Antenna parameters

In this paper, the Long-short term memory network model is used to estimate the direction of incoming signals for the Uniform Circular Antenna array. The performance of this method is evaluated based on the RMSE parameter and compared with the MUSIC algorithm in different cases such as the deviation of incident angle of radiation sources, and signal-to-noise ratio...

7p viannee 04-08-2023 7 4   Download

This paper presents some research results in building a solution for generating radio target signals for electronic warfare complexes on ships. The radio target signals with remotely configurable parameters (including carrier frequency, pulse width, pulse repetition frequency, and pulse beam width) are generated and transmitted to the receiving antenna of the reconnaissance and jamming equipment; thereby, we perform tests and evaluate some functions of the complex.

5p viwmotors 02-12-2022 7 2   Download

In this paper, with the simulated signal data set obtained at the linear antenna array (ULA), the Long Short-Term Memory (LSTM) network model is used to estimate the DOA. The performance of the method is evaluated based on the RMSE parameter and compared with MUSIC, DNN algorithms in different cases such as: deviation of incident angle of radiation sources, signal-to-noise ratio (SNR).

6p vigeneralmotors 13-07-2022 15 7   Download

In this paper, a multiple-input multipleoutput (MIMO) antenna with high isolation is designed using defected ground structure (DGS). The proposed antenna is constructed by two sets of four elements (2 × 2), which are designed at the central frequency of 3.5 GHz for Worldwide Interoperability for Microwave Access (WiMAX) applications. The antenna is fabricated on a FR4 substrate with an overall size of 144 × 99 × 1.6 mm. Thanks to DGS, the designed MIMO antenna achieves a high isolation of 30 dB and a high radiation efficiency of over 90%. Besides, this MIMO antenna attains a 7.5 dBi gain.

7p nguaconbaynhay10 22-01-2021 17 1   Download

This paper presents a microstrip antenna design which it's radiating element is circular and applied to 5G systems. The model and parameters of the antenna were simulated and analyzed by High-Frequency Structure Simulator (HFSS) computer code on FR4-epoxy laminate microwave.

7p viv2711 14-10-2020 16 1   Download

This article investigates digital predistortion (DPD) linearization of hybrid beamforming large-scale antenna transmitters. We propose a novel DPD processing and learning technique for an antenna sub-array, which utilizes a combined signal of the individual power amplifier (PA) outputs in conjunction with a decorrelation-based learning rule. In effect, the proposed approach results in minimizing the nonlinear distortions in the direction of the intended receiver. This feature is highly desirable, since emissions in other directions are naturally weak due to beamforming.

11p son248 24-03-2020 25 4   Download

Recently terrestrial digital broadcasting systems have experienced a growth with the demand of high-data rate. In order to meet such demand, the multiple-input multiple-output (MIMO) technology has received wide attention. This paper proposes a pre-coding method, which provides high-space channel correlation for the improved performance over terrestrial broadcasting channels when the MIMO spatial multiplexing (SM) is adopted for digital video broadcasting-next generation handheld systems.

5p son248 24-03-2020 22 2   Download

Part 2 of the document Design and applications automotive antenna present the content: TV antennas for cars, satellite TV antennas, ridged waveguide antenna array, electronic beam-controlled phase array, antennas for digital terrestrial TV; satellite radio antennas, basic passive antenna requirements, system with two antenna elements, system with single patch antenna element, GPS antennas, typical GPS antenna parameters, circular annular ring microstrip antenna; antennas for short range communication, compact planar passive antenna, alternative antenna systems for short range communication.

163p anthachluu 05-08-2019 47 2   Download

Part 1 of the document Design and applications automotive antenna present the contentL: automotive antennas overview patents, papers and products; basic antenna parameters and definitions; active and diversity receiving antenna systems; audio broadcasting antennas; cellular antennas. Invite you to refer.

169p anthachluu 05-08-2019 29 1   Download

The improvement of antenna parameters is very important. A 4 x 4 array antenna with improved parameters by using multiple substrate layers and Electromagnetic Band Gap (EBG) structure is proposed in this paper.

8p viengland2711 23-07-2019 14 0   Download

This paper will propound an antenna covering the range of frequencies from 1.53 GHz to 2.53 GHz that includes 1.575 GHz, 1.8 GHz, 1.9 GHz ,and 2.1 GHz. The developed quasi-Yagi antenna has a simple-low profile and achieves a bandwidth of 48%, a front- to- back ratio of 19 dB, a gain of 6dBi, and an efficiency of better than 78% at 2.1GHz. In this paper, the study on effects of parameters of the antenna is also investigated to achieve optimal model.

10p minhxaminhyeu3 25-06-2019 19 1   Download

This paper proposes a novel structure of the inverted F antenna based on meandering and folding methods for the monopole antenna placed on FR4 dielectric plate. The proposed antenna has compact size (21 mm × 14 mm × 3.2 mm). Moreover, this antenna still offers enough wide bandwidth (VSWR ≤ 2), which covers 3G bandwidth. Using the simulation program to optimize antenna structure and calculate the antenna parameters in order to verify its applicability for the 3G mobile devices.

7p vixyliton2711 17-04-2019 39 1   Download

This paper mainly deals with the design of Microstrip rectangular patch array antenna on liquid crystal substrate at 40GHz. The antenna parameters are simulated using commercial Ansoft HFSS software and the detailed explanation of performance evaluation is presented.

6p byphasse043256 21-03-2019 17 0   Download

This paper deals with the collision avoidance radar based antenna performance characteristics. This antenna can be placed inside the vehicle and it receives the signals from the base station and warns the driver accordingly. If any accident occurs to that vehicle, then that information is also passes to substation for help. The proposed antenna is designed on liquid crystal substrate and all its output parameters are simulated and presented in this work.

5p girlsseek 27-02-2019 19 0   Download

This book explores both the state-of-the-art and the latest achievements in UWB antennas and propagation. It has taken a theoretical and experimental approach to some extent, which is more useful to the reader. The book highlights the unique design issues which put the reader in good pace to be able to understand more advanced research.

0p cucdai_1 19-10-2012 50 6   Download

S/N ratio should be above a certain threshold (a function of modulation scheme). Signal power should be above the sensitivity threshold. Predict received signal strength when the transmitter and receiver have a clear line-of-sight path between them.

57p nhq_khtn 12-03-2011 103 35   Download

The increasing demand for communications services and the desire for increased data throughput in modern communications systems has fueled research and development into the use of adaptive antenna arrays. Since frequency bandwidth is in short supply and is expensive to acquire, the ability to separate users based on their spatial parameters is very attractive for wireless networks. Adaptive antenna arrays offer the ability to increase the Signal-to-Noise Ratio (SNR) of a wireless communication link while at the same time permit the cancellation and removal of co-channel interference. ...

39p tienvovan 16-09-2010 73 6   Download

RF/IF Conversion Segment Tradeoffs This chapter introduces the system-level design tradeoffs of the RF conversion segment. Software radios require wideband RF/IF conversion, large dynamic range, and programmable analog signal processing parameters. In addition, a high-quality SDR architecture includes specific measures to mitigate the interference readily generated by SDR operation. I. RF CONVERSION ARCHITECTURES The RF conversion segment of the canonical software radio is illustrated in Figure 8-1. The antenna segment may provide a single element for both transmission and reception....

24p tienvovan 11-09-2010 102 7   Download

Receiver System Parameters A receiver picks up the modulated carrier signal from its antenna. The carrier signal is downconverted, and the modulating signal (information) is recovered. Figure 5.1 shows a diagram of typical radio receivers using a double-conversion scheme. The receiver consists of a monopole antenna, an RF amplifier, a synthesizer for LO signals, an audio amplifier, and various mixers, IF amplifiers, and filters.

23p vaseline 30-08-2010 111 23   Download

Various Components and Their System Parameters An RF and microwave system consists of many different components connected by transmission lines. In general, the components are classified as passive components and active (or solid-state) components. The passive components include resistors, capacitors, inductors, connectors, transitions, transformers, tapers, tuners, matching networks, couplers, hybrids, power dividers=combiners, baluns, resonators, filters, multiplexers, isolators, circulators, delay lines, and antennas. ...

38p vaseline 30-08-2010 109 20   Download