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Extending the scanning angle of a phased array antenna by using a null-space medium.

Fei Sun1, Sailing He1

  • 11] Centre for Optical and Electromagnetic Research, Zhejiang Provincial Key Laboratory for Sensing Technologies, JORCEP, East Building #5, Zijingang Campus, Zhejiang University, Hangzhou 310058, China [2] Department of Electromagnetic Engineering, School of Electrical Engineering, Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden.

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This study presents a novel radome design using null-space materials to significantly expand phased array antenna scanning angles. The innovative design achieves a linear relationship between incident and steered angles, enhancing antenna performance.

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Area of Science:

  • Electromagnetics and Antenna Engineering
  • Metamaterials and Nanophotonics

Background:

  • Phased array antennas (PAAs) are crucial for modern wireless communication and radar systems.
  • Extending the scanning angle of PAAs is a persistent challenge in antenna design.
  • Existing solutions often involve complex mechanical structures or limited electronic steering capabilities.

Purpose of the Study:

  • To design a novel radome capable of enhancing the scanning angle of phased array antennas.
  • To achieve a predetermined relationship, such as a linear one, between incident and steered angles.
  • To utilize null-space media for radome construction, simplifying fabrication and material requirements.

Main Methods:

  • Introduction of a columnar null-space region as a reference space for radome design.
  • Layer-by-layer construction of the radome using two homogeneous materials, termed null-space medium.
  • Approximation techniques applied to simplify the radome structure and material composition.

Main Results:

  • The proposed radome design successfully extends the scanning angle of phased array antennas.
  • A linear relationship between incident and steered angles was achieved, as demonstrated by numerical simulations.
  • The radome can be constructed using only two homogeneous materials, simplifying manufacturing.

Conclusions:

  • The developed null-space radome offers a promising solution for increasing the operational scanning range of phased array antennas.
  • The use of null-space media provides an efficient and simplified approach to radome fabrication.
  • This technology has potential applications in advanced antenna systems requiring wide-angle electronic beam steering.