Details

Autor(en) / Beteiligte

• Li, Teng
• Chen, Zhi Ning

Titel

Wideband Substrate-Integrated Waveguide-Fed Endfire Metasurface Antenna Array

Ist Teil von

• IEEE transactions on antennas and propagation, 2018-12, Vol.66 (12), p.7032-7040

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2018

Link zum Volltext

• IEEE_Xplore

Quelle

IEEE/IET Electronic Library (IEL)

Beschreibungen/Notizen

• A vertically polarized substrate-integrated waveguide (SIW)-fed endfire metasurface antenna array is proposed for wideband operation. Each of the metasurfaces consists of <inline-formula> <tex-math notation="LaTeX">3\times 3 </tex-math></inline-formula> rectangular patches and is printed on the two surfaces of a single-layered substrate with a thickness of <inline-formula> <tex-math notation="LaTeX">0.16\lambda _{0} </tex-math></inline-formula> (where <inline-formula> <tex-math notation="LaTeX">\lambda _{0} </tex-math></inline-formula> is the wavelength at 32.65 GHz in free space). The antenna is fed at one side of metasurface by an open-end SIW for wideband endfire radiation. The proximity-coupled interdigital strips are introduced between the SIW and metasurface for fault-tolerant coupling. The wideband operating mechanism is revealed by studying the propagation mode and multiple resonant modes of metasurface. To verify the proposed antenna, a <inline-formula> <tex-math notation="LaTeX">1\times 4 </tex-math></inline-formula> array is presented with uniform excitation including two SIW Y junctions and an SIW T junction. Moreover, the connected SIW Y junction improved the impedance matching at the low frequencies based on the cavity mode analysis. The proposed design shows that the measured impedance bandwidth (10 dB return loss) is 26.6-38.7 GHz (37%) with the achieved gain of 9.1-13.8 dBi.