- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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OPTIMAL DESIGN OF A KU/KA-BAND WIDE-FLARE-ANGLE CORRUGATED HORN USING THE DIFFERENTIAL EVOLUTION ALGORITHM
摘要： A novel wide-flare-angle corrugated horn covering the full Ku/Ka satellite communication frequency bands is designed and optimized. In order to satisfy the rigorous bandwidth requirements, a spline-profiled smooth section and a corrugated section with ring-loaded slots are introduced into the wide-flare-angle horn design. Instead of the “trial-and-error” method, the Differential Evolution (DE) algorithm is employed to obtain the optimum dimensions of the proposed horn. A prototype of the optimized horn is constructed and measured. Both simulated and measured results show that the proposed horn has good radiation and impedance performance. The performance of the horn is also demonstrated as a feed in a typical dual-reflector antenna. Simulation results show that the overall antenna system meets the usual performance requirements.
关键词： Ku/Ka-band,satellite communication,wide-flare-angle corrugated horn,Differential Evolution algorithm
更新于2025-09-23 15:21:21
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Design of a Broadband Coplanar Waveguide-Fed Antenna Incorporating Organic Solar Cells with 100% Insolation for Ku Band Satellite Communication
摘要： A broadband coplanar waveguide (CPW)-fed monopole antenna based on conventional CPW-fed integration with an organic solar cell (OSC) of 100% insolation is suggested for Ku band satellite communication. The proposed configuration was designed to allow for 100% insolation of the OSC, thereby improving the performance of the antenna. The device structure was fabricated using a Leiterplatten-Kopierfrasen (LPKF) prototyping Printed circuit board (PCB) machine, while a vector network analyzer was utilized to measure the return loss. The simulated results demonstrated that the proposed antenna was able to cover an interesting operating frequency band from 11.7 to 12.22 GHz, which is in compliance with the International Telecommunication Union (ITU). Consequently, a 3 GHz broadband in the Ku band was achieved, along with an enhancement in the realized gain of about 6.30 dB. The simulation and experimental results showed good agreement, whereby the proposed structure could be specifically useful for fixed-satellite-services (FSS) operating over the frequency range from the 11.7 to 12.22 GHz (downlink) band.
关键词： CPW-fed monopole antenna,satellite communication,P3HT:PCBM,organic solar cell
更新于2025-09-19 17:13:59
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[IEEE 2019 49th European Microwave Conference (EuMC) - Paris, France (2019.10.1-2019.10.3)] 2019 49th European Microwave Conference (EuMC) - Design of Aperture Coupled Feeding Ku-Band Phased Array Antenna on Multi-Layer PCB for Satellite Communications
摘要： In a phased array antenna system, beamforming integrated circuit (IC) is located directly behind the antenna and uses a multi-layer printed circuit board (PCB). As the frequency band becomes higher, the direct via feed method is not suitable for multi-layer PCB structure due to the decrease of transmission characteristics and the increase of manufacturing difficulty by use of blind via. This paper introduces the antenna using an aperture coupled feeding technique on multi-layer PCB for a Ku-band phased array antenna system. To verify the design, an antenna prototype is developed and measured at Ku-band for satellite applications. The antenna operates with left-handed circular polarization (LHCP) at center frequency of 11.9GHz and a peak gain of 15.2dBic.
关键词： automotive applications,Ku-band,slot antennas,satellite communication,phased arrays
更新于2025-09-12 10:27:22
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[IEEE 2018 IEEE 22nd International Conference on Intelligent Engineering Systems (INES) - Las Palmas de Gran Canaria, Spain (2018.6.21-2018.6.23)] 2018 IEEE 22nd International Conference on Intelligent Engineering Systems (INES) - Resources for Satellite-Based Quantum Communication Networks
摘要： Quantum mechanics-based computing offers revolutionary including in communications. Different out-of-laboratory experiments demonstrated the feasibility of the wired-based quantum free-space communication experiments have been performed. The next step will be a satellite-based quantum network, which will allow global secure communications. In our paper, we describe the requirements for such network and detail our results on a quantum novel, communication network.
关键词： entanglement,quantum,satellite,communication,networks
更新于2025-09-10 09:29:36
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[IEEE 2018 International Conference on Electromagnetics in Advanced Applications (ICEAA) - Cartagena des Indias, Colombia (2018.9.10-2018.9.14)] 2018 International Conference on Electromagnetics in Advanced Applications (ICEAA) - A Low-Profile, Planar, Power-Efficient 2D Beam-Steering Antenna Technology
摘要： The paper explains a recently demonstrated 2D beam-steering antenna technology and its potential to develop a low-cost communication-on-the-move (COTM) terminal antenna. A low-cost COTM antenna is critical for receiving TV and internet via existing geostationary and upcoming low-earth-orbit (LEO) satellite constellations. The new beam-steering technology is based on near-field phase transformation and its working is verified by a prototype design reported recently. Performance indicators of the prototype are compared here with some commercially available COTM terminal antennas. A fully passive design, low-profile, low power requirements, and simple design configuration give the new steering antenna a competitive advantage over existing COTM terminal antennas from KYMETA and ThinKom.
关键词： low-earth-orbit (LEO) satellite,communication-on-the-move (COTM),low-profile,beam-steering antenna,near-field phase transformation
更新于2025-09-10 09:29:36
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[IEEE 2018 20th International Conference on Transparent Optical Networks (ICTON) - Bucharest (2018.7.1-2018.7.5)] 2018 20th International Conference on Transparent Optical Networks (ICTON) - Variable Data Rate for Free Space Optical Low Earth Orbit Downlinks (OLEODL)
摘要： Low-Earth-orbit (LEO) satellites for Earth observation have typical orbit altitudes of 400 to 600km. Since their on-board sensors resolution is advancing, the need for very high rate satellite downlinks is increasing into the range of several gigabits per second. Free-space optical communications is ideal for such applications, as it offers very high data rate, while allowing smaller satellite terminals and avoiding spectral regulation constraints. However, the key challenges in optical LEO downlinks (OLEODL) are the varying free space loss due to distance changes during a downlink contact, atmospheric attenuation, and the fast signal scintillation due to atmospheric index-of-refraction turbulence (IRT). This paper will briefly explain OLEODL technology, its challenges, and suitable mitigation techniques. The paper will focus on why varying the data rate according to channel state is important for OLEODL and how it can be achieved.
关键词： laser communication,OLEODL,variable data rate,optical communication,satellite communication
更新于2025-09-09 09:28:46
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A UEP Method for Imaging Low-Orbit Satellites Based on CCSDS Recommendations
摘要： Remote sensing satellites allow continuous information acquisition from large areas of the earth and have been intensively applied in a number of applications, from agriculture to defense. A major challenge in remote sensing is that satellite communication systems present bandwidth restrictions and several issues typical of time-variant channels, which justifies the need for signal coding techniques. In that sense, this letter proposes an unequal error protection method for aerospace applications using the recommendations for source and channel coding created by the Consultative Committee for Space Data System (CCSDS) as frameworks. The proposed method makes use of the CCSDS-recommended convolutional code to ensure a channel coding step as low complex as possible, which allows implementation in a wide range of embedded platforms. This letter exploits the natural data division delivered by the compressor to unequally protect the information. The proposed method, which relies on a multiobjective optimization problem, allows one to find rate arrangements that minimize the distortion of the received image for a given value of an average coding rate within a granular range. The system performance is evaluated over an additive white Gaussian noise channel model. The obtained results show that the proposed method presents several advantages over an equal error protection strategy, and paves the way for scenarios with stringent energy and bandwidth constraints.
关键词： satellite communication,joint source–channel coding,unequal error protection (UEP),Image coding
更新于2025-09-09 09:28:46
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UWB MONOPOLE ANTENNA WITH TRIPLE BAND-NOTCHED CHARACTERISTIC BASED ON A PAIR OF NOVEL RESONATORS
摘要： In this paper, a novel microstrip-fed compact antenna with triple band-notched characteristics is presented for ultrawideband (UWB) applications. The antenna consists of a circular radiating patch, a 50 ? microstrip feed line, a partially slotted ground plane, and a pair of modi?ed capacitance loaded loop (MCLL) resonators. The novel resonators are symmetrically located in the vicinity of the feed line to achieve triple band-notched characteristics, such as 3.4–3.7 GHz for WiMAX, 5.15–5.825 GHz for WLAN, 7.25–8.395 GHz for X-band satellite communication. The good performance of triple notched bands, stable gain and omnidirectional radiation patterns in the operating bands make the proposed antenna a good candidate for UWB utilization.
关键词： MCLL resonators,WiMAX,monopole antenna,UWB,WLAN,X-band satellite communication,triple band-notched
更新于2025-09-09 09:28:46
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A Novel Model for Predicting Sun Outage in Satellite Communication
摘要： A sun outage is an interruption or distortion of satellite communication signals caused by interference from solar radiation. There is a serious interference to satellite communication services in a special period of time. In the present paper, a novel model for predicting sun outage that is effective and can greatly improve accuracy and precision of sun outage prediction of earth station in satellite communication is presented.
关键词： sun outage,satellite communication,earth station
更新于2025-09-09 09:28:46
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[IEEE 2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) - Mauritius (2018.10.15-2018.10.18)] 2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) - High Gain Fractal Cylindrical Dielectric Resonator Antenna for UWB Application
摘要： In this paper, a novel Fractal Cylindrical Dielectric Resonator Antenna (FCDRA) is presented for Ultra-Wide Band applications is constructed by 300, 600, 1200 angular portion of cylinder with radius ratio (1:2:3). Stacking of Rogers 3010 (εr =10.2) and FR- 4 (εr =4.4) dielectric materials are used in proposed antenna for enhancement of the bandwidth. This fractal geometry offers 9.2 GHz operating bandwidth which spans from 3.6 GHz – 12.8 GHz. Proposed antenna attains maximum gain of 9.45 dBi with more than 89% efficiency which is suitable for satellite communication, WiMAX application. Hybrid Electromagnetic HE11δ, HE12δ modes are identified at 4.43 GHz & 8.31 GHz resonant frequencies respectively.
关键词： WiMAX,FR-4,Rogers 3010,satellite communication,Fractal Cylindrical Dielectric Resonator Antenna,Ultra-Wide Band,Hybrid Electromagnetic modes
更新于2025-09-04 15:30:14