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A Wide Frequency Scanning Printed Bruce Array Antenna with Bowtie and Semi-Circular Elements.

Zeeshan Ahmed^1,2, Patrick McEvoy¹, Max J Ammann^1,2

¹Antenna and High-Frequency Research Centre, Technological University Dublin, Dublin D08 NF82, Ireland.

Sensors (Basel, Switzerland)

|December 2, 2020

Summary

This study introduces a printed frequency scanning antenna with a wide bandwidth (22-38 GHz) and seamless scanning from backward to forward endfire. The compact antenna achieves a peak gain of 15.30 dBi and scans from -64° to 76°.

Keywords:

frequency scanning antenna leaky-wave antenna meander line antenna millimeter-wave antenna periodic structure

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Area of Science:

Antenna Engineering
Electromagnetics
Microwave Technology

Background:

Presents a printed edge-fed antenna, a counterpart to wire Bruce array antennas, designed for frequency scanning applications.
The antenna unit-cell incorporates bowtie and semi-circular elements for broadband performance.

Discussion:

Achieves wide bandwidth from below 22 GHz to above 38 GHz.
Features open-stopband suppression for seamless scanning from backward, through broadside, to forward endfire.
Maintains a sidelobe level below -10 dB for efficient scanning.

Key Insights:

The proposed antenna offers a peak realized gain of 15.30 dBi.
Demonstrates a wide scanning range from -64° to 76°.
Its compact size is advantageous for integration into various systems.

Outlook:

Potential applications in radar, communication systems, and electronic warfare.
Further research could explore miniaturization and integration with active components.
Investigating advanced unit-cell designs for even wider bandwidths and improved scanning capabilities.