A Low-Cost End-Fire Beam Steering Antenna Array Based on Varactor Diode

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Abstract
A low-cost end-fire beam steering antenna array based on varactor diode is proposed in this letter. This 1×4 end-fire dipole antenna array steerable beam features for linear polarizations. The array element adopts a dipole antenna with some metallized via can effectively suppress backward radiation and improve directionality of the dipole antenna array. To achieve continuous beam-scanning ability, reflection-type phase shifters are designed with varactor diodes and integrated with the dipole antenna. The simulated results demonstrate that the beam can be scanned continuously in a range between ±40°. Meanwhile, the activeVSWR is better than 1.5 from 5.725 to 5.85 GHz and the gain reduction is only about 1.8 dB at 5.8 GHz.
Funding Information
  • Research and Development

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