Modal Properties of a Beam Carrying OAM Generated by a Circular Array of Multiple Ring-Resonator Emitters

2021 ◽  
Author(s):  
Huibin Zhou ◽  
Hao Song ◽  
Zhe Zhao ◽  
Runzhou Zhang ◽  
Haoqian Song ◽  
...  
Keyword(s):  
Ring Resonator ◽  
Circular Array ◽  
Modal Properties ◽  
Multiple Ring

Modal Properties of a Beam Carrying OAM Generated by a Circular Array of Multiple Ring-Resonator Emitters

2020 ◽  
Author(s):  
Huibin Zhou ◽  
Hao Song ◽  
Zhe Zhao ◽  
Runzhou Zhang ◽  
Haoqian Song ◽  
...  
Keyword(s):  
Ring Resonator ◽  
Circular Array ◽  
Modal Properties ◽  
Multiple Ring

scholarly journals A Novel Ultrawideband Gear-Shaped Dielectric Ring Resonator Antenna

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Mehdi Ghorbani ◽  
Habib Ghorbaninejad
Keyword(s):  
Dielectric Resonator ◽  
Ring Resonator ◽  
Ground Plane ◽  
Array Antenna ◽  
Impedance Bandwidth ◽  
Circular Array ◽  
Dielectric Resonator Antennas ◽  
Resonator Structure ◽  
Quarter Wave ◽  
Design Characteristics

In this study, a novel ultrawideband (UWB) dielectric ring resonator (DRR) antenna has been proposed. DRR antennas include a single monopole antenna in the center of a ground plane and a dielectric with a symmetric structure around the monopole. This structure will lead to ultrawide band antenna. However, it is still possible to enhance the antenna bandwidth. In this study, we combine the DRR structure with an array antenna. The proposed antenna includes a circular array of four triangle resonators, which is rotated around the center of the triangle base to form a gear-shaped ring resonator antenna. In this design, characteristics of all these antennas are combined to enhance the antenna bandwidth including triangular dielectric resonator, circular array antenna, dielectric ring resonator structure, and a quarter-wave electric monopole. Triangular dielectric resonator antennas are wideband and in small size. Ring resonator antennas are inherently ultrawideband. Quarter-wave electric monopole and circular array structure can also enhance antenna bandwidth. This novel shape of the DRR antenna possesses the wider impedance bandwidth compared to similar works. Impedance bandwidth is 150% (5.2–36.1 GHz), and the bandwidth ratio is 1 : 6.9, which is much greater than earlier reports.

scholarly journals Multiple-ring Circular Array for Ground-Penetrating Radar Applications: Basic Ideas and Preliminary Results

2017 ◽  
pp. 25-29
Author(s):  
Roberto Vescovo ◽  
Lara Pajewski
Keyword(s):  
Antenna Array ◽  
Ground Penetrating Radar ◽  
Dynamic Range ◽  
Circular Array ◽  
Radar Systems ◽  
Radar Applications ◽  
Basic Ideas ◽  
Ground Penetrating ◽  
Low Dynamic Range ◽  
Multiple Ring

In this paper, the possibility of using a multiple-ring circular array as an antenna array for Ground-Pene-trating Radar systems is investigated. The theory behind theproposed idea is presented. The preliminary numerical re-sults that are obtained suggest that the proposed congura-tion is promising. It allows achieving a wide frequency bandand low dynamic range ratio of excitations, thus simplifyingthe feeding network. Further interesting requirements maybe satised by exploiting a combination of deterministic andstochastic synthesis techniques to design the array.

Synthesis of multiple-ring-resonator filters for optical systems

1995 ◽  
Vol 7 (12) ◽  
pp. 1447-1449 ◽  
Author(s):  
R. Orta ◽  
P. Savi ◽  
R. Tascone ◽  
D. Trinchero
Keyword(s):  
Ring Resonator ◽  
Optical Systems ◽  
Multiple Ring ◽  
Resonator Filters
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