T-shaped ultra-wideband transparent antenna based on coplanar waveguide feed and design method thereof

By combining a T-shaped composite radiating patch with a symmetrical L-shaped ground plane window, the bandwidth limitation problem of transparent antennas in the high-frequency band is solved, achieving stable operation and high transparency of ultra-wideband communication, which is suitable for applications such as smart glass windows.

CN121709931APending Publication Date: 2026-03-20SOUTHWEST JIAOTONG UNIV
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Patent Information

Application Number
CN202610089502.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-22
Publication Date
2026-03-20

AI Technical Summary

Technical Problem

Existing transparent antennas struggle to achieve a wide and flat impedance matching bandwidth at high frequencies. Traditional structural improvement methods offer limited gains, and the coupling and matching between different resonant modes are difficult to control, resulting in dips or discontinuous bandwidth in the S11 curve, making it difficult to meet the requirements of ultra-wideband communication.

Method used

By employing a collaborative design of a T-shaped composite radiating patch and a symmetrical L-shaped ground plane window, and through a coplanar waveguide feeding structure, multiple resonant modes are excited and fused to form an ultra-wideband impedance matching characteristic of 4.72GHz-7.44GHz.

Benefits of technology

It achieves stable and efficient ultrawideband operation in the 4.7GHz to 7.45GHz frequency band, with high transparency, making it suitable for applications such as smart glass windows. It also has good process compatibility and clear and adjustable performance enhancement.

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Abstract

The invention discloses a coplanar waveguide feed-based T-shaped ultra-wideband transparent antenna and a design method thereof, and belongs to the technical field of ultra-wideband transparent antennae, the coplanar waveguide feed-based T-shaped ultra-wideband transparent antenna comprises a transparent dielectric substrate, and a coplanar waveguide feed structure, a radiation unit and a grounding plate structure are integrated on the same surface of the transparent dielectric substrate; the radiation unit is a T-shaped composite radiation patch; the grounding plate structure comprises two L-shaped windows, and the L-shaped windows are formed in the large-area grounding plane; and the two L-shaped windows are symmetrically distributed about the central longitudinal axis of the antenna and form partial projection overlapping with the T-shaped composite radiation patch. Through the collaborative design of the specific T-shaped composite radiation patch and the symmetrical L-shaped window, a plurality of resonant modes are effectively excited and deeply fused, so that the bandwidth limitation of the transparent antenna is overcome, and a key component is provided for a transparent integrated communication terminal; the whole structure is compact, the transparency is high, and stable and efficient ultra-wideband work can be achieved within the frequency band ranging from 4.7 GHz to 7.45 GHz.
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