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- 摘要
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[IEEE 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Chengdu, China (2018.5.7-2018.5.11)] 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - A Novel Slotted Cavity-Backed Patch Antenna for Dual-Band UHF Applications
摘要： A novel slotted cavity–backed patch antenna with defected ground structure (DGS) is proposed in this paper. This slotted cavity–backed antenna is composed of a square patch with a metal square-loop as radiator, a cross-shaped slotted square patch as defected ground structure (DGS) and a metal backed-cavity. Both of the square patch and metal square-loop have four square slots. Simulated results shows that the impedance bandwidth with a return loss better than 10dB is 6MHz at 420MHz and the impedance bandwidth is 10MHz at 480MHz. The antenna exhibits stable radiation pattern over the operation frequency band. The profile and size of the proposed RHCP antenna are 1.0mm (0.001λ0) and 77mm×77mm (0.12λ0×0.12λ0), both of which are extremely small.
关键词： UHF antenna,low profile,miniaturization,slotted cavity–backed antenna,circular polarized
更新于2025-09-23 15:23:52
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[IEEE 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Chengdu, China (2018.5.7-2018.5.11)] 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - A Compact Circularly Polarized Implantable Antenna for Wireless Medical Telemetry
摘要： A novel miniaturized circularly polarized (CP) patch antenna operating at 915MHz ISM band is designed in this work for wireless biomedical communication. By taking advantage of loading stubs, the proposed antenna features a good miniaturization with the compact size of 13.88×13.88×1.27mm3. A pair of truncated corners in diagonal directions of the planar patch are used for the generation of circular polarization. The simulated 3-dB axial-ratio(AR) bandwidths of around 16MHz is achieved for the proposed antenna, while the impedance bandwidth is 47MHz for |S11| less than -10 dB.
关键词： miniaturization,Circularly polarized (CP),implantable antenna
更新于2025-09-23 15:23:52
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A Novel Miniaturized Planar Ultra-Wideband Antenna
摘要： A novel miniaturized planar ultra-wideband antenna is proposed. The antenna design comprises an electromagnetically coupled structure and a tapered radiating slot, while a triangular slot is etched on the ground plane. The antenna miniaturization is realized by adopting an electromagnetically coupled structure formed by the notched half-ellipse patch and the strip attached to the ground. The proposed antenna can yield a large 10-dB impedance bandwidth ranging from 1.5 to 10.4 GHz with satisfactory radiation properties. It also features a physical size of 37.4 mm × 64 mm, equivalent to a compact electrical size of 0.19λ × 0.32λ at 1.5 GHz. The important design parameters are analyzed to comprehend the operating principle of the antenna. A good agreement between the simulated and measured results is achieved.
关键词： compact antenna,Ultra-wideband antenna,planar antenna,antenna miniaturization
更新于2025-09-23 15:23:52
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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Compact L/S-Band Circularly Polarized Microstrip Antenna over Reactive Impedance Surface
摘要： A compact LIS-band circularly polarized (CP) antenna over the reactive impedance surface (RIS) is designed, fabricated, and measured. This dual-band CP antenna is excited by two probes and fed by two grounded coplanar waveguides. The CP radiation with very compact antenna size is achieved by stacking a square ring slotted truncated corner square patch and a truncated corner square patch over the RIS. The measured results show that the 3-dB axial ratio bandwidth of the antenna is 0.9% (1.787-1.803 GHz) for the lower band and 1.1% (2.685-2.715 GHz) for the upper band, while the 10-dB return loss bandwidth is 5.9% (1.746-1.852 GHz) and 7.3% (2.586-2.784 GHz), respectively. The antenna gain at boresight is 1.9 dBic for the lower band, and 1.94 dBic for the upper band. The overall volume of the dual-band CP antenna is 0.235 x 0.235 x 0.042λ at 1.765 GHz.
关键词： reactive impedance surface,circularly polarized antenna,size miniaturization,dual band
更新于2025-09-23 15:22:29
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[Lecture Notes in Electrical Engineering] Microelectronics, Electromagnetics and Telecommunications Volume 521 (Proceedings of the Fourth ICMEET 2018) || A Novel and Efficient Design for Squaring Units by Quantum-Dot Cellular Automata
摘要： Quantum cell automata (QCA) are the best possible alternative to the conventional CMOS technology due to its low power consumption, less area and high-speed operation. This paper describes synthesizable QCA implementation of squaring. Vedic sutras used for squaring are defined over algorithm construction. Based on the concept of the Vedic sutra, this paper has carried out 2-bit square and 4-bit square, projective to affine logic gates construction. Importantly for miniaturization of devices, the QCA based square is the operation on which the area of circuits relies on. This means that significantly lower QCA parameters can be used in the square than in other competitive square circuits such as Wallace, Dadda, serial-parallel, and Baugh-Wooley.
关键词： Nanocomputing,Miniaturization,fast-speed operation,Q-dot,Squaring unit
更新于2025-09-23 15:21:21
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[Springer Theses] Electrical Properties of Indium Arsenide Nanowires and Their Field-Effect Transistors || Introduction
摘要： As the miniaturization and integration of solid-state electronic devices has continued to increase rapidly with the demands of high speed, low power consumption and high storage density, the conventional Si-based technology has lost their advantages on fabrication process. Therefore the technologies based on new materials gradually attract researchers’ attention. Among them, Indium Arsenide (InAs) nanowires (NWs) with high electron mobility is one of the most promising candidate. In this chapter, we introduce the advantages of InAs nanowire on electronic devices and the development status of InAs nanowire electronic devices. Also, the topic ideas and chapter arrangements of this thesis are presented.
关键词： solid-state,high electron mobility,electronic devices,InAs nanowires,miniaturization
更新于2025-09-23 15:21:21
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Laser polymerized photonic wire bonds approach 1a??Tbit/s data rates
摘要： Microelectronics has solved the challenge of packaging different functional elements with integrated chips (ICs) in modern computing and communication by wire bonding. Miniaturization was a trend guided by the requirements for faster, more portable and less expensive (smaller amount of materials) solutions, where wire bonding evolved to accommodate increasingly more complex 3D architectures of chips and printed circuit boards. Even faster and more robust computing and communication can be provided by using photons rather than electrons. This was one of the underlying reasons for the fast growth of optical fiber communication, which is especially efficient over large ~1000 km distances. Data transfer in microelectronics also increasingly benefits from optical interconnects, which, however, have scaling challenges at small IC dimensions. The overall trend of optical fibers prevailing over copper wire for long-distance data transfer follows the miniaturization trend, and now, a new capability has been demonstrated on the microscale. Photonic wire bonding solves the same problem as wire bonding in microelectronics, but for optical communication on the level of chip-to-chip interconnects. In a recent study, a new milestone for data transfer over a 75 km channel at a rate of ~0.8 Tbit/s was demonstrated for Si photonic transmitters co-packaged with 1.5 μm InGaAsP lasers using photonic wire bonding. Several breakthroughs were combined to achieve the record high speed of data transfer. Optical insertion losses of only 0.7 dB were demonstrated. In addition, the required photonic wire tapering for single mode fiber operation/filtering was seamlessly achieved by direct laser writing. Most importantly, photonic wire bonding solves the stringent requirements for optical alignment between components and opens the possibility for automated packaging solutions. Si photonic platforms based on well-established complementary metal-oxide-semiconductor technologies can now be combined with other light sources and nonlinear optical components based on other platforms using photonic wire bonding. This makes hybrid photonic chip modules possible. It can be seen as a manifestation of the evolving trend in modern technology where complexity develops along with miniaturization, which has been the guiding principle established in previous decades of microelectronics.
关键词： optical communication,direct laser writing,miniaturization,photonic wire bonding,optical interconnects
更新于2025-09-23 15:21:01
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MINIATURIZATION OF TRANS-DIRECTIONAL COUPLED LINE COUPLERS USING SERIES INDUCTORS
摘要： A miniaturized trans-directional (TRD) coupled line coupler comprises series inductors and capacitor loaded coupled lines is proposed in the paper. Series inductors are added to the periodically loaded coupled lines for further miniaturization of volume. A novel equivalent circuit is presented and theoretically analyzed. Test circuits for the miniaturized and conventional 3-dB TRD couplers were designed to operate at 1.6 GHz and fabricated using printed circuit board (PCB) technology. Samples have been measured, and comparisons in terms of volume, schematic simulation results and measurement results between the miniaturized and conventional 3-dB TRD couplers have been made to validate the proposed structure. Results show that the proposed miniaturized TRD coupler achieves a size reduction of 47.6% compared to the conventional TRD coupler with similar performances.
关键词： PCB technology,trans-directional coupler,miniaturization,series inductors,coupled lines
更新于2025-09-23 15:19:57
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A single light spot GC detector employing localized surface plasmon resonance of porous Au@SiO <sub/>2</sub> nanoparticle multilayer
摘要： This paper describes the synthesis of a nano-porous multilayered film consisting of Au@SiO2 nanoparticles. This film was used to miniaturize the size of a localized surface plasmon resonance (LSPR)-based capillary gas chromatograph (GC) detector. A layer-by-layer (LbL) approach with proper surface reaction sequences was used to create a multilayer structure that consisted of as many as five layers of Au@SiO2 nanoparticles. The center wavelength of LSPR was shifted from 520 to 634 nm due to the approximation of additional layers of nanoparticles. The vapor response time for this Au@SiO2 multilayer LSPR sensor was identical to that of an Au nanoparticle monolayer, which confirmed that this multilayer structure has a high level of gas permeability. The multilayer was synthesized inside a glass capillary for use as a GC detector. Due to the enhancement of absorbance, the gas chromatographic signal was obtained via a single spotlight that penetrated one side of the glass capillary and was then reflected by a silver mirror coated on the opposite side. The detection limits were ≤20 ng for cyclohexanone and m-xylene.
关键词： gas chromatography,localized surface plasmon resonance,multilayer film,miniaturization,Au@SiO2 nanoparticles,VOC detection
更新于2025-09-19 17:15:36
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A novel miniaturized frequency selective surface
摘要： A novel single layer miniaturized frequency selective surface made of circular unit cell elements is presented in this article. The frequency selective surface (FSS) unit cell measures 0.055λ0 × 0.055λ0, where λ0 corresponds to its free space wavelength. The proposed FSS offers band stop characteristics with bandwidth of 137.5 MHz centered at 1.39 GHz. The symmetrical structure of the unit cell elements provides polarization independency. The miniaturized unit cell elements help achieving angular independency for both TE and TM mode of polarization. The miniaturized design provides excellent angular independency with negligible frequency shift for varying incident angles. A prototype of the FSS is fabricated and its simulation results are validated using measurements.
关键词： polarization,frequency selective surfaces (FSS),miniaturization
更新于2025-09-19 17:15:36