A Wideband Reflectarray Antenna Using Substrate Integrated Coaxial True-Time Delay Lines for QLink-Pan Applications

This letter presents a substrate integrated waveguide (SIW) cavity-backed reflectarray (RA) antenna based on the true-time delay (TTD) technique for QLink-Pan applications. To suppress the effect of mutual coupling and improve the unit bandwidth of the return loss, a novel SIW cavity-backed E-shaped patch radiation element is proposed, which is fed by a low dispersive substrate integrated coaxial line. A parallel phase response covering 360° is obtained by only adjusting the length of the proposed feeding structure. As demonstrations, a Q-band center-fed RA prototype with a circular aperture of 14.04 cm diameter is designed, fabricated, and measured. The measured peak gain is 32.83 dBi at 43 GHz, and the 1 dB gain bandwidth is 12.94% (39.5–45 GHz). The good radiation performance ensures that the proposed SIW cavity-backed RA antenna is an appropriate candidate for long-distance applications of the QLink-Pan wireless system.

[1]  J. Encinar,et al.  Bandwidth Improvement in Large Reflectarrays by Using True-Time Delay , 2008, IEEE Transactions on Antennas and Propagation.

[2]  Wei Hong,et al.  A Novel Planar Reconfigurable Monopulse Antenna for Indoor Smart Wireless Access Points’ Application , 2016, IEEE Transactions on Antennas and Propagation.

[3]  José A. Encinar,et al.  Broadband design of three-layer printed reflectarrays , 2003 .

[4]  Wenquan Che,et al.  A Low Cross-Polarization Reflectarray Antenna Based on SIW Slot Antenna , 2017, IEEE Antennas and Wireless Propagation Letters.

[5]  Ke Wu,et al.  A Novel Substrate Integrated Coaxial Line (SICL) for Wide-Band Applications , 2006, 2006 European Microwave Conference.

[6]  Yong-Chang Jiao,et al.  A Novel Microstrip Rectangular-Patch/Ring- Combination Reflectarray Element and Its Application , 2009, IEEE Antennas and Wireless Propagation Letters.

[7]  Ke Wu,et al.  Review of substrate-integrated waveguide circuits and antennas , 2011 .

[8]  Xiaoning Ye,et al.  Wide-band E-shaped patch antennas for wireless communications , 2001 .

[9]  Jianyi Zhou,et al.  Wideband Low-Profile Substrate Integrated Waveguide Cavity-Backed E-Shaped Patch Antenna , 2013, IEEE Antennas and Wireless Propagation Letters.

[10]  Fan Yang,et al.  A Single-Layer High-Efficiency Wideband Reflectarray Using Hybrid Design Approach , 2017, IEEE Antennas and Wireless Propagation Letters.

[11]  J. Encinar.  Design of two-layer printed reflectarrays using patches of variable size , 2001 .

[12]  Andrew R. Weily,et al.  Broadband Reflectarray Antenna Using Subwavelength Elements Based on Double Square Meander-Line Rings , 2016, IEEE Transactions on Antennas and Propagation.

[13]  Jafar Shaker,et al.  Reflectarray design comprised of sub-wavelength coupled-resonant square loop elements , 2011 .

[14]  J. Shaker,et al.  Broadband Design of a Single Layer Large Reflectarray Using Multi Cross Loop Elements , 2009, IEEE Transactions on Antennas and Propagation.

[15]  Quan Yuan,et al.  A Low-Profile Wideband Substrate-Integrated Waveguide Cavity-Backed E-Shaped Patch Antenna for the Q-LINKPAN Applications , 2017, IEEE Transactions on Antennas and Propagation.

[16]  Nader Behdad,et al.  Broadband True-Time-Delay Circularly Polarized Reflectarray With Linearly Polarized Feed , 2016, IEEE Transactions on Antennas and Propagation.