scholarly journals High-Gain Planar Array of Reactively Loaded Antennas for Limited Scan Range Applications

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1376
Author(s):  
Ronis Maximidis ◽  
Diego Caratelli ◽  
Giovanni Toso ◽  
A. Bart Smolders
Keyword(s):  
Radiation Pattern ◽  
Antenna Arrays ◽  
Short Circuit ◽  
Central Element ◽  
Vertical Axis ◽  
High Gain ◽  
Antenna Element ◽  
Horizontal Distance ◽  
Array Configuration ◽  
High Gain Antenna

This paper proposes a novel high-gain antenna element that can be used in antenna arrays that only require a limited scan range. Each high-gain antenna element uses a linear sub-array of highly-coupled open-ended waveguides. The active central element of this sub-array is directly fed, while the remaining passive waveguides are reactively loaded. The loads are implemented by short-circuits positioned at various distances from the radiating aperture. The short-circuit positions control the radiation pattern properties and the scattering parameters of the array. The proposed sub-array antenna element is optimized in the presence of the adjacent elements and provides a high gain and a flat-top main lobe. The horizontal distance between the sub-array centers is large in terms of wavelengths, which leads to limited scanning capabilities in the E-plane. However, along the vertical axis, the element spacing is around 0.6 wavelength at the central frequency that is beneficial to achieve a wider scan range in the H-plane. We show that the sub-array radiation pattern sufficiently filters the grating lobes which appear in the array factor along the E-plane. To demonstrate the performance of the proposed array configuration, an array operating at 28.0 GHz is designed. The designed array supports scan angles up to ±7.5° along the E-plane and ±24.2° along the H-plane

scholarly journals High-gain cavity backed patch antenna arrays at 140 GHz based on LTCC technology

2019 ◽  
Vol 11 (08) ◽  
pp. 829-834 ◽  
Author(s):  
Zihang Qi ◽  
Xiuping Li ◽  
Jinjin Chu ◽  
Jun Xiao ◽  
Hua Zhu
Keyword(s):  
Antenna Arrays ◽  
Patch Antenna ◽  
Impedance Matching ◽  
High Gain ◽  
Ceramic Technology ◽  
Antenna Element ◽  
Maximum Gain ◽  
Gain Enhancement ◽  
High Gain Antenna ◽  
Element Array

AbstractIn this paper, high-gain cavity backed patch antenna arrays are proposed based on low temperature co-fired ceramic technology at 140 GHz. By introducing a substrate integrated cavity to the patch antenna element, the gain is enhanced by 3.3 dB. Moreover, a rectangular ring is loaded around the patch for better impedance matching and further gain enhancement. The final simulated maximum gain of the proposed antenna element is 9.8 dBi. Based on the proposed high-gain antenna element, a 4 × 4-element array and an 8 × 8- element array are presented. The 4 × 4-element array shows a measured maximum gain of 16.9 dBi with 9.5 GHz bandwidth (136.2–145.7 GHz) and the 8 × 8-element array shows a measured maximum gain of 21.8 dBi with 9.8 GHz bandwidth(136.7–146.5 GHz), respectively.

scholarly journals Wideband Dual-Polarized VHF Antenna for Space Observation Applications

Sensors ◽  
2020 ◽  
Vol 20 (15) ◽  
pp. 4351
Author(s):  
Alexandru Tatomirescu ◽  
Alina Badescu
Keyword(s):  
Radiation Pattern ◽  
Group Delay ◽  
High Gain ◽  
Antenna Element ◽  
Frequency Bandwidth ◽  
Radio Emissions ◽  
Relative Bandwidth ◽  
Pattern Stability ◽  
Dual Polarized ◽  
Delay Variation

This work presents the design for an antenna element that can be used in radio arrays for the monitoring and detecting of radio emissions from cosmic particles’ interactions in the atmosphere. For these applications, the pattern stability over frequency is the primary design goal. The proposed antenna has a high gain over a relative bandwidth of 88%, a beamwidth of 2.13 steradians, a small group delay variation and a very stable radiation pattern across the frequency bandwidth of 110 to 190 MHz. It is dual polarized and has a simple mechanical structure which is easy and inexpensive to manufacture. The measurements show that the ground has insignificant impact on the overall radiation pattern.

scholarly journals Design & development of high gain antenna arrays for CDMA 450

2011 ◽  
Author(s):  
Azhari Asrokin ◽  
Anas Abas ◽  
Rizal Helmy Basri ◽  
Norman Jamlus
Keyword(s):  
Antenna Arrays ◽  
High Gain ◽  
High Gain Antenna

SERIES FEED FAN-BEAM ANTENNA ARRAY WITH A LOW SIDELOBE LEVEL FOR POSITIONING SYSTEM

2020 ◽  
pp. 55-65
Author(s):  
Le Minh Thuy
Keyword(s):  
Antenna Array ◽  
Radiation Pattern ◽  
Amplitude Distribution ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Positioning System ◽  
Sidelobe Level ◽  
Single Antenna ◽  
Low Sidelobe

In this paper, a novel antenna array at 5GHz is presented with a low sidelobe level and wide impedance bandwidth for indoor positioning applications . The antenna array has the size of 450 ×57×0.8 mm3 with the high gain of 14.5dBi and the low SLL of -18 dB at 5GHz. The series feed using Unequal Split T-Junction is proposed with the Chebyshev-amplitude distribution to improve SLL. Besides the 1800 phase and amplitude distribution, by deploying driven elements above each single antenna element, the radiation pattern and the gain of the antenna aray are significantly improved.

Wideband and high gain antenna arrays for UAV-to-UAV and UAV-to-ground communication in flying ad-hoc networks (FANETs)

2018 ◽  
Vol 60 (5) ◽  
pp. 1164-1170 ◽  
Author(s):  
Muhammad Mustaqim ◽  
Bilal A. Khawaja ◽  
Asghar A. Razzaqi ◽  
Syed Sajjad H. Zaidi ◽  
Syed A. Jawed ◽  
...  
Keyword(s):  
Ad Hoc Networks ◽  
Antenna Arrays ◽  
Ad Hoc ◽  
High Gain ◽  
High Gain Antenna ◽  
Hoc Networks

scholarly journals High Gain Beam Steering Antenna Arrays with Low Scan Loss for mmWave Applications

2022 ◽  
Vol 72 (1) ◽  
pp. 67-72
Author(s):  
Anil Kumar Yerrola ◽  
Maifuz Ali ◽  
Ravi Kumar Arya ◽  
Lakhindar Murmu ◽  
Ashwani Kumar
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Patch Antenna ◽  
Beam Steering ◽  
High Gain ◽  
Microstrip Patch Antenna ◽  
Antenna Element ◽  
Array Design ◽  
Conformal Antenna ◽  
Microstrip Patch

In millimeter-wave (mmWave) communications, the antenna gain is a crucial parameter to overcome path loss and atmospheric attenuation. This work presents the design of two cylindrical conformal antenna arrays, made of modified rectangular microstrip patch antenna as a radiating element, working at 28 GHz for mmWave applications providing high gain and beam steering capability. The microstrip patch antenna element uses Rogers RO4232 substrate with a thickness of 0.5 mm and surface area of 5.8 mm × 5.8 mm. The individual antenna element provides a gain of 6.9 dBi with return loss bandwidth of 5.12 GHz. The first antenna array, made by using five conformal antenna elements, achieves a uniform gain of approximately 12 dBi with minimal scan loss for extensive scan angles. In the second antenna array, a dielectric superstrate using Rogers TMM (10i) was used to modify the first antenna array. It enhanced the gain to approximately 16 dBi while still maintaining low scan loss for wide angles. The proposed array design method is very robust and can be applied to any conformal surface. The mathematical equations are also provided to derive the array design, and both array designs are verified by using full-wave simulations.

scholarly journals THz CMOS On-Chip Antenna Array Using Defected Ground Structure

Electronics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 1137
Author(s):  
Changmin Lee ◽  
Jinho Jeong
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
High Performance ◽  
High Gain ◽  
Antenna Element ◽  
Cmos Process ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
On Chip Antenna ◽  
On Chip

In this paper, we design a THz CMOS on-chip patch antenna with defected ground structure (DGS) and utilize it to implement a broadband and high gain on-chip antenna array. It is verified from the simulation that the DGS not only can increase the gain and bandwidth of the antenna element, but also can increase the isolation between the antenna elements in the on-chip array. Therefore, it allows the design of the compact 1 × 2 and 2 × 2 on-chip antenna array with high gain and broad bandwidth. The element spacing and feedline structures of the antenna array are designed and optimized by the simulations. The designed antenna element, and 1 × 2 and 2 × 2 antenna arrays are fabricated in a commercial 65 nm CMOS process. In the on-wafer measurement, they exhibit an antenna gain of 3.1 dBi, 7.2 dBi, and 8.2 dBi with a bandwidth of 14.0%, 21.3%, and 28.0% for the reflection coefficient less than −10 dB, respectively, at 300 GHz. This result corresponds to very good performance compared to the reported THz CMOS on-chip antenna array. Therefore, the designed CMOS on-chip antenna element and array using DGS in this work can be effectively applied to build low-cost and high performance THz systems, because they can be fully implemented in a conventional CMOS process without requiring any additional processes or manufacturing techniques.

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