- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2018 International Conference on Wireless Communications, Signal Processing and Networking (WiSPNET) - Chennai (2018.3.22-2018.3.24)] 2018 International Conference on Wireless Communications, Signal Processing and Networking (WiSPNET) - A Broadband Circularly Polarized Microstrip Patch Antenna for X-Band Applications
摘要： This paper presents a broadband circularly polarized microstrip patch antenna. The proposed antenna is designed using an octagonal patch, finite ground plane with L shaped slot and two L shaped strips placed orthogonal to each other. By utilising the strips, Broadband, Axial Ratio bandwidth (ARBW) is achieved. From simulated results, impedance bandwidth (?10 dB) is 5.8 GHz (9.8 GHz–15.6 GHz) and AR bandwidth (3 dB) of the antenna is 7.3 GHz (8.7 GHz–16 GHz). The antenna is proposed with a simple structure and broadband circularly polarized, which is used widely for X-Band applications.
关键词： Broadband,polarization,Axialratio BW(ARBW),Microstrip patch Antenna
更新于2025-09-23 15:22:29
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A Low-Profile and High-Gain CP Patch Antenna with Improved AR Bandwidth via Perturbed Ring Resonator
摘要： A low-profile circularly-polarized (CP) patch antenna with improved axial ratio (AR) bandwidth and high gain is proposed in this letter. The antenna consists of a pin-loaded patch and a probe-fed ring resonator beneath the patch radiator. On the one hand, the radiative patch dominates the radiation, and the loading of shorting pins facilitates its high gain due to enlarged radiating area at resonance. On the other hand, the ring resonator with perturbation produces two additional split degenerate modes, which not only widen the bandwidth of magnitude, but also generate the required quadrature phase shift for CP radiation. The working mechanism is presented with an equivalent circuit model, allowing us to easily demonstrate how the ring resonator and patch radiator work together to effectively widen AR bandwidth. With the proposed method, stable high gain of about 11 dBic has been realized over an AR bandwidth of 6% for a single-fed CP patch antenna with profile of 0.05λ0 at 2.33 GHz.
关键词： improved AR bandwidth,Stacked CP patch antenna,high gain,low profile,non-radiative resonator
更新于2025-09-23 15:22:29
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[IEEE 2018 7th International Conference on Computer and Communication Engineering (ICCCE) - Kuala Lumpur, Malaysia (2018.9.19-2018.9.20)] 2018 7th International Conference on Computer and Communication Engineering (ICCCE) - CPW-Fed Patch Antenna with Reflecting Metasurface Covering for WLAN and WiMAX Applications
摘要： A coplanar waveguide (CPW)-fed multiband patch antenna with the integration reflecting metasurface covering has been designed and performance characteristics are critically analyzed. The proposed low profile antenna can offers the wireless communications services for WLAN and WiMAX applications. The rectangular shaped patch antenna consists of pair of C-, L- and splitted-T shape slotted radiator, and 2D reflective metasurface covering at the back of patch which is separated by dielectric layer of substrate. The details of the antenna design structure and performance criteria are discussed through numerical simulation using full-wave electromagnetic simulator. The simulation results shows that by employing the reflecting metasurface covering, the -10dB impedance bandwidth has considerably increased than the typical CPW-fed patch antenna: from 440 MHz to 570 MHz (29%), 390 MHz to 480 MHz (23%) and 900 MHz to 1060 MHz (18%) for three different operating bands centered at 2.5, 3.5 and 5.5 GHz respectively. The simulated result shows the antenna with RMC integration achieves peak gain of 6.56 dBi, 6.43 dBi and 6.97 dBi with average gain of 6.45 dBi, 6.27 dBi and 6.82 dBi at three operating bands respectively which are higher than the typical patch antenna.
关键词： patch antenna,low-profile,reflecting metasurface covering,CPW-fed,WiMAX/WLAN Applications,radiation pattern improvement
更新于2025-09-23 15:21:21
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[IEEE 2019 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO) - Zhenjiang, China (2019.8.4-2019.8.8)] 2019 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO) - Study on Anti-reflection Performance of Titanium Alloy Based on the Change of Repeat Times of Nanosecond Laser Processing
摘要： A new and accurate edge extension formula based on the Taguchi method is proposed to calculate the resonant frequency of electrically thin and thick rectangular patch antennas with an air gap (RPAAG) and rectangular patch antennas without an air gap. Based on 3205 antennas data random distribution in the electrical substrate thickness h/λd ranging from 0.001 to 0.2 and the dielectric constant ranging from 1.0 to 10.2, the edge extension formula is created with the Taguchi method. The resonant frequencies predicted using the proposed formula are in better agreement with simulated and measured results than those calculated with the existing formulas in other literatures, especially for electrically thick substrates. Furthermore, experimental results for the RPAAG are given, which shows that h/λd should be less than 0.13 in the design of a capacitively fed RPAAG.
关键词： Edge extension formula,resonant frequency,electrically thin and thick substrates,rectangular patch antenna with and without an air gap,Taguchi method
更新于2025-09-23 15:21:01
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PERFORMANCE IMPROVEMENT OF PATCH ANTENNA USING CIRCULAR SPLIT RING RESONATORS AND THIN WIRES EMPLOYING METAMATERIALS LENS
摘要： In this paper, the left-handed metamaterial which acts as a lens is employed to improve the performance of a microstrip patch antenna. The left-handed metamaterial used in this work is a three-dimensional periodic structure which consists of circular split ring resonators and thin wires. The three-dimensional periodic metamaterial structure shows angular independency characteristics in wide range angles, so it acts as a metamaterial lens. However, the MTM structure in?nite periodicity truncation has no impacts on the MTM lens scattering, e?ective parameters and homogeneity. The left-handed metamaterial is placed in front of the microstrip patch antenna and due to the negative refractive index property of the left-handed metamaterial; the radiated electromagnetic beam size decreases which results in a highly focused beam. The proposed antenna has been designed and simulated using CST microwave studio, and the metamaterial e?ective parameters are extracted from the S parameters by using Nicolson-Ross-Weir algorithm and by selecting the appropriate ambiguity branch parameter. Furthermore, the angular independency of the metamaterial lens has been veri?ed by rotating the metamaterial structure with respect to the excitation probe of the transverse electromagnetic waves and extracting the S-parameters and the e?ective parameters for each rotation angle. A parametric analysis has been performed to study the e?ects of the patch antenna and left-handed metamaterial lens separation and the size of the three-dimensional left-handed metamaterial structure on the radiating properties and the impedance matching of the proposed antenna. For the experimental veri?cation, the proposed antenna operating at 10 GHz is fabricated; the return loss, radiation pattern and gain for the proposed antenna with and without metamaterial are measured. Furthermore, the results show that the antenna gain is improved by 4.6 dB which validates the concept of beam focusing using negative refractive index metamaterial structure, while the return loss and bandwidth are slightly reduced. The simulation and experiment investigated the idea of the beam focusing using negative refractive index metamaterial lens in microwave regime.
关键词： microstrip patch antenna,CST microwave studio,beam focusing,Nicolson-Ross-Weir algorithm,parametric analysis,left-handed metamaterial,circular split ring resonators,negative refractive index,angular independency,experimental verification,thin wires
更新于2025-09-23 15:21:01
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[IEEE 2018 19th International Conference on Electronic Packaging Technology (ICEPT) - Shanghai, China (2018.8.8-2018.8.11)] 2018 19th International Conference on Electronic Packaging Technology (ICEPT) - Batch-Mode μUSM Process for Surrounding Air Cavity and TCV Holes of AlN Ceramic Substrate Application for Patch Antenna
摘要： Narrow bandwidth of miniaturization patch antenna caused by substrate material severely limits its applications, fabricating air cavity on AlN ceramic substrate for decreasing its dielectric constant is a potential method for increasing the bandwidth. But it’s a critical challenge for simultaneous fabricating of surrounding air cavity and TCV holes on AlN ceramic substrate with high precision. This paper presents a patch antenna on AlN ceramic substrate with surrounding air cavity and TCV holes. And its key process of surrounding air cavity and TCV holes fabrication on AlN ceramic is developed by batch-mode μUSM. AlN ceramic simple with step depth of surrounding air cavity and TCV blind hole is machined simultaneously. Its machining feature resolution and surface roughness are below 1μm and Ra 200nm respectively, machining removal rate is higher than 4.5μm/min. The patch antenna property is simulated and analyzed, the results show the increment of bandwidth reach up to 68.42% because of the surrounding air cavity existing.
关键词： AlN ceramic,simultaneous machining,patch antenna,surrounding air cavity and TCV holes,batch-mode μUSM
更新于2025-09-23 15:21:01
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Development of a Flexible Tunable and Compact Microstrip Antenna via Laser Assisted Patterning of Copper Film
摘要： Design and rapid prototyping of a tunable and compact industrial, scientific and medical (ISM) band microstrip antenna for applications is presented in this paper. Laser machining is introduced as a fast and accurate method for the antenna fabrication. The antenna, with an overall dimension of 65 × 46 × 0.127 mm, was fabricated by sandwiching a flexible Kapton polyimide substrate, with a dielectric constant of 3.5, between two flexible copper tapes, as the radiating patch and ground plane, respectively. The radiating patch was patterned in a meander configuration, with three slots, demonstrating the capability to reduce the resonant frequency of the microstrip antenna from 2.4 GHz to 900 MHz, without increasing the overall size of the antenna (87% compact). The effect of mechanical stress on the antenna performance was investigated by performing bend and stretch tests. The antenna was subjected to compressive bend with a minimum radius of curvature of 86 mm and 150 mm along the x- axis and y- axis which resulted in a maximum increase of resonant frequency by 3.1% and 1.3%, respectively. Similarly, the antenna was subjected to tensile bend with a minimum radius of curvature of 79 mm and 162 mm along the x- axis and y- axis which resulted in a maximum decrease of the resonant frequency by 4.2% and 0.3%, respectively. An overall 0.9% decrease in the resonant frequency was measured for an applied strain of 0.09% during stretching the antenna along the y- axis.
关键词： mechanical stress,flexible Kapton substrate,Compact tunable antenna,microstrip patch antenna,laser machining
更新于2025-09-23 15:19:57
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Folded aperture coupled patch antenna fabricated on FPC with vertically polarised end-fire radiation for fifth-generation millimetre-wave massive MIMO systems
摘要： The authors proposed a folded aperture-coupled patch antenna (ACPA) on a flexible printed circuit (FPC) with vertically polarised end-fire radiation, suitable for fifth-generation millimetre-wave massive multi-input–multi-output (MIMO) systems. For low-cost implementation, antenna elements were fabricated on a single polyimide substrate. The fabricated FPC was first folded to implement a three-layer ACPA, and then the feed line was bent 90° to achieve end-fire radiation. Measurement of five antenna samples demonstrates that the resonance frequency lies between 27.7 and 28.3?GHz. Each antenna sample has the bandwidth (|S11|?<??10?dB) >1.2?GHz. The measured antenna gain is 2.74?dBi at 28.1?GHz, and the difference between co- and cross-polarised radiation intensities is >15?dB in all directions of interest. To improve the impedance bandwidth and the gain further, they increased the distance between the patch and the aperture of the proposed antenna by folding the fabricated FPC multiple times without an additional layer. Experimental results confirm the bandwidth of 2.64?GHz (26.27–28.91?GHz) and the gain of 3.80?dBi at 28?GHz. Additionally, the 1?×?8-folded APCA array is simulated to verify the feasibility for a practical application of multi-beam massive MIMO technology.
关键词： flexible printed circuit,fifth-generation millimetre-wave,massive MIMO systems,folded aperture-coupled patch antenna,vertically polarised end-fire radiation
更新于2025-09-23 15:19:57
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[IEEE 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC) - Fukuoka, Japan (2019.7.7-2019.7.11)] 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC) - Significant Propagation Loss Reduction on Silicon High-Mesa Waveguides Using Thermal Oxidation Technique
摘要： This letter presents a new recon?gurable antenna associated with a plasma Faraday shield effect. The Faraday shield effect is realized by using a ?uorescent lamp. A patch antenna operating at 2.45 GHz is placed inside the lamp. The performance of the recon?gurable system is observed in terms of gain, and radiation patterns by simulation and measurement. It is shown that by switching ON the ?uorescent lamp, the gain of the antenna decreases and the antenna system keeps a good matching at the operating frequency. This recon?gurable antenna can be used to avoid coupling with other communications or radar systems working in the same frequency band.
关键词： Patch antenna,recon?gurable plasma Faraday shield effect.
更新于2025-09-23 15:19:57
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[IEEE ESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference (ESSCIRC) - Cracow, Poland (2019.9.23-2019.9.26)] ESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference (ESSCIRC) - Adaptive Peak Average Current Control LED Driver for Automotive Lighting
摘要： This letter presents a new recon?gurable antenna associated with a plasma Faraday shield effect. The Faraday shield effect is realized by using a ?uorescent lamp. A patch antenna operating at 2.45 GHz is placed inside the lamp. The performance of the recon?gurable system is observed in terms of gain, and radiation patterns by simulation and measurement. It is shown that by switching ON the ?uorescent lamp, the gain of the antenna decreases and the antenna system keeps a good matching at the operating frequency. This recon?gurable antenna can be used to avoid coupling with other communications or radar systems working in the same frequency band.
关键词： Patch antenna,recon?gurable plasma Faraday shield effect.
更新于2025-09-23 15:19:57