An ultrawideband tapered slot wire composite antenna for electromagnetic compatibility testing

By designing an ultra-wideband tapered slot wire composite antenna, combining a slot wire radiator and an open loop radiator, and using an impedance network to adjust the current distribution, the problems of degradation of end-fire characteristics in the low-frequency band and decrease in radiation efficiency in the mid-to-high frequency band of miniaturized tapered slot wire antennas were solved, achieving stable radiation across the entire frequency band and high-efficiency electromagnetic compatibility testing.

CN122370714APending Publication Date: 2026-07-10SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHEAST UNIV
Filing Date
2026-06-09
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In the existing technology, miniaturized tapered slot antennas suffer from degraded end-fire characteristics and strong back-radiation in the low-frequency band, leading to multipath reflection and signal interference in electromagnetic compatibility testing. Furthermore, the traditional resistor loading method results in a decrease in radiation efficiency in the mid-to-high frequency band.

Method used

An ultrawideband tapered slot line composite antenna is designed. By combining a slot line radiator and an open loop radiator, the current distribution is adjusted using edge and center impedance networks to suppress back radiation and optimize the front-to-back ratio. A stepped impedance loading configuration is adopted to enhance low-frequency performance and maintain high radiation efficiency in the mid-to-high frequency bands.

Benefits of technology

It achieves stable end-fire characteristics and high radiation efficiency with full-band coverage, suppresses back radiation, improves the measurement accuracy and efficiency of electromagnetic compatibility testing, and has extremely high polarization purity to prevent polarization contamination.

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Abstract

This invention relates to an ultra-wideband tapered slot-line composite antenna for electromagnetic compatibility (EMC) testing. It includes a slot-line radiator, a coaxial connector, and an open-loop radiator, as well as edge impedance networks and a center impedance network located within the open-loop radiator. By changing the perimeter and conduction band width of the open-loop radiator, the loading positions and impedance values ​​of the edge and center impedance networks, and the lengths of the reverse and rear radiating arms, the antenna's impedance bandwidth and front-to-back ratio can be adjusted. This ultra-wideband antenna effectively reduces the antenna's electrical size and achieves an ultra-wide operating bandwidth. It maintains excellent unidirectional end-fire radiation characteristics and extremely high cross-polarization purity throughout the entire ultra-wideband operating frequency band, providing a high-performance and robust solution for EMC testing of ultra-wideband systems.
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