Abstract
This article presents an efficient yet simple design approach to highly miniaturized cavity-backed self-diplexing antenna (SDA) with high-isolation. The structure employs a shielded quarter-mode substrate integrated waveguide (QMSIW). Two U-shaped slots are engraved on the top conducting plane, which realize two frequency bands and significant size reduction. The slots are excited by two independent 50Ω orthogonal feed-lines to achieve high isolation while enabling radiation at 3.5 GHz and 5.4 GHz. The proposed design approach allows us to design the two frequency bands independently from each other. The SDA structure is verified using an equivalent circuit model, full-wave electromagnetic (EM) analysis, and experimental validation of the antenna prototype. Excellent consistency between simulated and measured responses has been demonstrated. According to the measurement, the SDA has peak gains of 5.26/5.60 dBi at 3.5/5.4 GHz, and the return loss better than 21.6 dB. The isolation between ports is greater than 40 dB, whereas excellent front-to-back-ratio and co-to-cross polarization are obtained for the proposed SDA. Furthermore, the total size of the SDA is only 0.129 λ2, with λ being the guided wavelength at 3.5 GHz.
Highlights
With the accelerated evolution of advanced wireless networking technologies, low cost, low-profile, and highperformance planar dual-band antennas are in greater demand
One of possible solution approaches are selfdiplexing antennas (SDAs), which have become useful in achieving high isolation, size miniaturization, and the best overall microwave components for many applications [1]
In [4], a lightweight self-diplexing inverted U-shaped slot antenna has been realized on the substrateintegrated waveguide (SIW) cavity for high isolation
Summary
With the accelerated evolution of advanced wireless networking technologies, low cost, low-profile, and highperformance planar dual-band antennas are in greater demand. One of possible solution approaches are selfdiplexing antennas (SDAs), which have become useful in achieving high isolation, size miniaturization, and the best overall microwave components for many applications [1]. Another potentially attractive approach is the substrateintegrated waveguide (SIW) technology. As a matter of fact, many self-diplexing antennas that ensure sufficient isolation, size reduction, and radiation performance, are being developed in the SIW technology [3,4,5,6,7,8,9,10,11,12]. In [6], a SDA has been realized by applying two rectangular-slots on the top surface of the SIW cavity for VOLUME XX, 2017
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
