scholarly journals Electromagnetic Field Detector Circuit for Low- Frequency Energy Applications

2015 ◽  
Vol 12 (1) ◽  
pp. 69
Author(s):  
M.M. Bait-Suwailam
Keyword(s):  
Service Providers ◽  
Radiation Detector ◽  
Low Frequency ◽  
Antenna System ◽  
Base Station ◽  
Circuit Board ◽  
Dual Band ◽  
Energy Applications ◽  
Dual Band Antenna ◽  
Em Field

This study details an electromagnetic (EM) field radiation detector system that was developed for near-field low-frequency energy applications. The prototype constitutes the use of a dual-band monopole antenna system as a probe along with a detecting circuit. Furthermore, the prototype was equipped with a qualitative EM radiation strength display unit at its output stage. For proof of concept, the detecting probe was implemented on a printed-circuit board. Both numerical simulations were based on PSpice software (Cadence Design Systems, Inc., San Jose, California, USA) and measurements are presented and discussed. The EM field detector aimed to sense any potential sources of EM radiation from mobile phone units as well as WiFi access points, simultaneously, which is accomplished with the use of the dual-band antenna system. Such a sensitive detector has useful application as a stand-alone monitoring probe for troubleshooting as well as to identify sources of EM radiation interference threats for industrial high-speed electronic devices. Additionally, such a sensor is a potentially useful tool for site testing and scanning for optimal locations of base station masks for telecommunication service providers.  Other prototypes are also presented to illustrate the usefulness of such detectors in some of the aforementioned applications. 

scholarly journals DESIGN OF A DUAL-BAND ANTENNA SYSTEM FOR LTE-M AND LTE-MIMO BY EXPLOITING THE CHARACTERISTIC MODE THEORY

2020 ◽  
Vol 93 ◽  
pp. 11-21
Author(s):  
Kadidiatou Diallo ◽  
Aliou Diallo ◽  
Ibra Dioum ◽  
Samuel Ouya ◽  
Jean Marc Ribero
Keyword(s):  
Antenna System ◽  
Dual Band ◽  
Characteristic Mode ◽  
Mode Theory ◽  
Dual Band Antenna ◽  
Characteristic Mode Theory

Electromagnetic radiation probe using a detector circuit with a dual-band antenna system

2014 ◽  
Author(s):  
Mohammed M. Bait-Suwailam ◽  
Issa Al Balushi ◽  
Mohammed Al Sadairi ◽  
Mohammed Alalawi ◽  
Salim Al Risi
Keyword(s):  
Electromagnetic Radiation ◽  
Antenna System ◽  
Dual Band ◽  
Dual Band Antenna

Side-Frame Dual-Band MIMO Antennas for 5G Smartphone Applications

2021 ◽  
Vol 35 (11) ◽  
pp. 1314-1315
Author(s):  
Guobo Wei ◽  
Quanyuan Feng
Keyword(s):  
Impedance Matching ◽  
Antenna System ◽  
Circuit Board ◽  
Dual Band ◽  
Smartphone Applications ◽  
Mimo Antenna ◽  
Mimo Antennas ◽  
Fifth Generation ◽  
Full Screen ◽  
5 Ghz

A side-frame dual-band multi-input multi-output (MIMO) antenna system for fifth-generation (5G) mobile communication in smartphone applications is presented, operating in 3.5 GHz band (3400-3600 MHz) and 5 GHz band (4800-5000 MHz). The proposed four-element antenna array is placed at four corners of the circuit board and printed on the side edge frame. The height of the structure is only 4.1 mm, which is compatible for ultra-thin full screen smartphones. According to the verification of HFSS and CST, ideal impedance matching bandwidths (superior to 10dB) and excellent isolations (superior to 18 dB) are obtained over the 3.5 GHz band and 5 GHz band, with peak gain of 6.18 dB and 4.9 dB, respectively.

scholarly journals Integrated Dual-Band Antenna System Design Incorporating Cell Phone Bezel

2008 ◽  
Vol 7 ◽  
pp. 585-587 ◽  
Author(s):  
Zhijun Zhang ◽  
Wenhua Chen ◽  
Zhenghe Feng ◽  
M.F. Iskander
Keyword(s):  
System Design ◽  
Cell Phone ◽  
Antenna System ◽  
Dual Band ◽  
Dual Band Antenna

Investigation of 10-port coupled fed slotted MIMO antenna system for 5G mobile handset

2021 ◽  
pp. 1-14
Author(s):  
D. Rajesh Kumar ◽  
G. Venkat Babu ◽  
K.G. Sujanth Narayan ◽  
N. Raju
Keyword(s):  
Antenna Array ◽  
Mimo System ◽  
Multiple Input Multiple Output ◽  
Antenna System ◽  
Circuit Board ◽  
Dual Band ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Mimo Antenna ◽  
Diversity Techniques

Abstract A dual-band 10-port multiple input multiple output (MIMO) antenna array for 5G smartphone is proposed. Each antenna in the MIMO system can work from 3.4 to 3.6 GHz and 5 to 6 GHz with 10 dB (2:1 VSWR) impedance bandwidth. Nevertheless, for a 3:1 VSWR, the antenna operates from 3.3 to 3.8 GHz and 4.67 to 6.24 GHz. The MIMO system is formed by making 10 seven-shaped coupled fed slot antenna elements excited at two different resonant modes and integrated into the system circuit board. By implementing the spatial and polarization diversity techniques, high isolation better than 28 dB between any pair of antenna elements is achieved. The proposed 10-port MIMO antenna array is fabricated and measured. Significant radiation efficiency is obtained, ranging from 65 to 82% for both bands. The antenna gain in the required operating band is substantial, around 3–3.8 dBi. Further, the MIMO parameters such as envelope correlation co-efficient, channel capacity, and total active reflection co-efficient are calculated. The antenna's robustness is estimated by analyzing the user hand effects and specific absorption rate (SAR). The measured results are well agreed with the simulated results.

scholarly journals CSRR based patch antenna for Wi-Fi and WiMAX Applications

2018 ◽  
Vol 7 (3) ◽  
pp. 40-45 ◽  
Author(s):  
S. Nelaturi ◽  
N.V.S.N. Sarma
Keyword(s):  
Frequency Band ◽  
Patch Antenna ◽  
Low Frequency ◽  
Axial Ratio ◽  
Split Ring Resonator ◽  
Dual Band ◽  
Split Ring ◽  
Complementary Split Ring Resonator ◽  
Left Handed ◽  
Dual Band Antenna

In this paper, a novel compact microstrip patch antenna is proposed for Wi- Fi and WiMAX bands. To achieve miniaturization the dimensions of the square radiating patch are chosen with reference to the high frequency band (3.3 GHz). The dual band is achieved by loading a Complementary Split Ring Resonator (CSRR) into the radiating patch. The left handed nature of the CSRR is the cause for low frequency band (2.4 GHz). To improve the return loss bandwidth and axial ratio bandwidth at upper band the fractal concept is introduced along the edges of the square patch. Thus a low volume dual band antenna is simulated using HFSS. A comparison with measured data is also presented. The fabricated antenna is found to be occupying 25% less volume (with reference to 2.4 GHz) than existing antennas which is mainly due to the blending of the two recent concepts ‘metamaterials and fractals’.

Dual-band antenna system for SDARS and GPS applications

2010 ◽  
Author(s):  
K Phaebua ◽  
C Phongcharoenpanich ◽  
D Torrungrueng ◽  
N Surittikul ◽  
W Villarroel
Keyword(s):  
Antenna System ◽  
Dual Band ◽  
Dual Band Antenna

A Miniaturized Dual Band Antenna for Harmonic RFID Tag

2019 ◽  
Vol 2019 (1) ◽  
pp. 000033-000036
Author(s):  
Saikat Mondal ◽  
Saranraj Karuppuswami ◽  
Deepak Kumar ◽  
Amanpreet Kaur ◽  
Premjeet Chahal
Keyword(s):  
Form Factor ◽  
Low Frequency ◽  
Dual Band ◽  
Single Frequency ◽  
Antenna Structure ◽  
Rfid Tag ◽  
Small Form ◽  
Dual Band Antenna ◽  
Miniaturized Antenna ◽  
Small Form Factor

Abstract A miniaturized antenna is required for a small form factor RFID tag. For harmonic RFID tag, the tag should be capable of receiving and transmitting at two different frequencies (fundamental and harmonic). Implementation of two different antennas for the operation would increase the footprint of the antenna. Hence, an optimized antenna structure is proposed, which will have a small form factor while maintaining a considerable gain. The dual band antenna would be capable of receiving at fundamental frequency and transmit information at harmonic frequency while maintaining small tag size. The dual band antenna has a miniaturized rectangular board dimension of 96.5 mm and 81 mm with resonance at 434 MHz at low frequency and 860 MHz to 1000 MHz at high frequency. The harmonic tag was designed with nonlinear transmission line and the dual band antenna. The harmonic RF tag would be useful for numerous RF applications where the single frequency tags will not be a good option such as underground object tagging, tag detection in an industrial set up with strong reflectors such a metal in the vicinity. In this paper, the design, fabrication and characterization of dual band harmonic RFID tag antenna is presented.

Dual-band slot microstrip patch antennas with dual-radiation modes for wireless communication

2019 ◽  
Vol 12 (2) ◽  
pp. 155-162
Author(s):  
Guangwei Yang ◽  
Jianying Li ◽  
Jiangjun Yang ◽  
Zijian Xing
Keyword(s):  
Wireless Communication ◽  
Frequency Band ◽  
High Frequency ◽  
Communication Systems ◽  
Low Frequency ◽  
Dual Band ◽  
High Frequency Band ◽  
Radiation Beam ◽  
Microstrip Patch ◽  
Dual Band Antenna

AbstractIn this paper, a novel compact dual-band microstrip patch antenna with dual-radiation modes is investigated. The proposed antenna consists of a rectangular ground plane, a U-shaped feed probe, and an H-shaped slot radiating patch. By adjusting the size of these structures, a dual-band antenna can be obtained. In the low-frequency band, the antenna can radiate one radiation beam with high gain. In the high-frequency band, the antenna can achieve monopole-like radiation pattern. Therefore, an antenna prototype is fabricated and measured for validation. Good agreement between the simulated and measured results is observed in this paper. The antenna's operating frequency ranges are 3.6–3.85 GHz in the low-frequency band and 5.1–6.1 GHz in the high-frequency band with the reflection coefficient less than −10 dB. At 3.7 GHz, the antenna radiate one beam with 8.8 dBi realized gain. At 5.5 GHz, it exhibits dual-radiation beams directed to −48 and 48° with 5.6 and 5.5 dBi realized gain in the xoz-plane and −48 and 48° with 2.9 and 3.0 dBi realized gain in the yoz-plane. Therefore, the proposed antenna is a good candidate for wireless communication systems.

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