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J Electromagn Eng Sci > Volume 16(4); 2016 > Article
Journal of Electromagnetic Engineering and Science 2016;16(4):248-253.
DOI: https://doi.org/10.5515/JKIEES.2016.16.4.248   
Miniaturization of SIW-Based Linearly Polarized Slot Antennas for Software-Defined Radar
Jun Yong Han1, Seong Sik Yoon2, Jae Wook Lee2
1Center of ISR.PGM, Hanwha Systems
2School of Electronics and Information Engineering, Korea Aerospace University
Correspondence:  Jae Wook Lee,Email: jwlee1@kau.ac.kr
Abstract
Two substrate integrated waveguide (SIW)-based antennas for the application of software-defined radar are proposed and investigated herein. It is usually well known that SIWs are easily integrated, lightweight, have low insertion loss, and low interference levels compared to conventional microstrip structures. The primary function of the proposed antennas is to transmit continuous waves for indoor motion detection, with the lowest amount of loss and an appropriate amount of gain. Moreover, the results of this study show that the size of the antenna can be reduced significantly (i.e., by about 40%) by applying a meander line structure. The operating frequencies of the proposed antennas are both within the industrial, scientific, and medical band (i.e., 2.4-2.4835 GHz). Measured results of return loss are -16 dB and -20 dB at 2.435 GHz and 2.43 GHz, respectively, and the measured gain is 8.2 dBi and 5.5 dBi, respectively. Antenna design and verification are undertaken through commercially available full electromagnetic software.
Key words: Linear Polarization (LP), Meander Line, Slot Antenna, Software-Defined Radar (SDR), Substrate Integrated Waveguide (SIW)

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