Article
Physics, Multidisciplinary
Zixian Wu, Guanghua Shi, Yang Yu, Xiaozhu Wen, Cheng Guo, Anxue Zhang
Summary: This paper discusses the design, fabrication, and measurement techniques of low-loss slotted waveguides made using micro metal additive manufacturing. Straight waveguides in WR-3.4 and WR-2.2 bands were fabricated and tested, showing low insertion loss per unit length.
FRONTIERS IN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Yedi Zhou, Kaijun Song, Yong Fan
Summary: This letter presents a magic-T integrated with transition. The transition between rectangular waveguide and microstrip line meets Faraday's law, and the balance ports are realized by placing a pair of probes in reverse directions. The magic-T has an isolation of 30 dB between the sum port and the difference port, an isolation of 22 dB for the balance ports, an insertion loss (IL) of less than 0.6 dB, and operates at frequencies between 7.7 and 9.0 GHz. Implemented with multilayer boards only, the waveguide magic-T is more suitable for solid-state amplifiers and has potential for miniaturization of antenna array systems.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Optics
Christian De Vita, Fabio Toso, Natale Giovanni Pruiti, Charalambos Klitis, Giorgio Ferrari, Marc Sorel, Andrea Melloni, Francesco Morichetti
Summary: Visible-light integrated photonics is a promising technology for various applications. This Letter presents a semi-transparent power monitor integrated on Si3N4 waveguides, offering high sensitivity and fast response for monitoring and controlling visible-light Si3N4 photonic integrated circuits.
Article
Engineering, Electrical & Electronic
Da Yi, Pei-Rong Zhao, Ming-Chun Tang, Ren-Long Zhang, Xing-Chang Wei, Er-Ping Li
Summary: A microwave absorber is proposed to absorb waves below the cutoff frequency of a rectangular waveguide (RWG). The absorber utilizes a lossy capacitive metasurface to couple with and attenuate the waves below the cutoff frequency, effectively absorbing the evanescent waves (EWs). Three samples made of indium tin oxide (ITO) thin films were designed, fabricated, and tested, showing good agreement between experimental and theoretical results, with a maximum measured absorptance of 97%. Compared to conventional plane-wave absorbers, the proposed absorber has a distinct working mechanism, design principle, and application scenario, requiring only a single-layer conductor.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Qiannan Ren, Ashraf Uz Zaman, Jian Yang, Vessen Vassilev, Carlo Bencivenni
Summary: This article discusses three integration and packaging techniques for gap waveguides and monolithic microwave integrated circuits (MMICs) suitable for multilayer waveguide applications. It presents two vertical transitions between microstrips and ridge gap waveguides (RGWs), as well as the integration of MMIC with inverted microstrip gap waveguide (IMGW) using a compact packaging structure. The results show consistent operational characteristics and performance with passive measurements.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2022)
Article
Computer Science, Information Systems
Yuyu Zhao, Jun Dong, Fan Yin, Xinchun Fang, Ke Xiao
Summary: This article introduces a novel transition between coplanar waveguide (CPW) and air-filled rectangular waveguide (RWG), which broadens the bandwidth. The design does not require intermediate transition or air-bridges, and the planar circuit can be designed with high- and low-permittivity materials, offering more benefits in both PCB and MMIC design. Measurement results agree well with simulation results, validating the feasibility of this design.
Article
Instruments & Instrumentation
Senjie Jiang, Qingyuan Wang, Rongrong Su
Summary: A quadra-ridged waveguide transformer (QRWT) is proposed for full-band matching between standard and half-height waveguides, achieving compact components and better matching for wider bands. The QRWT has an optimized length of 3.088 mm, providing reflections below -24 dB in the 21.7 to 33 GHz operation bandwidth. Compared to a conventional quarter-wave transformer, the QRWT has a 57% shorter length and a simpler manufacturing method using wire-electrode cutting. Experimental results show reflections below -16.6 dB and insertion loss below 0.2 dB for the fabricated QRWT matching circuit.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Materials Science, Multidisciplinary
S. Sudha Maria Lis, K. Rajasimha, Kapil Debnath, V. Krishna Chaitanya, B. N. Shivakiran Bhaktha
Summary: In this study, the sol-gel fabrication and characterization of SiO2-TiO2 one-dimensional photonic crystal (1DPhC) waveguides embedded with a low-index defect layer are presented. Femtosecond laser micromachining was used for microfabrication on multilayer structures, and the waveguiding characteristics of the fabricated structures were studied. The results show that the fabricated 1DPhC channel waveguides have efficient light guiding properties and are suitable for applications in optical integrated circuits.
Article
Metallurgy & Metallurgical Engineering
Zhang Ying-cong, Ge Jin-qun, Wang Guo-an
Summary: This paper discusses the needs and implementation methods of multi-function, multiband, cost-effective, miniaturized reconfigurable RF components in modern and future wireless communication systems. It focuses on the development of RF microelectromechanical systems and other tunable components using microfabrication techniques and advanced materials. The research on the application of ferroelectric and ferromagnetic materials to achieve continuous tunability, reduced size, and enhanced performance of RF components is also presented. Additionally, methods utilizing nano-patterning to improve the high frequency characteristics of ferromagnetic thin film and their applications in developing fully electrically tunable RF components are fully demonstrated.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Multidisciplinary Sciences
Yiding Lin, Zheng Yong, Xianshu Luo, Saeed Sharif Azadeh, Jared C. Mikkelsen, Ankita Sharma, Hong Chen, Jason C. C. Mak, Patrick Guo-Qiang Lo, Wesley D. Sacher, Joyce K. S. Poon
Summary: Visible and near-infrared spectrum photonic integrated circuits are important technologies for addressing scaling challenges in quantum information and biosensing. This study reports the integration of silicon nitride-on-silicon waveguide photodetectors in a visible light photonic platform, which achieved high external quantum efficiency, wide opto-electronic bandwidth, and high avalanche gain-bandwidth product.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
James Campion, Joachim Oberhammer
Summary: This article introduces precision silicon micromachined waveguide calibration standards for terahertz vector network analyzers, enabling highly repeatable and traceable standards. It demonstrates silicon as a promising material for precise metrology standards with potential for wide applications.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Engineering, Electrical & Electronic
Liyan Zhu, Sang-Hee Shin, Roshan Payapulli, Taiki Machii, Mizuki Motoyoshi, Noriharu Suematsu, Nick M. Ridler, Stepan Lucyszyn
Summary: This study demonstrates the successful hybrid integration of a complementary metal-oxide-semiconductor (CMOS) radio frequency integrated circuit (RFIC) into a 3-D printed metal-pipe rectangular waveguide (MPRWG). On-chip Vivaldi antennas are used for TE10-to-thin-film microstrip (TFMS) mode conversion. The packaging solution has a low insertion loss of only 1 dB/transition at 126 GHz, offering new opportunities for low-cost subterahertz (THz) multichip modules.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Multidisciplinary Sciences
Afshin Moradi
Summary: This study presents the quasi-electrostatic theory of wave propagation in a long rectangular waveguide filled with an anisotropic medium based on nanowire hyperbolic metamaterials. The results include field configurations, cutoff frequencies, group velocities, power flows, and storage energies supported by such structures.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Electrical & Electronic
Nahid Aslani-Amoli, Mutee ur Rehman, Lakshmi Narasimha Vijay Kumar, Arya Moradinia, Fuhan Liu, Madhavan Swaminathan, Cheng-Gang Zhuang, Rajesh Vaddi, Seong-Ho Seok, Cheolbok Kim
Summary: This letter reports the ultralow insertion loss of substrate-integrated waveguides (SIWs) in alumina ribbon ceramic (ARC) substrates for mm-wave packaging applications. The SIWs on ARC substrates show excellent performance in terms of insertion loss and are easier to fabricate compared to SIWs on other substrates.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Gautier Zinkiewicz, Alexis Chevalier, Paul Laurent, J. Benedicto, Azar Maalouf, Vincent Laur
Summary: A new compact microwave termination design is proposed using multi-materials 3-D-printing. The concept allows for controlling frequency and absorption performance through the combination of different materials. Experimental results demonstrate stable temperature behavior and lower power-handling capability compared to traditional terminations.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Jacob W. Kooi, D. J. Hayton, Paul F. Goldsmith, D. C. Lis, Jonathan H. Kawamura, Bruce Bumble, Henry George LeDuc, Imran Mehdi, Goutam Chattopadhyay
Summary: Researchers aim to detect and measure the extremely weak HDO, (H2O)-O-17, and (H2O)-O-18 in comets, using powerful receivers and sensitive instruments, in order to unravel the mysteries surrounding the origin of Earth's water.
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Maria Alonso-delPino, Sjoerd Bosma, Cecile Jung-Kubiak, Goutam Chattopadhyay, Nuria Llombart
Summary: This study proposes a hybrid electromechanical scanning lens antenna array architecture for steering highly directive beams at submillimeter wavelengths, combining electronic phase shifting of a sparse array with mechanical translation of a lens array. Additionally, a novel leaky wave lens feed concept is implemented for achieving wide bandwidth and large steering angles in the antenna system.
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Okan Yurduseven, Choonsup Lee, David Gonzalez-Ovejero, Mauro Ettorre, Ronan Sauleau, Goutam Chattopadhyay, Vincent Fusco, Nacer Chahat
Summary: The silicon-gallium arsenide semiconductor-based holographic metasurface antenna can operate at 94 GHz, using holographic approach to modulate guided-mode generated by a pillbox beamformer with three independent beams for beam steering. The antenna is planar and extremely low-profile, suitable for small platforms.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Deacon Nemchick, Hayk Hakopian, Brian Drouin, Adrian Tang, Maria Alonso-delPino, Goutam Chattopadhyay, Frank Chang
Summary: The performance of a CMOS transmitter designed for planetary science in situ molecular sensing applications, with an operational bandwidth of 180-190 GHz and peak output power of 0.6 mW, has been evaluated through spectroscopic-based experimental trials. The results demonstrate the suitability of the transmitter for high-precision molecular spectroscopy applications, showcasing the tuning finesse and phase-noise characteristics of the integrated circuit embedded phase lock loop. Additionally, the design and performance of a pulse modulator in the CMOS circuitry for sensitive emission-based Fourier transform detection schemes are described and characterized.
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Sofia Rahiminejad, Maria Alonso-delPino, Theodore J. Reck, Alejandro Peralta, Robert Lin, Cecile Jung-Kubiak, Goutam Chattopadhyay
Summary: This article introduces a low-loss silicon MEMS phase shifter operating in the 500-600 GHz band, capable of achieving different phase shifts by moving a silicon slab inside a waveguide. The phase shifter is fully actuated at 50 V, can achieve large displacement, and performs well in the desired frequency band.
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2021)
Editorial Material
Engineering, Electrical & Electronic
Okan Yurduseven, Mohsen Khalily, Symon Podilchak, Goutam Chattopadhyay, Nelson Fonseca
Summary: This special section brings together experts in the antenna field to showcase the latest research in Earth and planetary science instrumentation, with a particular emphasis on metasurface type of antennas. Pelletier et al. present a dual-polarized reflectarray antenna operating at Ku-band frequencies for synthesizing a synthetic aperture radar (SAR) for snow mass measurements.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Sjoerd Bosma, Nick van Rooijen, Maria Alonso-delPino, Nuria Llombart
Summary: A resonant leaky-wave lens antenna with a circular waveguide and annular corrugations in the ground plane is proposed. The leaky-wave feed effectively reduces the impact of the spurious TM0 leaky-wave mode and simplifies the assembly process. The antenna achieves high aperture efficiency, low return loss, and low cross-polarization level over a wide bandwidth of 110-220 GHz (2:1).
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Juan Bueno, Sjoerd Bosma, Tobias Buskamp-Alda, Maria Alonso-delPino, Nuria Llombart
Summary: This article presents the design, fabrication, and characterization of a broadband lossless matching layer for silicon lens arrays. The proposed matching layer, based on silicon frusta, covers more than an octave of bandwidth and outperforms the commonly-used parylene-C matching layer.
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Martijn Hoogelander, Sven van Berkel, Satoshi Malotaux, Maria Alonso-delPino, Marco Spirito, Andrea Neto, Daniele Cavallo, Nuria Llombart
Summary: This contribution presents the diffraction-limited imaging capabilities of a focal plane array (FPA) of antenna-coupled direct-detectors at submillimeter wavelengths. A quasi-optical setup was used to actively illuminate the FPA for imaging with high signal-to-noise ratio (> 40 dB SNR). The results demonstrate the attractiveness of this FPA design for future passive THz imaging applications.
2022 47TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ 2022)
(2022)
Article
Engineering, Electrical & Electronic
Sjoerd Bosma, Nick Van Rooijen, Maria Alonso-Delpino, Marco Spirito, Nuria Llombart
Summary: This study reports the first demonstration of dynamic beam steering using a scanning lens phased array. By combining mechanical and electrical phase shifting, the researchers successfully achieved dynamic beam steering using a sparse array. The prototype demonstration showed high aperture efficiency and low grating lobe levels.
IEEE JOURNAL OF MICROWAVES
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
M. Alonso-DelPino, S. Bosma, C. Jung-Kubiak, G. Chattopadhyay, N. Llombart
Summary: This paper presents a novel quasi-optical power distribution technique for efficient multi-pixel LO power distribution for submillimeter-wave instruments, achieving a power coupling efficiency of nearly 60%. A prototype based on a transmit array of 7 pixels at WR1.5 is demonstrated.
2021 46TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Sjoerd Bosma, Nick van Rooijen, Maria Alonso-delPino, Nuria Llombart
Summary: In this work, a plastic resonant leaky-wave lens antenna with high aperture efficiency (>80%) over a 1:2 bandwidth at 180 GHz is presented. This antenna is suitable for next-generation wireless and sensing applications requiring high-directivity steerable beams. The high aperture efficiency is achieved through annular corrugations in the ground plane combined with a leaky-wave resonant cavity, as demonstrated through measurements of a WR-5 prototype.
2021 46TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ)
(2021)
