Low-profile wideband monopole antenna for mobile and wireless monitoring applications

2016 ◽  
Vol 58 (8) ◽  
pp. 1813-1817 ◽  
Author(s):  
Bilal El Jaafari ◽  
Jean-Marie Floch
Keyword(s):  
Monopole Antenna ◽  
Wireless Monitoring ◽  
Low Profile ◽  
Monitoring Applications

An Efficient Two-Factor User Authentication Framework for Wireless Sensor Networks

2011 ◽  
Vol 147 ◽  
pp. 320-323
Author(s):  
Jing Ying Zhao ◽  
Hai Guo ◽  
Wei Wei
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
User Authentication ◽  
Mutual Authentication ◽  
Data Access ◽  
Wireless Sensor ◽  
Wireless Monitoring ◽  
Monitoring Applications ◽  
Two Factors ◽  
Core Requirements

Nowadays, Wireless sensor networks (WSNs) are appeared to be new and promising solutions for next generation real-time wireless monitoring applications. These WSNs could become a threat if suitable security is not considered before the deployment. However, if there is any loophole in security, that might opens the door to attackers and hence, endanger for the applications. So, user authentication is one of the core requirements to protect WSNs data access from the unauthorized users. In this regard, we propose an efficient two-factor user authentication for WSNs, which is based on password and smart card (two-factors). Our scheme provides mutual authentication, enables the user to choose and change their password frequently. Moreover, they provides strong protection against different kind of attacks at reasonable computation cost.

A Metamaterial based Monopole antenna for Satellite based Navigation Applications

2020 ◽  
Vol 1 (1) ◽  
pp. 10-14
Keyword(s):  
Patch Antenna ◽  
Monopole Antenna ◽  
Additional Band ◽  
Feed Line ◽  
Low Profile ◽  
Loaded Structure

A metamaterial-based monopole antenna which resonates at L (L1 and L5) and S band for the IRNSS applications is described. The antenna has a low profile and is nearly is four times smaller in size than a conventional patch antenna. The multifrequency behavior is realized using a reactively loaded structure for the monopole antenna resulting in operation at both monopole and dipole modes. The monopole resonates at S Band and the dipolar mode resonance at L5 band. The novelty of the configuration is in realizing an additional band by introducing small square slot in the loaded structure. Copper wires are used to balance the current between the two ground at the antenna and the CPW feed line. The performance of the antenna is evaluated using ANSYS HFSS.

A Metamaterial based Monopole antenna for Satellite based Navigation Applications

2020 ◽  
Vol 1 (1) ◽  
pp. 10-14
Keyword(s):  
Patch Antenna ◽  
Monopole Antenna ◽  
Additional Band ◽  
Feed Line ◽  
Low Profile ◽  
Loaded Structure

A metamaterial-based monopole antenna which resonates at L (L1 and L5) and S band for the IRNSS applications is described. The antenna has a low profile and is nearly is four times smaller in size than a conventional patch antenna. The multifrequency behavior is realized using a reactively loaded structure for the monopole antenna resulting in operation at both monopole and dipole modes. The monopole resonates at S Band and the dipolar mode resonance at L5 band. The novelty of the configuration is in realizing an additional band by introducing small square slot in the loaded structure. Copper wires are used to balance the current between the two ground at the antenna and the CPW feed line. The performance of the antenna is evaluated using ANSYS HFSS.

Broadband Antennas

2016 ◽  
pp. 27-71
Author(s):  
Zhiya Zhang ◽  
Masood Ur-Rehman ◽  
Xiaodong Yang ◽  
Erchin Serpedin ◽  
Aifeng Ren ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Patch Antenna ◽  
Monopole Antenna ◽  
Broadband Antennas ◽  
Low Profile ◽  
Bowtie Antenna

Apart from the sleeve monopole, this chapter discusses other broadband antennas as well, and the performance evaluation in terms of various measured and simulated parameters is also illustrated. This chapter will help antenna engineers get a better understanding of the antennas discussed and make a comparison with other broadband antennas. The broadband antennas that have been discussed in this chapter include: Low-profile sleeve monopole antenna, Dual-sleeve monopole antenna, Disc-conical sleeve monopole antenna, Wideband with dumbbell-shaped open sleeve antenna, Wideband unidirectional patch antenna with G-shaped strip feed, Wideband folded bowtie antenna with G-shaped strip feed and tuning stubs, Wideband bowtie antenna with inverted L-shaped coupling feed and tuning stubs.

scholarly journals Beam-Reconfigurable Multi-Antenna System with Beam-Combining Technology for UAV-to-Everything Communications

Electronics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 980
Author(s):  
Yu-Seong Choi ◽  
Jeong-Su Park ◽  
Wang-Sang Lee
Keyword(s):  
Power Distribution ◽  
Patch Antenna ◽  
Coplanar Waveguide ◽  
Antenna System ◽  
Monopole Antenna ◽  
Total Efficiency ◽  
Beam Combining ◽  
Low Profile ◽  
Side Beam ◽  
Half Power

This paper proposes a beam-reconfigurable antenna for unmanned aerial vehicles (UAVs) with wide beam coverage by applying beam-combining technology to multiple antennas with different beam patterns. The proposed multi-antenna system consists of a circular patch antenna and a low-profile printed meandered monopole antenna. For beam combining, a coplanar waveguide with ground (CPW-G) structure feeding network is proposed, and it consists of two input ports, a 90° hybrid coupler, a microstrip 90° phase delay line, and a single-pole double-throw (SPDT) switch. It performs the role of power distribution and phase adjustment, and synthesizes the broad-side beam of the monopole antenna and the end-fire beam of the patch antenna to form the directive broadside beams in four different directions. The proposed antenna system operates at 5–5.5 GHz which covers both UAV ground control frequencies (5.03–5.09 GHz) and UAV mission frequencies (5.091–5.150 GHz). The peak gain, total efficiency, and half-power beamwidth (HPBW) of the antenna system are approximately 5.8 dBi, 76%, 145° in the elevation plane, and 360° in the azimuth plane respectively. Its electrical size and weight are λ 0 × λ 0 × 0.21 λ 0 at 5.09 GHz and 19.2 g, respectively.

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