CPW-Fed Square Slot Antennas  

Choi, Soon-Shin (Department of Electronics, Sogang University)
Kim, Joon-Il (Department of Electronics, Sogang University)
Jee, Yong (Department of Electronics, Sogang University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.42, no.11, 2005 , pp. 107-115 More about this Journal
Abstract
This paper presents the structure of a broadband coplanar waveguide(CPW) fed square slot antenna with a impedance bandwidth tuning patch. The designing method of the antenna suggests that two resonant frequencies are excited as a dual-frequency dipole antenna following the dimensions of the square slot. In other words, the lower resonant frequency mainly depends on the slot width and the higher one its length. A CPW fed square slot antenna with a impedance tuning patch was measured to $20GHz^\~33GHz$, $50\%$, VSWR=2 impedance bandwidth by adjusting the dimensions of the tuning patch when the slot length had $70\%$ of its width. This result shows that a medical CPW fed antenna is easily implemented with a simple square slot structure including a bandwidth tuning patch in the center.
Keywords
Boardband antenna; coplanar waveguide; square slot antenna;
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