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[IEEE 2018 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) - Nagoya (2018.8.29-2018.8.31)] 2018 IEEE International Workshop on Electromagnetics:Applications and Student Innovation Competition (iWEM) - Dual-Strip Monopole Antenna for USB Dongle Applications
摘要： In the paper, a design of dual-path folded monopole antenna for WLAN bands and 5G C-Band on dongle devices is presented. The antenna occupies an overall size of 30 × 10 × 4.8 mm3; the size of ground plane is 25 × 10 mm2. A Dual-strip monopole antenna with two bending plates to from a 3D structure excites the WLAN band and 5G C-band for USB dongle devices. The measured and simulated S11 of the antenna can be applied to WLAN bands (2.4 — 2.484, 5.15 — 5.35, and 5.725 — 5.825 GHz), 5G C-band (3.4 — 3.6 GHz). The more results of the antenna will be proposed and discussed in the paper.
关键词： USB,C-band,Dongle,WLAN antenna
更新于2025-09-23 15:22:29
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[Communications in Computer and Information Science] Advances in Signal Processing and Intelligent Recognition Systems Volume 968 (4th International Symposium SIRS 2018, Bangalore, India, September 19–22, 2018, Revised Selected Papers) || Design of a Compact High Gain Wide Band Ψ Shaped Patch Antenna on Slotted Circular Ground Plane
摘要： A compact wideband high gain W shaped patch antenna on circular ground plane is proposed. The patch is designed and fabricated on FR4 substrate with a thickness of 1.6 mm and is compact in size as 122.7 mm2 including ground plane. The SMA connector with a center radius of 0.36 mm is connected at a coordinate (x = 5 mm, y = 3.3125 mm) as a feeding line to give RF signal as input. A wide impedance bandwidth is obtained due to the slots on the radiating element and by placing shorting post near zero potential ?elds makes the structure compact. An impedance bandwidth is further enhanced by placing an inverted U-slot on ground plane. The proposed structure is resonating at ?ve different frequencies 1.924 GHz, 2.88 GHz, 5.29 GHz, 8.58 GHz and 12.27 GHz yields an impedance bandwidth of 345 MHz, 92 MHz, 200 MHz and 4.77 GHz respectively. Re?ection coef?cient (S11) at 8.58 GHz & 12.27 GHz is ?36.37 dB and ?44.61 dB respectively. The proposed antenna is giving a maximum gain of 6.1 dB and has a stable radiation pattern with in the resonating band. The designed antenna is fabricated and is experimentally validated for the results. It reveals that the proposed antenna is suitable for WLAN and X band applications.
关键词： X band,Circular ground plane,WLAN band,Shorting post,Inverted U slot
更新于2025-09-23 15:22:29
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COMPACT CPW-FED MULTIBAND ANTENNA FOR TD-LTE/WLAN/WIMAX APPLICATIONS
摘要： A compact coplanar waveguide fed multiband antenna is proposed and investigated. The proposed antenna consists of a rectangular radiating patch and dual meander strips with a defected ground plane. The size of the fabricated prototype is 28.3 × 24 × 1.59 mm3. The proposed antenna radiates at three di?erent resonant modes, which cover 2.29–2.63 GHz, 3.26–3.96 GHz, and 4.97–6.10 GHz. The proposed antenna can be used for TD-LTE 2300/2500 (2.305–2.4 GHz), WLAN (2.4–2.4835 GHz and 5.15–5.875 GHz) and WiMAX (2.3–2.4 GHz and 3.3–3.7 GHz) applications. The proposed antenna exhibits an omnidirectional radiation pattern in the H-plane and a dipole-like radiation pattern in the E-plane. The measured peak gains are 2.64/4.48/6.08 dBi at 2.4/3.5/5.5 GHz operating frequency bands, respectively.
关键词： TD-LTE,WLAN,CPW-fed,WiMAX,multiband antenna,compact
更新于2025-09-23 15:21:21
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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 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Quantum States of Heralded Photons
摘要： In this paper, the design and the development of a remote system for continuous monitoring of leakage currents and ground currents in high voltage electrical substations are proposed. Based on wireless local area network technology, the system can be used to monitor continuously a variety of plants within the substation and has low power consumption with inbuilt overvoltage protection. It consists of a transmitter module equipped with a data acquisition (DAQ) system connected to leakage current and voltage sensors, and a receiver module connected to a remote controller for data processing and storage. The principle of operation and the characteristics of the various components of the system are described. Validation tests have been used to verify its performance in three different test situations: A) laboratory monitoring of the leakage current and voltage of a distribution surge arrester; B) laboratory measurement of the leakage current of an outdoor insulator; and C) ?eld monitoring of the earth current and potential rise of high-voltage tower. The measured results are in close agreement with those recorded directly through a DAQ card with ?ber-optic and coaxial cable connected systems. Data processing is carried out at the receiving end so that the monitored parameter is displayed continuously or at speci?ed time intervals. The operation of the system has been tested and proved resilient under high-frequency interference signals such as those generated by corona and surface discharges.
关键词： wireless transmission,solar power,surge arrester,data acquisition,high-voltage substation,leakage current measurement,insulator,WLAN system,Continuous monitoring
更新于2025-09-23 15:21:01
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[IEEE 2019 International Topical Meeting on Microwave Photonics (MWP) - Ottawa, ON, Canada (2019.10.7-2019.10.10)] 2019 International Topical Meeting on Microwave Photonics (MWP) - [Front cover]
摘要： Efficient power management of the radio is a critical requirement for the battery-operated portable electronic devices incorporating wireless transceivers to have a longer runtime. The power management function of IEEE 802.11 wireless local area networks (WLANs) allows stations (STAs) to operate in the doze mode to save energy significantly. In this paper, the enhanced timer-based power management (E-TPM) scheme, which supports the applications with delay-intolerant uplink traffic (DIUT), is presented for infrastructure IEEE 802.11 WLANs. With E-TPM, the radio transceiver of the dozing STA is woken up right away when an outgoing frame is generated by the STA so that DIUT is transmitted in a timely manner. In addition, a novel model for stochastic analysis of the E-TPM is developed. Based on this model, the probabilities that an STA is active, idle, or dozing are derived, and the power consumption of the STA, the number of frames buffered at the access point (AP) for the STA operating in doze mode, and the average delay per frame are obtained. These results enable an efficient power management algorithm that optimizes the idle timer and doze duration at the STA so that the doze mode does not result in extra delay in DIUT, and the delay of downlink traffic is controlled within a given bound. Numerical results show that the proposed E-TPM is able to considerably reduce delay with limited available memory space at the AP.
关键词： Energy conservation,IEEE 802.11,wireless local area network (WLAN),power management
更新于2025-09-23 15:21:01
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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) - A Compact Bandpass Filter Using Microstrip Hairpin Resonator for WLAN Applications
摘要： This work represents a microstrip hairpin resonator-based bandpass filter for Wireless Local Area Network (WLAN). Two short-circuited microstrip comb-lines have been coupled at the two sides of a rectangular-loop to construct the hairpin resonator. The Taconic TLX-8 material has been used as the substrate to design the filter at a center frequency of 2.45 GHz. The designed filter exhibits a two-pole Chebyshev response with an insertion loss of -0.37 dB and a minimum return loss of -34.03 dB. This compact filter has a fractional bandwidth of 4.37% which sharply selects the entire bandwidth of WLAN frequencies.
关键词： hairpin resonator,bandpass,WLAN,ISM band,filter,microstrip
更新于2025-09-23 15:21:01
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FREQUENCY RECONFIGURABLE TRIPLE BAND-NOTCHED ULTRA-WIDEBAND ANTENNA WITH COMPACT SIZE
摘要： A compact planar recon?gurable triple band-notched UWB Microstrip antenna is proposed in this paper for UWB applications. A band rejection at ITU 8-GHz is generated by inserting an inverted U-shaped metallic strip at the slotted ground plane. Moreover, by cutting two slots on radiating patch, the second rejection at 3.6 GHz for WiMAX and the third rejection at 5.5 GHz for WLAN application are generated. Then, by embedding two (PIN) diodes along the patch slots, switchable dual or single band-notched behavior is added to the antenna performance. The simulated and measured results show that the antenna can operate in a wider bandwidth from 3.1 GHz to 11 GHz, and it has a good omnidirectional radiation pattern with stable gain. Furthermore, the designed antenna has a simple structure and compact size of 20 × 20 mm2. The proposed antenna can use the full potential of UWB frequency range with recon?gurable band-notched behavior at 3.6, 5.5, 8.1 GHz to avoid interference with WiMAX, WLAN, ITU systems respectively.
关键词： WLAN,band-notched,WiMAX,recon?gurable,UWB antenna,ITU
更新于2025-09-23 15:21:01
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A NOVEL COMPACT THREE-PORT DIELECTRIC RESONATOR ANTENNA WITH RECONFIGURABLE PATTERN FOR WLAN SYSTEMS
摘要： Splitting a cylinder dielectric resonator into four uniform quarters generates a new dielectric resonator antenna (DRA) shape, which is named a quarter volume of cylinder dielectric resonator antenna (QVCDRA) in the paper. On the basis, a novel compact three-port dielectric resonator antenna with recon?gurable radiation pattern is presented for WLAN systems at 5.2 GHz. A ?10 dB impedance bandwidth of 16.20%, covering the frequency range from 4.75 GHz to 5.54 GHz, is obtained with an isolation of lower than ?19 dB. The structure consists of three QVCDRAs that arrange evenly around Z axis, and as a result possesses the advantage of compact structure, wide impendence band and recon?gurable radiation patterns. The volume of the proposed three-port DRA without ground plane is only 0.0216λ3 d (λd is the dielectric wave length at the central operation frequency). The proposed antenna is analyzed in detail. Antenna prototype is fabricated and tested. The simulation and test results are in good agreement.
关键词： wide impendence band,dielectric resonator antenna,WLAN systems,compact structure,recon?gurable radiation pattern
更新于2025-09-23 15:19:57
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[IEEE 2018 International Conference on Applied Electromagnetics, Signal Processing and Communication (AESPC) - Bhubaneswar, India (2018.10.22-2018.10.24)] 2018 International Conference on Applied Electromagnetics, Signal Processing and Communication (AESPC) - Temperature effect on a-SiCN:H waveguide for application of sensing
摘要： Long term evolution-wireless local area network (LTE-WLAN) aggregation (LWA) has recently emerged as a promising third generation partnership project (3GPP) Release 13 technology to efficiently aggregate LTE and WLAN at the packet data convergence protocol layer, allowing uplink traffic to be carried on LTE and downlink on both LTE and WLAN. This removes all the contention asymmetry problems of WLAN and allows an optimum usage of both licensed and unlicensed band for downlink. In this paper, we present a new feature of LWA, its flow control scheme, which controls how to aggregate downlink traffic in licensed and unlicensed bands. This aggregation technique exploits user equipment-based flow control feedback in the form of LWA status reports, and can be expanded to work with any number of frequency bands and radio technologies. The same concepts apply to 5G networks, although the performance evaluation provided here is in the context of LTE-Advanced Pro. Simulation results in a typical enterprise scenario show that LWA can enhance user performance up to 8 times over LTE-only, and 3.7 times over WLAN only networks, respectively. The impact of the file size and LWA status report frequency on network performance is also investigated.
关键词： wireless local area network (WLAN),aggregation,LTE WLAN aggregation (LWA),flow control,long term evolution (LTE),Cellular networks
更新于2025-09-19 17:13:59