Reconfigurable Terahertz Leaky-Wave Antenna Using Graphene-Based High-Impedance Surface

Wang, Xu-Chen; Zhao, Wen‐Sheng; Hu, Jun; Wang, Yin

doi:10.1109/tnano.2014.2365205

Cited by 127 publications

(71 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…VI. Furthermore, the compatibility of LWAs with active sources 137,138 and electronically reconfigurable materials 139,140 is promising for integrated terahertz systems. One salient feature of LWAs is that the output beam direction is dependent upon frequency.…”

Section: Leaky-wave Antennasmentioning

confidence: 99%

Tutorial: Terahertz beamforming, from concepts to realizations

et al. 2018

View full text Add to dashboard Cite

The terahertz range possesses significant untapped potential for applications including high-volume wireless communications, noninvasive medical imaging, sensing, and safe security screening. However, due to the unique characteristics and constraints of terahertz waves, the vast majority of these applications are entirely dependent upon the availability of beam control techniques. Thus, the development of advanced terahertz-range beam control techniques yields a range of useful and unparalleled applications. This article provides an overview and tutorial on terahertz beam control. The underlying principles of wavefront engineering include array antenna theory and diffraction optics, which are drawn from the neighboring microwave and optical regimes, respectively. As both principles are applicable across the electromagnetic spectrum, they are reconciled in this overview. This provides a useful foundation for investigations into beam control in the terahertz range, which lies between microwaves and infrared light. Thereafter, noteworthy experimental demonstrations of beam control in the terahertz range are discussed, and these include geometric optics, phased array devices, leaky-wave antennas, reflectarrays, and transmitarrays. These techniques are compared and contrasted for their suitability in applications of terahertz waves.

show abstract

Section: Leaky-wave Antennasmentioning

confidence: 99%

Tutorial: Terahertz beamforming, from concepts to realizations

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Publikasi [52] mengusulkan suatu konsep antenna leaky-wave dua dimensi dengan bahan graphene. Antena ini bisa di-tune di frequency dan melakukan beamforming (mengarahkan main beam ke arah tertentu) pada band interval terahertz.…”

Section: Methodsunclassified

“…Gambar 13 Permukaan High-impedance berbasiskan graphene dan model rangkainannya [52] Gambar 13 menunjukkan struktur geometri dari permukaan high-impedance (HIS) yang dirancang. Dengan memvariasikan tegangan VDC, nilai Rgr dan Lgr bisa diubah, sehingga bisa mengubah fasa dan besar dari faktor refleksi antenna yang dirancang di atas.…”

Section: Methodsunclassified

See 1 more Smart Citation

Riset Antena – State of the Art

Alaydrus¹

2017

InComTech

View full text Add to dashboard Cite

AbstrakRiset antenna telah mengalami perjalanan panjang, seiring dengan perkembangan teknologi wireless dan aplikasi sensor serta radar. Secara garis besar, jenis antenna bisa dikategorikan menjadi antenna kawat (dipole, yagi), antenna waveguide (aperture, horn, slot), antenna reflector dan antenna mikrostrip. Dalam perancangan antenna para insiyur selalu merujuk pada katalog antenna yang telah ada dan melakukan modifikasi (menambahkan atau mengurangi sesuatu, atau memvariasikan parameter) untuk memenuhi spesifikasi yang diminta. Tulisan ini memberikan ulasan riset terkini antenna, dengan lebih menekankan pada lima bidang: metoda komputasi elektromagnetika, modifikasi antenna, material penyusun, aplikasi yang baru dan pengukuran antenna. Sampai dengan awal 2015 ditemukan sangat banyak riset tentang antenna di pelbagai publikasi yang ada. PENDAHULUANTuntutan akan sistim telekomunikasi yang handal dan bisa digunakan di mana dan kapan saja, telah mendorong perkembangan teknologi telekomunikasi nirkabel (wireless) secara masif [1]. Sistim komunikasi seluler, yang merupakan salah satu teknologi terpenting saat ini telah berkembang sampai ke generasi keempat (4G/Long Term Evolution LTE) yang sampai menawarkan 36 pita frekuensi berbeda [2,3], untuk memperbesar kapasitas sistim. Sistim LTE dan LTE-Advanced menjadi suatu aplikasi yang sangat memanfaatkan kondisi interval frekuensi yang banyak (Multiband). Dalam perkembangannya LTE dan LTE-A menawarkan sistim Multiple Input Multiple Output (MIMO), yang mampu memanfaatkan fenomena jalur banyak (Multipath) sehingga dengan suatu kondisi yang mendukung, bisa memperbesar kecepatan transmisi data (data rate) secara signifikan [4,5,6].Jalur nirkabel (wireless channel) yang harus dilewatkan oleh gelombang elektromagnetika untuk sampai ke penerima merupakan media transmisi yang diluar kendali para perancang. Berbasiskan pada pengetahuan tentang sifat dari

show abstract

“…Fortunately, graphene can be introduced as the "switch" for terahertz-frequency devices because of its active complex conductivity. Some antennas take advantage of the graphene by making the frequency or the radiation pattern reconfigurable [17][18][19][20][21][22][23] such as the MIMO antennas, 17 leaky-wave antennas, 18,19 Yagi antennas, 20 microstrip quasi-Yagi antennas, 21 reflect-array antennas, 22 slot antennas, 23 and dipole antennas. 24,25 The antennas proposed in Refs.…”

Section: Introductionmentioning

confidence: 99%

Graphene-based Yagi-Uda antenna with reconfigurable radiation patterns

Jiao

et al. 2016

AIP Advances

View full text Add to dashboard Cite

This paper presents a radiation pattern reconfigurable Yagi-Uda antenna based on graphene operating at terahertz frequencies. The antenna can be reconfigured to change the main beam pattern into two or four different radiation directions. The proposed antenna consists of a driven dipole radiation conductor, parasitic strips and embedded graphene. The hybrid graphene-metal implementation enables the antenna to have dynamic surface conductivity, which can be tuned by changing the chemical potentials. Therefore, the main beam direction, the resonance frequency, and the front-to-back ratio of the proposed antenna can be controlled by tuning the chemical potentials of the graphene embedded in different positions. The proposed two-beam reconfigurable Yagi-Uda antenna can achieve excellent unidirectional symmetrical radiation pattern with the front-to-back ratio of 11.9 dB and the10-dB impedance bandwidth of 15%. The different radiation directivity of the two-beam reconfigurable antenna can be achieved by controlling the chemical potentials of the graphene embedded in the parasitic stubs. The achievable peak gain of the proposed two-beam reconfigurable antenna is about 7.8 dB. Furthermore, we propose a four-beam reconfigurable Yagi-Uda antenna, which has stable reflection-coefficient performance although four main beams in reconfigurable cases point to four totally different directions. The corresponding peak gain, front-to-back ratio, and 10-dB impedance bandwidth of the four-beam reconfigurable antenna are about 6.4 dB, 12 dB, and 10%, respectively. Therefore, this novel design method of reconfigurable antennas is extremely promising for beam-scanning in terahertz and mid-infrared plasmonic devices and systems.

show abstract

Reconfigurable Terahertz Leaky-Wave Antenna Using Graphene-Based High-Impedance Surface

Cited by 127 publications

References 32 publications

Tutorial: Terahertz beamforming, from concepts to realizations

Tutorial: Terahertz beamforming, from concepts to realizations

Riset Antena – State of the Art

Graphene-based Yagi-Uda antenna with reconfigurable radiation patterns

Contact Info

Product

Resources

About