scholarly journals Directional cloverleaf antenna for unmanned aerial vehicle (UAV) application

2019 ◽  
Vol 14 (2) ◽  
pp. 773 ◽  
Author(s):  
M.S. Safaron ◽  
H.A. Majid ◽  
B.A.F. Esmail ◽  
A.S.Ab. Ghafar ◽  
F.A. Safarudin ◽  
...  
Keyword(s):  
Radiation Pattern ◽  
Unmanned Aerial Vehicle ◽  
High Gain ◽  
Radiation Patterns ◽  
Average Gain ◽  
Directional Radiation ◽  
Aerial Vehicle

3-blade and 4-blade cloverleaf antennas operating at 2.45 GHz have been proposed. In order to achieve directional radiation pattern and high gain, reflector is incorporated to the proposed antennas. The proposed antennas have an average gain of 2.37 dBi while the proposed antennas with reflector have an average gain of 6.38 dBi. The dimension of the proposed antenna is compact enough to be mounted on an unmanned aerial vehicle (UAV). Simulated and measured results are used to demonstrate the performance of the antenna. The simulated and measured return losses, together with the simulated radiation patterns, are presented and compared.

scholarly journals Ultrawideband Low-Profile and Miniaturized Spoof Plasmonic Vivaldi Antenna for Base Station

2020 ◽  
Vol 10 (7) ◽  
pp. 2429 ◽  
Author(s):  
Li Hui Dai ◽  
Chong Tan ◽  
Yong Jin Zhou
Keyword(s):  
Radiation Pattern ◽  
Frequency Band ◽  
High Gain ◽  
Base Station ◽  
Ultra Wideband ◽  
Radiation Patterns ◽  
Low Profile ◽  
Simulation Results ◽  
Vivaldi Antenna ◽  
Good Agreement

Stable radiation pattern, high gain, and miniaturization are necessary for the ultra-wideband antennas in the 2G/3G/4G/5G base station applications. Here, an ultrawideband and miniaturized spoof plasmonic antipodal Vivaldi antenna (AVA) is proposed, which is composed of the AVA and the loaded periodic grooves. The designed operating frequency band is from 1.8 GHz to 6 GHz, and the average gain is 7.24 dBi. Furthermore, the measured results show that the radiation patterns of the plasmonic AVA are stable. The measured results are in good agreement with the simulation results.

scholarly journals Proposal of a Planar Directional UWB Antenna for Any Desired Operational Bandwidth

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Marco A. Peyrot-Solís ◽  
Giselle M. Galvan-Tejada ◽  
Hildeberto Jardon-Aguilar
Keyword(s):  
Reflection Coefficient ◽  
Radiation Pattern ◽  
Cutoff Frequency ◽  
Simple Equation ◽  
Antenna Design ◽  
Uwb Antenna ◽  
Average Gain ◽  
Directional Radiation ◽  
Elliptic Cone ◽  
Lower Cutoff

A novel planar directional UWB antenna is proposed. The antenna design evolves from an oblique elliptic cone antenna by applying the planar-solid correspondence to two axes. Through a simple equation, this antenna can be designed, to operate at a specific lower cutoff frequency with a bandwidth larger than 10 GHz for a reflection coefficient magnitude lower than −10 dB. This characteristic provides the antenna with a good versatility. The directional radiation pattern has an average gain of 6 dBi.

scholarly journals Switch-Beam Vivaldi Array Antenna Based On 4x4 Butler Matrix for mmWave

2018 ◽  
Vol 218 ◽  
pp. 03011
Author(s):  
Nurlaila Safitri ◽  
Rina Pudji Astuti ◽  
Bambang Setia Nugroho
Keyword(s):  
Radiation Pattern ◽  
Single Layer ◽  
High Gain ◽  
Array Antenna ◽  
Low Loss ◽  
Butler Matrix ◽  
Directional Radiation ◽  
Phase Setting ◽  
Vivaldi Antenna ◽  
Fixed Beam

It will be diffcult to use either omnidirectional or fixed beam antenna due to the high propagation losses caused by atmospheric absorption at mmWave for 5G mobile communication. Several studies have been conducted recently using butler matrix which is part of switchable antenna with some advantages such as simple, minimal cost, low loss, etc. Previous studies also have designed vivaldi array antenna at 28 GHz which provides a fix beam directional radiation pattern with narrow beam that requires real phase setting. However, there has been no research using vivaldi antenna with butler matrix, whereas it has some advantages such as wide bandwidth, high gain, high directivity, etc. This paper proposed 4x4 butler matrix integrated with vivaldi antenna by using phase shift of 45 . The design is developed on a single layer of Rogers RT5880 with dielectric constant 2.2 and thickness 0.254 mm. Best results of simulation were picked for overall system at 28 GHz, and the results of antenna as follows: the return loss was below -10 dB, the realized antennas gain was 10.2 dB with unidirectional radiation pattern and bandwidth antenna of 6 GHz that covers from 25 GHz to 31 GHz. The butler matrix average phase di erent between output port are -44.106°, 137.38°, -137.66°, 43.95° with phase err°r °f 0.894°, 2.38°, 2.66°, 1.06°. Antenna array that has been given di erent phase by butler matrix is able to shift radiation pattern on the input port successively with range of beam that can be achieved equal to 185o.

scholarly journals DIPOLE ANTENNA WITH CIRCULAR RADIATION PATTERN IN THE E-PLANE FOR VALIDATION THE INTEGRITY OF THE AIRCRAFT LANDING SYSTEMS INFORMATION

2020 ◽  
Vol 20 (4) ◽  
pp. 31-43
Author(s):  
V.V. Voitovich ◽  
◽  
Yu.V. Petrash ◽  
M.M. Belousov ◽  
E.M. Yungaitis ◽  
...  
Keyword(s):  
Radiation Pattern ◽  
Unmanned Aerial Vehicle ◽  
Free Space ◽  
Horizontal Plane ◽  
Dipole Antenna ◽  
Practical Implementation ◽  
Horizontal Polarization ◽  
Aircraft Landing ◽  
Minimum Number ◽  
Aerial Vehicle

The paper presents the results of studies of an omnidirectional dipole antenna designed for installation on an unmanned aerial vehicle of the mini-UAV category. The antenna forms a cir-cular radiation pattern in the horizontal plane with horizontal polarization of the radiated field. Irregularity of the radiation pattern of the antenna under study in free space in the horizontal plane is ±0.2 dB. The antenna contains a minimum number of elements of the feeder path. It has convenient for practical implementation design

scholarly journals Design, manufacture and performance analysis of an automatic antenna tracker for an unmanned aerial vehicle (UAV)

2018 ◽  
Vol 9 (1) ◽  
pp. 32
Author(s):  
Gesang Nugroho ◽  
Dicky Dectaviansyah
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Degrees Of Freedom ◽  
High Gain ◽  
Directional Antenna ◽  
Long Distance ◽  
Omnidirectional Antenna ◽  
Maximum Range ◽  
Aerial Vehicle ◽  
Disaster Monitoring ◽  
And Performance

In conducting a disaster monitoring mission, an unmanned aerial vehicle (UAV) has to travel a long distance to cover the region that is hited by a disaster. In the monitoring mission, Air Data and Attitude Heading Reference System (ADAHRS) data are very important to always be displayed on the ground control station (GCS). Unfortunately, the area of monitoring mission is very wide, whereas the usage of an omnidirectional antenna in the disaster monitoring mission is limited to the UAV maximum range. Therefore, a high gain directional antenna is needed. However, the directional antenna has a disadvantage of always being directed to the target. To solve this problem, antenna tracker is made to track the UAV continuously so that the directional antenna can always be directed to the flying UAV. An antenna tracker using a 32-bit microcontroller and GPS with two degrees-of-freedom was developed. It is able to move 360 degrees on azimuth axis (yaw) and 90 degrees on elevation axis (pitch). Meanwhile, the directional antenna is three elements yagi type with a radiation capability of 6 dBi. By using the antenna tracker, larger UAV range was obtained and the connection between the UAV and the GCS could always be maintained with a minimum fluctuation of RSSI signal, compared to those without using antenna tracker.

scholarly journals Design of Optically Transparent Antenna with Directional Radiation Patterns

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Yuan Yao ◽  
Wanzhong Chen ◽  
Xiaodong Chen ◽  
Junsheng Yu
Keyword(s):  
Radiation Pattern ◽  
Impedance Matching ◽  
Frequency Selective Surface ◽  
Radiation Patterns ◽  
Surface Acting ◽  
Dedicated Short Range Communication ◽  
Directional Radiation ◽  
Measurement Results ◽  
Optically Transparent ◽  
Frequency Selective

An optically transparent antenna with directional radiation pattern is proposed in this paper. This antenna consists of a radiation patch above the transparent glass substrate and a frequency selective surface acting as the ground of microstrip antenna on the back of the glass. The frequency selective surface (FSS) performs well as ground in the working frequency range to achieve directional radiation pattern. A SMA connector is used to feed the antenna. The antenna can operate at the on-board dedicated short-range communication band from 5.725 GHz to 5.85 GHz. Simulations and measurements are carried out to study the antenna performances in terms of impedance matching, gain, and radiation patterns. Both of the simulation and measurement results are shown to illustrate the good performance of the proposed antenna. It is very suitable for car network communication scene.

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