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oe1(光电查) - 科学论文

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出版时间
  • 2018
研究主题
  • Schottky diodes
  • frequency multipliers
  • submillimeter-wave technology
  • terahertz technology.
  • Submillimeter-wave sources
应用领域
  • Optoelectronic Information Science and Engineering
机构单位
  • California Institute of Technology
201 条数据
?? 中文（中国） ▾

  • A high‐isolation dual‐polarized quad‐patch antenna fed by stacked substrate integrated waveguides for millimeter‐wave application

    摘要： A high-isolation dual-polarized quad-patch antenna fed by stacked substrate integrated waveguide (SIW) that is suitable for millimeter-wave band is proposed in this paper. The antenna consists of a quad-patch radiator, a two-layer SIW feeding structure and two feeding ports for horizontal and vertical polarization. The two-layer stacked SIW feeding structure achieves the high isolation between the two feeding ports (|S21| ≤ ?45 dB). Based on the proposed element, a 1 × 4 antenna array with a simple series-fed network is also designed and investigated. A prototype working at the frequency band from 38 to 40 GHz is fabricated and tested. The results indicate that the proposed antenna has good radiation performance at 38 GHz that covers future 5G applications.

    关键词： millimeter-wave,high-isolation,series-fed,dual-polarized,substrate integrated waveguide

    更新于2025-09-16 10:30:52

  • [IEEE 2019 International Workshop on Fiber Optics in Access Networks (FOAN) - Sarajevo, Bosnia and Herzegovina (2019.9.2-2019.9.4)] 2019 International Workshop on Fiber Optics in Access Networks (FOAN) - 5th-Generation Mobile Access Networks Assisted by Integrated Microwave Photonics

    摘要： This paper addresses the needs of mobile access network and presents the benefits of integrated microwave photonics for 5th-generation (5G) mobile networks. Full convergence of the optical fiber and the wireless segments in the form of microwave photonics is described. The usage of integrated microwave photonics in optically supported wireless networks can provide a high-capacity mobile system based on the micro-wave and millimeter-wave frequency bands.

    关键词： millimeter wave,wireless networks,integrated microwave photonics,radio-over-fiber,cellular architecture,5th-Generation

    更新于2025-09-16 10:30:52

  • A SIMPLIFIED IMPLEMENTATION OF SUBSTRATE INTEGRATED NON-RADIATIVE DIELECTRIC WAVEGUIDE AT MILLIMETER-WAVE FREQUENCIES

    摘要： The substrate integrated non-radiative dielectric (SINRD) guide presents a rather complicated process of design and implementation because of multiple interrelated design parameters involved in the de?nition of structures. In this work, the size of SINRD guide is halved by using a perfect electrical conductor (PEC) image plane. Consequently, the number of modes in the resulting image SINRD (iSINRD) guide is equally reduced since all even modes including the LSE 10 mode are suppressed. Furthermore, a simple yet accurate design method is proposed that takes into account many parameters involved in the design of an SINRD guide, especially dimensions of perforation and dispersion e?ects.Three iSINRD prototypes are fabricated to test the proposed method over the W-band frequency range. Two of the prototypes are based on Alumina substrate with di?erent perforation pro?les, and both exhibit insertion loss around 1 dB while the return loss is around 16 dB. The third is based on RO6002 substrate and exhibits an insertion loss of around 3 dB and a return loss of around 14 dB. To test the leakage loss caused by periodic gaps in the PEC wall, two iSINRD lines with one and three gaps were fabricated. The insertion and return losses of the former case are respectively 1.2 dB and 17 dB compared to 2.5 dB and 18 dB of the latter case.

    关键词： return loss,insertion loss,W-band,image SINRD (iSINRD) guide,Alumina substrate,millimeter-wave frequencies,RO6002 substrate,Substrate Integrated Non-Radiative Dielectric (SINRD) guide

    更新于2025-09-16 10:30:52

  • [IEEE 2019 IEEE Conference on Antenna Measurements & Applications (CAMA) - Kuta, Bali, Indonesia (2019.10.23-2019.10.25)] 2019 IEEE Conference on Antenna Measurements & Applications (CAMA) - Substrate Integrated Waveguide Horn Antennas at Millimeter Waves

    摘要： Anticipating the potentials and the challenges of the millimeter wave regions, horn antennas in substrate integrated waveguide (SIW) are observed. The antennas are fed by an WR28 rectangular waveguide through a slotted transition to the SIW structure. A parameter study by variating the dimension of the rectangular slot was carried out to get optimal reflection characteristics. Afterwards, several geometry modifications, such as changing the opening of the horn, the flare length and adding some vias, are performed to study the characteristics of the antennas. The antennas have very good reflection characteristics at frequency 38 GHz and a simulated gain of around 7.5 dBi. Measurements with a vector network analyzer confirmed the results.

    关键词： substrate integrated waveguide,millimeter wave,horn antenna,WR28

    更新于2025-09-16 10:30:52

  • [IEEE 2019 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Guangzhou, China (2019.5.19-2019.5.22)] 2019 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Design of a high outband rejection cross-coupled SIW filter for millimeter wave communications

    摘要： In this paper, we demonstrate ultra-fast millimeter wave beam steering with settling times below 50 ps. A phased array antenna with two elements is employed to realize beam steering. The phased array feeder is implemented with a recently introduced time delay line that provides, at the same time, an ultra-fast tunability, broadband operation, and continuous tuning. Our implementation is used to perform symbol-by-symbol steering. In our demonstration, the beam direction is switched between two sequentially transmitted symbols toward two receivers placed 30° apart. We show the successful symbol-by-symbol steering for data streams as fast as 10 GBd. The suggested scheme shows that the ultra-fast beam steering is becoming practical and might ultimately enable novel high bit-rate multiple access schemes.

    关键词： Ultra-fast beam steering,radio access network,microwave photonics,millimeter wave communication

    更新于2025-09-16 10:30:52

  • [IEEE 2019 International Vacuum Electronics Conference (IVEC) - Busan, Korea (South) (2019.4.28-2019.5.1)] 2019 International Vacuum Electronics Conference (IVEC) - Design of a Q-band Circular Waveguide TE <sub/>01</sub> Mode Converter

    摘要： The primary goal of this paper is the optimization of data transmissions and connections between 5G base stations (BSs) as well as the improvement of access technologies and transmission methods in consideration of massive multi-input multi-output, a key technology in 5G networks. In order to reach an access technology supported by multiple BSs and small cells, we use 5G millimeter wave (mmWave), due to its high directivity and sensitivity to blockage, to enhance the connection system. In the simulation, we will consider extremely high-frequency band and small angle of mmWave, and arrange obstructions in the environment in view of high attenuation characteristics in mmWave signals. After a wave beam penetrates through a wall, the power of the wave sharply decreases. For reduction of energy consumption, the wave therefore will select an mmWave BS with poor signal quality but without blockage to transmit data. Because the number of macro-cells will affect the communication quality and the computational complexity, this paper especially focuses on three factors of a network: delay, capacity, and path loss, and purposes to figure out the most energy-efficient BS densities for 5G-based green communications.

    关键词： 5G,capacity,millimeter wave,path loss,delay

    更新于2025-09-16 10:30:52

  • Additively Manufactured Dielectric Waveguides for Advanced Concepts for Millimeter-Wave Interconnects

    摘要： Technology mega trends, such as autonomous driving, multiple-input multiple-output (MIMO), or multi-gigabit communication, drastically increase the demand for ultra-broadband millimeter-wave (mmW) transmission line technologies. A broadband and robust signal and data transmission between components and modules at low cost is a mandatory requirement to ensure high-performance functionality of advanced communication and radar systems. Dielectric waveguides (DWGs) are a highly suitable technology to meet these requirements due to their outstanding transmission capabilities for mmW signals coupled with their high flexibility, low weight, and low cost. Additive manufacturing (AM) processes based on dielectric materials open up new perspectives for fully automated wiring of mmW modules and systems, and they enable cost-efficient application-specific solutions. In this article, we propose novel printed DWG designs with optimized transmission performance. Measurement results of different DWG designs demonstrate the excellent functionality of the proposed transmission line and interconnection concepts. These results and the shown resiliency and practicality of the presented approaches illustrate attractive opportunities for new interconnect technologies based on new manufacturing processes.

    关键词： transmission line measurements,Dielectric materials,millimeter-wave (mmW) measurements,waveguides (WGs)

    更新于2025-09-16 10:30:52

  • [IEEE 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) - Tel-Aviv, Israel (2019.11.4-2019.11.6)] 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) - Transformer-Coupled Octa-Core 60 GHz Push-Push VCO in a 45-nm RF-SOI CMOS Technology

    摘要： This work presents a 60 GHz octa-core push-push VCO in a 45 nm partially depleted (PD) Silicon-on-Insulator (SOI) CMOS technology. We investigate the feasibility of coupling eight VCO cores via resonant-tank transformers and discuss circuit topology considerations. The measured phase noise at 63.4 GHz is (cid:2)95.3 dB/Hz at 1 MHz offset from carrier. The continuous frequency-tuning range is 19 %. The eight VCO cores consume in total 80 mW DC power. The complete circuit, including buffers at the fundamental and second harmonic outputs, draws 158 mA from a single 1 V supply. The total area of the octa-core VCO excluding pads is 0.18 mm2.

    关键词： silicon-on-insulator,wideband,millimeter-wave,VCO,CMOS technology,phase noise

    更新于2025-09-16 10:30:52

  • [IEEE 2019 IEEE 10th Control and System Graduate Research Colloquium (ICSGRC) - Shah Alam, Malaysia (2019.8.2-2019.8.3)] 2019 IEEE 10th Control and System Graduate Research Colloquium (ICSGRC) - Ultra-wideband (50 – 60 GHz) mm-Wave Substrate Integrated Waveguide (SIW) Antenna for 5G Applications

    摘要： In this paper, ultra-wide-band SIW antenna technology is presented. The proposed antenna applies for 50 - 60 GHz applications such as 5 G and feature WLAN. The proposed antennas designed with two different slot configurations including the shape of F - C slots and circular slot shape. The simulated results show that the designed antennas resonates in the entire 50 to 60 GHz bands, making this new antenna cover all applications within this range. The reflection coefficients in all ranges from 50 to 60 GHz are below 10 dB. The antenna achieves good efficiency and gain.

    关键词： SIW,UWB,5G,millimeter wave

    更新于2025-09-16 10:30:52

  • [IEEE 2019 16th China International Forum on Solid State Lighting & 2019 International Forum on Wide Bandgap Semiconductors China (SSLChina: IFWS) - Shenzhen, China (2019.11.25-2019.11.27)] 2019 16th China International Forum on Solid State Lighting & 2019 International Forum on Wide Bandgap Semiconductors China (SSLChina: IFWS) - High color rendering index white LEDs fabricated using InP/ZnS green-emitting quantum dots and InP/ZnSe/ZnS red-emitting quantum dots

    摘要： This paper presents a 3-D statistical channel impulse response (IR) model for urban line of sight (LOS) and non-LOS channels developed from 28- and 73-GHz ultrawideband propagation measurements in New York City, useful in the design of 5G wireless systems that will operate in both the ultra-high frequency/microwave and millimeter-wave (mmWave) spectrum to increase channel capacities. A 3GPP-like stochastic IR channel model is developed from measured power delay profiles, angle of departure, and angle of arrival power spectra. The extracted statistics are used to implement a channel model and simulator capable of generating 3-D mmWave temporal and spatial channel parameters for arbitrary mmWave carrier frequency, signal bandwidth, and antenna beamwidth. The model presented here faithfully reproduces realistic IRs of measured urban channels, supporting air interface design of mmWave transceivers, filters, and multi-element antenna arrays.

    关键词： 5G,28 GHz,3-D ray-tracing,multipath,time cluster (TC),spatial lobe (SL),millimeter-wave (mmWave) propagation,statistical simulator,spatial channel model (SCM),time cluster spatial lobe (TCSL),Channel model,impulse response (IR),73 GHz

    更新于2025-09-16 10:30:52