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Wideband Low-Profile Differential-Fed Patch Antennas with an Embedded SIW Cavity under Dual-Mode Resonance
Qianwen Liu1; Lei Zhu2; Jianpeng Wang1; Wen Wu1
Source PublicationIEEE Transactions on Antennas and Propagation

In this communication, a single-layer differentially fed microstrip patch antenna (MPA) with wide bandwidth and low profile is proposed. The proposed antenna is composed of a patch radiator and a substrate integrated waveguide (SIW) cavity. In this work, a square SIW cavity is concentrically embedded within a square patch radiator. Here, the two dominant resonant modes in the radiative patch resonator and nonradiative SIW cavity, namely, TM and TE, are both employed to achieve a wide impedance bandwidth under dual resonances. At first, the resonant properties of these two modes are investigated based on the cavity model theory. Then, their resonant frequencies are extensively discussed, aiming at reallocation of these two modes in proximity to each other by properly selecting the geometrical dimensions of the square patch resonator and SIW cavity. After that, the spacing between adjacent metallic pins of the SIW cavity is studied to reveal its influence on both radiation and bandwidth properties. As such, proper spacing is selected toward stable radiation gain over the whole band of operation. Finally, the feeding positions of the MPA are studied to determine the input impedance of the antenna toward wide impedance matching in a wideband. To verify the predicted results, a prototype antenna is fabricated and measured. The simulated and measured results are found in good agreement with each other and both of them illustrate that the proposed antenna achieves a wide bandwidth of about 11.43% at a center frequency of 3.5 GHz and a stable gain in the range of 8.09 to 9.04 dBi within the whole band. Moreover, this antenna is a low-profile structure with a height of 0.037 free-space wavelength.

KeywordDual Resonances Square Patch Antenna Substrate Integrated Waveguide (Siw) Cavity Wide Bandwidth
URLView the original
Indexed BySCIE
WOS Research AreaEngineering ; Telecommunications
WOS SubjectEngineering, Electrical & Electronic ; Telecommunications
WOS IDWOS:000470835700069
Scopus ID2-s2.0-85066975310
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Cited Times [WOS]:16   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
Corresponding AuthorLei Zhu
Affiliation1.Ministerial Key Laboratory of JGMT,Nanjing University of Science and Technology,Nanjing,210094,China
2.Department of Electrical and Computer Engineering,Faculty of Science and Technology,University of Macau,Macao
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Qianwen Liu,Lei Zhu,Jianpeng Wang,et al. Wideband Low-Profile Differential-Fed Patch Antennas with an Embedded SIW Cavity under Dual-Mode Resonance[J]. IEEE Transactions on Antennas and Propagation,2019,67(6):4235-4240.
APA Qianwen Liu,Lei Zhu,Jianpeng Wang,&Wen Wu.(2019).Wideband Low-Profile Differential-Fed Patch Antennas with an Embedded SIW Cavity under Dual-Mode Resonance.IEEE Transactions on Antennas and Propagation,67(6),4235-4240.
MLA Qianwen Liu,et al."Wideband Low-Profile Differential-Fed Patch Antennas with an Embedded SIW Cavity under Dual-Mode Resonance".IEEE Transactions on Antennas and Propagation 67.6(2019):4235-4240.
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