Title :
A novel microstrip slot antenna for permittivity measurement
Author :
Jackson, Beulah ; Jayanthy, T.
Author_Institution :
Sathyabama Univ., Chennai, India
Abstract :
A compact Microstrip slot antenna is designed for 2.4GHz frequency and presented in this paper. The proposed antenna structure has multiple slots. The designed antenna is fabricated using FR4 substrate with 1mm thickness. This antenna has been implemented as a sensor for the measurement of dielectric constant of a liquid sample. The radiation characteristics and return loss are also analyzed. It is shown that the proposed antenna has relatively stable omni directional radiation pattern in the H plane and bidirectional radiation pattern in the E-plane and the return loss is above -14dB in the frequency range of 700 MHz-2.94GHz. As slot antennas are less sensitive to manufacturing tolerances compared to patch antenna it is well suited for industrial applications. The proposed resonator is fabricated and experimentally verified. A calibration equation relating the measured shift in resonant frequency and the dielectric constant has been established for determining permittivity.
Keywords :
UHF antennas; UHF measurement; antenna radiation patterns; calibration; frequency measurement; microstrip antennas; omnidirectional antennas; permittivity measurement; sensors; slot antennas; E-plane; FR4 substrate; H plane; bidirectional radiation pattern; calibration; dielectric constant measurement; frequency 700 GHz to 2.94 GHz; liquid sample; microstrip slot antenna; omnidirectional radiation pattern; patch antenna; permittivity measurement; radiation characteristics; resonant frequency measurement; return loss analysis; sensor; size 1 mm; slot antenna structure; Antenna measurements; Dielectric constant; Liquids; Permittivity; Permittivity measurement; Resonant frequency; Microstrip; curve fitting; dielectric constant; return loss; sensor; slot antenna;
Conference_Titel :
Information Communication and Embedded Systems (ICICES), 2014 International Conference on
Conference_Location :
Chennai
Print_ISBN :
978-1-4799-3835-3
DOI :
10.1109/ICICES.2014.7034072
