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This study introduces RTEEMF (Real-Time Evaluation Electromagnetic Field)-PhoneAnts, a novel Deep Learning (DL) framework for the efficient evaluation of mobile phone antenna performance, addressing the time-consuming nature of traditional full-wave numerical simulations. The DL model, built on convolutional neural networks, uses the Near-field Electromagnetic Field (NEMF) distribution of a mobile phone antenna in free space to predict the Effective Isotropic Radiated Power (EIRP), Total Radiated Power (TRP), and Specific Absorption Rate (SAR) across various configurations. By converting antenna features and internal mobile phone components into near-field EMF distributions within a Huygens' box, the model simplifies its input. A dataset of 7000 mobile phone models was used for training and evaluation. The model's accuracy is validated using the Wilcoxon Signed Rank Test (WSR) for SAR and TRP, and the Feature Selection Validation Method (FSV) for EIRP. The proposed model achieves remarkable computational efficiency, approximately 2000-fold faster than full-wave simulations, and demonstrates generalization capabilities for different antenna types, various frequencies, and antenna positions. This makes it a valuable tool for practical research and development (R&D), offering a promising alternative to traditional electromagnetic field simulations. The study is publicly available on GitHub for further development and customization. Engineers can customize the model using their own datasets. [ABSTRACT FROM AUTHOR]

This study introduces RTEEMF (Real-Time Evaluation Electromagnetic Field)-PhoneAnts, a novel Deep Learning (DL) framework for the efficient evaluation of mobile phone antenna performance, addressing the time-consuming nature of traditional full-wave numerical simulations. The DL model, built on convolutional neural networks, uses the Near-field Electromagnetic Field (NEMF) distribution of a mobile phone antenna in free space to predict the Effective Isotropic Radiated Power (EIRP), Total Radiated Power (TRP), and Specific Absorption Rate (SAR) across various configurations. By converting antenna features and internal mobile phone components into near-field EMF distributions within a Huygens’ box, the model simplifies its input. A dataset of 7000 mobile phone models was used for training and evaluation. The model’s accuracy is validated using the Wilcoxon Signed Rank Test (WSR) for SAR and TRP, and the Feature Selection Validation Method (FSV) for EIRP. The proposed model achieves remarkable computational efficiency, approximately 2000-fold faster than full-wave simulations, and demonstrates generalization capabilities for different antenna types, various frequencies, and antenna positions. This makes it a valuable tool for practical research and development (R&D), offering a promising alternative to traditional electromagnetic field simulations. The study is publicly available on GitHub for further development and customization. Engineers can customize the model using their own datasets.

This study aims to analyze the signal quality of the building profile factor at the Ballroom of Tentrem Hotel Yogyakarta, organized by the value of RSL (Received Signal Level) as an indicator of signal strength level of each access point of the Tentrem Hotel Ballroom meeting room, and calculate other parameters such as EIRP (Effective Isotropic Radiated Power), free space loss with theoretical and measurement levels. Receive level signals in the field using the Netsurveyor and Vistumbler applications installed on the laptop and the Wifi Overview and Wifi Analyzer app installed on the smartphone. From the results of both RSL calculations in theory and its changes. Damping factors in the field such as diffraction effect, refraction, reflection, absorption or blocking. The average field summary shows the RSL values in turn "very good" and "good" there is no "low" indicator, the connection in every meeting room of Tentrem Hotel Ballroom is good and normal. Will, found some problems in the field that can cause a decrease in signal quality so that efforts need to optimition. Keywords: Wireless Local Network, Received Signal Level, Effective Isotropic Activated Power, free space loss.

For the selection of data link site,a mathematical modeling is carried out by using raster analysis method,and the data link site selection optimization is transformed into 0-1 integer programming problem. Based on the maximum coverage area model and the maximum coverage value model,the procedure for solving the coverage area by radio spectrum planning and management software is presented,and the calculation cases of selecting 4 sites in the existing 5 sites are designed. On the basis of the userdefined coverage area,allowableable station establishing area,type ofestablished station,type of receiving station,and the number of established stations,a coverage scheme is determined,the parameters,such as site layout conditions,coverage conditions and evaluation conditions,are set,and the cost evaluation analysis and the coverage optimization are made. The fast optimization technology combining electronic map and coverage model is used to improve the computing efficiency of site selection process. The research method is suitable for the construction demonstration,and operation and maintenance management of data link site. [ABSTRACT FROM AUTHOR]

The characterization of the performance of wireless devices plays a significant role in developing radio products that meet the demands of the latest standards and deliver a satisfying user experience. With current standard total isotropic sensitivity (TIS) measurement, the transmitters are set to work at their maximum transmission power level. However, the standard TIS test procedure is unable to accurately reflect a receiver's performance because in actual usage transmitters are rarely working at their maximum power level. In measurements, different kinds of devices hold different maximum power levels. The measured radio sensitivity depends on the instantaneous local temperature of the radio, and the local temperature depends on the heat generation (power levels), the heat dissipation, and time. So the power levels and the thermal conditions could affect their radio sensitivity and, hence, the TIS. With standard TIS methods, the maximum power level and the radio's thermal condition cause ambiguity in the measurements. However, this paper proposes a new objective TIS method. With this new TIS method, the measured TIS is a function of the transmitter power level at its thermally stable condition. The proposed method resolves the ambiguity of the TIS measurement. [ABSTRACT FROM PUBLISHER]

A portable white space device(WSD) obeying the Korean regulations of TV white space(TVWS) can cause harmful interference to a digital TV receiver residing at the same pixel around the edge of the digital TV service coverage for the case with a changed propagation environment. In order to solve this problem, we propose a method to allocate the resource of a hybrid WSD based on TVWS geo-location DB with spectrum sensing. Using the received power of digital TV signal through the spectrum sensing, a hybrid WSD can calculate the maximum permitted EIRP based on location probability. Based on the accurate allocation method proposed in this paper, it is possible to satisfy the Korean TVWS regulations and to eliminate the harmful interference to TV receivers nearby the hybrid WSD. [ABSTRACT FROM AUTHOR]

A single-layer CPW-fed active patch antenna oscillator at 2.76 GHz is presented. The patch antenna acts both as a resonator and a radiator. Electromagnetic coupling is utilized for providing the appropriate closed-loop positive feedback. The active antenna is built around a commercially available GaAs MMIC on a low-permittivity εr =2.33 Duroid 5870 substrate. The measured effective isotropic radiated power (EIRP) is 20 dBm, whereas the front-to-back ratio is about 12 dB with the cross-polarized fields better than -15 db. The measured phase noise is -87.5 dBc/Hz at a 100-kHz offset away from the carrier. The structure only requires a single substrate, is compatible with uniplanar technology, and results in a low-component count [ABSTRACT FROM PUBLISHER]