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Volume 24
Issue 21
10.3390/s24216831
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Article

Directivity Improved Antenna with a Planar Dielectric Lens for Reducing the Physical Size of the On-Vehicle Communication System

by
Seongbu Seo
1,
Woogon Kim
1,
Hongsik Park
1,
Yejune Seo
2,
Dohyun Park
3,
Hyoungjong Kim
3,
Kwonhee Lee
3,
Hosub Lee
3 and
Sungtek Kahng
2,*
1
Department of Information & Telecommunication Engineering, Incheon National University, Incheon 22012, Republic of Korea
2
NS-Satellite RTDC ITR Center, Incheon National University, Incheon 22012, Republic of Korea
3
LIGNEX1, Bundang-gu, Seongnam-si 13488, Republic of Korea
*
Author to whom correspondence should be addressed.
Sensors 2024, 24(21), 6831; https://doi.org/10.3390/s24216831
Submission received: 23 August 2024 / Revised: 9 October 2024 / Accepted: 21 October 2024 / Published: 24 October 2024
(This article belongs to the Special Issue Microwave and Millimeter-Wave Antennas Design for Sensing Applications)
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Abstract

As the physical size of a communication system for satellites or unmanned aerial vehicles demands to be reduced, a compact antenna with high directivity is proposed as a core element essential to the wireless device. Instead of using a horn or an array antenna, a unit planar antenna is combined with a surface-modulated lens to convert a low antenna gain to a high antenna gain. The lens is not a metal-patterned PCB but is dielectric, which is neither curved nor very wide. This palm-sized lens comprises pixels with different heights from the backside of PolyPhenylene Sulfide (PPS) as the dielectric base. The antenna gain from the unit antenna of 4.5 cm × 4.5 cm is enhanced by 10 dB with the help of a compact dielectric lens of 7.5 cm × 7.5 cm at 24.5 GHz as the frequency of interest. The antenna design is verified by far-field measurement as well as near-field observation, including sensing a metal object behind a blocking wall by using an RF test bench. Moreover, antenna performance is understood by making a comparison with conventional designs of antennas in terms of directivity and physical sizes.
Keywords: array antenna; satellite; signal strength; radio sensor; metamaterial surface; transmission and reflection array antenna; satellite; signal strength; radio sensor; metamaterial surface; transmission and reflection

Share and Cite

MDPI and ACS Style

Seo, S.; Kim, W.; Park, H.; Seo, Y.; Park, D.; Kim, H.; Lee, K.; Lee, H.; Kahng, S. Directivity Improved Antenna with a Planar Dielectric Lens for Reducing the Physical Size of the On-Vehicle Communication System. Sensors 2024, 24, 6831. https://doi.org/10.3390/s24216831

AMA Style

Seo S, Kim W, Park H, Seo Y, Park D, Kim H, Lee K, Lee H, Kahng S. Directivity Improved Antenna with a Planar Dielectric Lens for Reducing the Physical Size of the On-Vehicle Communication System. Sensors. 2024; 24(21):6831. https://doi.org/10.3390/s24216831

Chicago/Turabian Style

Seo, Seongbu, Woogon Kim, Hongsik Park, Yejune Seo, Dohyun Park, Hyoungjong Kim, Kwonhee Lee, Hosub Lee, and Sungtek Kahng. 2024. "Directivity Improved Antenna with a Planar Dielectric Lens for Reducing the Physical Size of the On-Vehicle Communication System" Sensors 24, no. 21: 6831. https://doi.org/10.3390/s24216831

APA Style

Seo, S., Kim, W., Park, H., Seo, Y., Park, D., Kim, H., Lee, K., Lee, H., & Kahng, S. (2024). Directivity Improved Antenna with a Planar Dielectric Lens for Reducing the Physical Size of the On-Vehicle Communication System. Sensors, 24(21), 6831. https://doi.org/10.3390/s24216831

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