An Electronically Controlled Leaky-Wave Antenna Based on Corrugated SIW Structure With Fixed-Frequency Beam Scanning

A novel electronically controlled (EC) leaky-wave antenna (LWA) based on corrugated substrate integrated waveguide (CSIW) with fixed-frequency beam-steerable capability is presented in this letter. This structure is based on a CSIW structure with rectangular ring slots and metallic vias to the ground, which realizes two isolated dc equipotential planes. Each slot of the rectangular ring is loaded with a varactor diode, and thus the series and shunt capacitance are tunable by adjusting the dc bias voltage, which eventually results in beam scanning at a fixed frequency. The proposed antenna is a single-layer structure and has a simplified dc bias network, which merely needs an inductor and a short microstrip line. An EC beam-steerable CSIW LWA is designed and experimentally validated. It is experimentally demonstrated that the radiation angle ranges from −40.66° to 31.32° as the bias voltage is tuned from 32 V to 7.5 V at 4.5 GHz.

[1]  K. Eccleston,et al.  Mode Analysis of the Corrugated Substrate Integrated Waveguide , 2012, IEEE Transactions on Microwave Theory and Techniques.

[2]  Lei Zhu,et al.  Numerical de‐embedding and experimental validation of propagation properties of corrugated substrate integrated waveguide , 2016 .

[3]  Peng You,et al.  Hybrid Spoof Surface Plasmon Polariton and Substrate Integrated Waveguide Transmission Line and Its Application in Filter , 2017, IEEE Transactions on Microwave Theory and Techniques.

[4]  Sean V. Hum,et al.  An electronically tunable half-mode substrate integrated waveguide leaky-wave antenna , 2011, Proceedings of the 5th European Conference on Antennas and Propagation (EUCAP).

[5]  Peng Li,et al.  An Electrically Controlled CRLH-Inspired Circularly Polarized Leaky-Wave Antenna , 2017, IEEE Antennas and Wireless Propagation Letters.

[6]  Ke Wu,et al.  Integrated transition of coplanar to rectangular waveguides , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[7]  D. Jackson,et al.  Leaky‐Wave Antennas , 2008 .

[8]  T. Itoh,et al.  Composite Right/Left-Handed Substrate Integrated Waveguide and Half Mode Substrate Integrated Waveguide Leaky-Wave Structures , 2011, IEEE Transactions on Antennas and Propagation.

[9]  D. Guan,et al.  Scanning Rate Enhancement of Leaky-Wave Antennas Using Slow-Wave Substrate Integrated Waveguide Structure , 2018, IEEE Transactions on Antennas and Propagation.

[10]  R. Guzman-Quiros,et al.  Electronic Full-Space Scanning With 1-D Fabry–Pérot LWA Using Electromagnetic Band-Gap , 2012, IEEE Antennas and Wireless Propagation Letters.

[11]  Ke Wu,et al.  Understanding Leaky-Wave Structures: A Special Form of Guided-Wave Structure , 2013, IEEE Microwave Magazine.

[12]  Zhenghe Feng,et al.  A New Low Cost Leaky Wave Coplanar Waveguide Continuous Transverse Stub Antenna Array Using Metamaterial-Based Phase Shifters for Beam Steering , 2013, IEEE Transactions on Antennas and Propagation.

[13]  Peng You,et al.  Slow-Wave Half-Mode Substrate Integrated Waveguide Using Spoof Surface Plasmon Polariton Structure , 2018, IEEE Transactions on Microwave Theory and Techniques.

[14]  T. Itoh,et al.  Metamaterial-based electronically controlled transmission-line structure as a novel leaky-wave antenna with tunable radiation angle and beamwidth , 2004, IEEE Transactions on Microwave Theory and Techniques.

[15]  Zhenghe Feng,et al.  Reconfigurable 2-bit Fixed-Frequency Beam Steering Array Based on Microstrip Line , 2018, IEEE Transactions on Antennas and Propagation.

[16]  A. Suntives,et al.  A Fixed-Frequency Beam-Steerable Half-Mode Substrate Integrated Waveguide Leaky-Wave Antenna , 2012, IEEE Transactions on Antennas and Propagation.