A Compact Ultra-Wideband Multibeam Antenna System

2018 ◽  
Vol 66 (1) ◽  
pp. 125-131 ◽  
Author(s):  
Ahmad Emadeddin ◽  
Mohammad Ali Salari ◽  
Mahdi Zoghi ◽  
Amin Darvazehban ◽  
Omid Manoochehri
Keyword(s):  
Antenna System ◽  
Ultra Wideband ◽  
Multibeam Antenna

Cuboidal quad-port UWB-MIMO antenna with WLAN rejection using spiral EBG structures

2021 ◽  
pp. 1-8
Author(s):  
Sumon Modak ◽  
Taimoor Khan
Keyword(s):  
Close Agreement ◽  
Ground Plane ◽  
Antenna System ◽  
Ultra Wideband ◽  
Electromagnetic Bandgap ◽  
Mimo Antenna ◽  
Simulated Performance ◽  
Notched Band ◽  
Multiple Input ◽  
Band Characteristic

Abstract This study presents a novel configuration of a cuboidal quad-port ultra-wideband multiple-input and multiple-output antenna with WLAN rejection characteristics. The designed antenna consists of four F-shaped elements backed by a partial ground plane. A 50 Ω microstrip line is used to feed the proposed structure. The geometry of the suggested antenna exhibits an overall size of 23 × 23 × 19 mm3, and the antenna produces an operational bandwidth of 7.6 GHz (3.1–10.7 GHz). The notched band characteristic at 5.4 GHz is accomplished by loading a pair of spiral electromagnetic bandgap structures over the ground plane. Besides this, other diversity features such as envelope correlation coefficient, and diversity gain are also evaluated. Furthermore, the proposed antenna system provides an isolation of −15 dB without using any decoupling structure. Therefore, to validate the reported design, a prototype is fabricated and characterized. The overall simulated performance is observed in very close agreement with it's measured counterpart.

Pattern-forming circuit for an ultra-wideband multibeam antenna array

2011 ◽  
Vol 53 (9) ◽  
pp. 881-886 ◽  
Author(s):  
Yu. I. Buyanov ◽  
V. I. Koshelev ◽  
P. F. Shvadlenko
Keyword(s):  
Antenna Array ◽  
Ultra Wideband ◽  
Multibeam Antenna ◽  
Pattern Forming

scholarly journals Dual Port Antenna Combining Sensing and Communication Tasks for Cognitive Radio

2016 ◽  
Vol 62 (2) ◽  
pp. 121-127 ◽  
Author(s):  
Hamza Nachouane ◽  
Abdellah Najid ◽  
Abdelwahed Tribak ◽  
Fatima Riouch
Keyword(s):  
Cognitive Radio ◽  
Dynamic Spectrum Access ◽  
Antenna System ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Manufacturing Cost ◽  
Communication Task ◽  
Wide Range ◽  
Radio Technology ◽  
Radio Systems

Abstract Dynamic spectrum access has been proposed as the effective solution to overcome the spectrum scarcity issue, supported by cognitive radio technology. Sensing and communication functions are both the most important tasks in cognitive radio systems. In this paper, an antenna system combining sensing and communication tasks is proposed to be integrated into cognitive radio front-ends. The sensing task is performed by means of an ultra-wideband quasi-omnidirectional antenna. Whilst the communication task is ensured by using a narrowband antenna. Both antennas have been designed on the same layer of an FR4 substrate, for manufacturing cost constraint. Therefore, the isolation between them must take into consideration. The measured mutual coupling of less than -18 dB is achieved over the whole impedance bandwidth. The proposed sensing antenna covers a wide range frequency bands ranging from 2 to 5.5 GHz. While the communication antenna operates at 2.8 GHz, and by adding inductors to the antenna, the resonant frequency can be tuned from 2.6 to 2.7 GHz. The whole antenna system was designed, fabricated, and tested. Measurement and simulation results prove the feasibility of the proposed structure for cognitive radio applications.

Matrix Analysis and Pulse Transmission of Antenna Array for MIMO UWB Systems

2011 ◽  
Vol 57 (1) ◽  
pp. 91-96
Author(s):  
Giennadij Czawka ◽  
Marek Garbaruk
Keyword(s):  
Antenna Array ◽  
Communication Systems ◽  
Signal Transmission ◽  
Antenna System ◽  
Ultra Wideband ◽  
Matrix Analysis ◽  
Planar Antennas ◽  
Antenna Structure ◽  
Mimo Antenna ◽  
Pulse Transmission

Matrix Analysis and Pulse Transmission of Antenna Array for MIMO UWB Systems This paper presents a theoretical matrix analysis of antenna structure consisting of two double-element planar antennas for ultra-wideband (UWB) application in 2*2 MIMO indoor communication systems. The structure and characteristics of pla-nar two-element UWB antenna are presented. Two matrix models of MIMO antenna system are represented in the paper. A stan-dard MIMO signal transmission matrix without taking into con-sideration the coupling between antennas is described. A new ap-proach to a full electromagnetic analysis based on the scattering matrix of the MIMO spatial antenna array is proposed. Func-tional power parameters for the whole MIMO UWB transmit-receive antenna structure are introduced. Results of computer si-mulations of different matrices describing a MIMO antenna sys-tem and the transmission propagation pulses are presented.

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