A Miniaturized Ultra-Wideband Radar for UAV Remote Sensing Applications

Abushakra, Feras; Jeong, Nathan; Elluru, Deepak; Awasthi, Abhishek; Kolpuke, Shriniwas; Luong, Tuan; Reyhanigalangashi, Omid; Taylor, Drew; Gogineni, Prasad

doi:10.1109/lmwc.2021.3129153

Cited by 23 publications

(8 citation statements)

References 21 publications

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“…The average wind speed during the flight was 5-7 m/s. More details on the radar system are mentioned in [53]. The antenna showed exceptional performance with the different radar bands and weather conditions.…”

Section: Cva Test With Suas Radarsmentioning

confidence: 99%

Ultra-Wideband Coplanar Vivaldi Antenna Array With Dielectric Patch Antenna for Grating Lobes Suppression

et al. 2022

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This paper details a new approach for enhancing the radiation characteristics of a coplanar Vivaldi antenna (CVA) array. First, the inter-element mutual coupling is reduced by introducing slots in the conventional CVA array. Then, a low-profile dielectric patch antenna (DPA) is situated between the CVA flares when it acts as a travelling wave radiator at the higher frequency band. The DPA is excited by the loop current at the radiation part of the CVA and a set of TE modes with omnidirectional radiation patterns are excited. This combination enhances the directivity in the broadside direction of the CVA by suppressing the grating lobes by as much as 10 dB. The 4×1 linear array covers the frequency range of 2.77-13.6 GHz, with 132% fractional bandwidth. Then, four of the proposed linear arrays are connected to constitute an 8×2 planar array to achieve a gain of 15.2-24.6 dBi. The proposed arrays are fabricated, tested and mounted on a small (Unmanned Aerial System) sUAS for radar measurements. The real-life field radar results with the proposed arrays are presented in this paper including the echogram of the scanned area.INDEX TERMS-High gain antennas, radar applications, radiation pattern enhancement.

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Section: Cva Test With Suas Radarsmentioning

confidence: 99%

Ultra-Wideband Coplanar Vivaldi Antenna Array With Dielectric Patch Antenna for Grating Lobes Suppression

et al. 2022

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“…UAV dengan ukuran kecil biasanya memiliki ukuran sayap 1-2 meter dengan berat sebesar 5 kilogram untuk itu pesawat ini memerlukan antena dengan dimensi antena yang lebih kecil dan berat yang lebih ringan untuk menunjang proses kerja dari UAV itu sendiri, untuk itu dibutuhkan suatu antena yang sederhana untuk menunjang proses kerja dari UAV tersebut. UAV biasanya digunakan untuk mengamati di area pertanian yang luas seperti kesehatan tanaman [2], dan juga mengamati dampak apabila terjadi bencana alam.…”

Section: Pendahuluanunclassified

Antena Mikrostrip Rectangular dengan Slot X Untuk Komunikasi Pada UAV

Arfin

Nursal²,

Yulindon³

2022

JTITS

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Abstrak-Unmaned Aerial Vehicle (UAV) sering kali digunakan untuk melakukan misi pengintaian maupun pemantauan pada daerah yang sulit dijangkau oleh manusia sehingga dibutuhkan suatu antena dengan bentuk yang sederhana dan bobot yang ringan seperti antena mikrostrip, banyak penelitian sebelumnya merancang antena mikrostrip untuk UAV tetapi memiliki pola radiasi omnidirectional yang membuat sinyal dikirimkan ke segala arah yang mengakibatkan ground station tidak menerima sinyal seutuhnya. Paper ini menjelaskan mengenai antena mikrostrip yang di aplikasikan pada komunikasi UAV menggunakan frekuensi 2,4 GHz dengan dimensi 47,96 mm x 40 mm. Antena ini dirancang menggunakan aplikasi CST Studio Suite 2021. Antena mikrostrip yang dirancang menggunakan patch rectangular dengan penambahan suatu slot yang berbentuk X pada bagian tengah patch yang ditujukan untuk memperbaiki nilai bandwidth dan pola radiasi pada antena. Hasil pada proses simulasi dengan frekuensi kerja 2,4 GHz didapatkan nilai return loss sebesar -21,937 dB, nilai VSWR yang didapatkan sebesar 1,1739, nilai gain yang didapatkan sebesar 2,36 dBi dan pola radiasi berbentuk unidirectional sedangkan hasil fabrikasi didapatkan nilai return loss sebesar -16,00 dB, dan nilai VSWR yang dihasilkan sebesar 1,369. Penelitian selanjutnya diharapkan dapat meningkatkan nilai bandwidth dengan menggunakan antena array.

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“…Military and commercial applications continue to drive antennas to service broader frequency bands with requirements of multiple beams and/or fast beam steering which necessitates the use of phased antenna arrays (PAAs) with true time delay systems [1][2][3][4][5][6]. True time delay systems require the use of time delay units (TDUs) to control the phase excitation of each element and have stability over frequency [7].…”

Section: Introductionmentioning

confidence: 99%

Ultra-Wideband Phased Antenna Array Time Delay Unit Architecture Optimization in Presence of Component Non-Idealities

Ramirez,

Johnson,

Mumcu

2024

IEEE Open J. Antennas Propag.

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Recently reported time delay unit architecture (TDU-A) optimization method based on integer linear programming is investigated for the first time, for practical implementation of ultra-wideband (UWB) phased antenna arrays (PAAs). Specifically, the method is considered for linear UWB PAAs and their feed networks which include non-idealities when practical implementations of their circuit components are pursued. These non-idealities are shown to cause additional time delay errors that were unaccounted for in prior work. The errors are induced by frequency dependent variations in power divider isolation and load mismatch, component VSWRs, and dispersion. Proper modeling of these errors in the TDU-A optimization leads to a TDU-A that has the necessary delay range required to steer the beam towards the desired wide scan angles. For experimental verification, a 16 element linear PAA TDU-A is optimized for operating from 5-30 GHz by modeling the non-idealities of the feed network that is implemented to steer the beams towards boresight, 25°, and 50°. Simulation and measured performances demonstrate the UWB operation with stable radiation patterns.INDEX TERMS Phased antenna array, true-time delay, integer programming, broadband, ultra-wideband

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A Miniaturized Ultra-Wideband Radar for UAV Remote Sensing Applications

Cited by 23 publications

References 21 publications

Ultra-Wideband Coplanar Vivaldi Antenna Array With Dielectric Patch Antenna for Grating Lobes Suppression

Ultra-Wideband Coplanar Vivaldi Antenna Array With Dielectric Patch Antenna for Grating Lobes Suppression

Antena Mikrostrip Rectangular dengan Slot X Untuk Komunikasi Pada UAV

Ultra-Wideband Phased Antenna Array Time Delay Unit Architecture Optimization in Presence of Component Non-Idealities

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