Zobrazeno 1 - 10
of 114
pro vyhledávání: '"Elias A. Alwan"'
Autor:
Md Nazim Uddin, Elias A. Alwan
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-12 (2024)
Abstract A circular polarized (CP) pentaband antenna based on the aperture-in-aperture (AIA) concept is presented for CubeSat applications. This AIA consists of five different bands ranging from L-band to Ka-band. Four different antennas, each operat
Externí odkaz:
https://doaj.org/article/1eb4971e12224c71939bfd4a3cfeda57
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 4, Pp 1176-1186 (2023)
This paper presents an array thinning approach for a 25-element antenna array arranged in a $5\times5$ grid at 5.4 GHz. Our goal is to eliminate a maximum number of antenna elements with minor gain loss and hence reduce the array size, weight, cost,
Externí odkaz:
https://doaj.org/article/0bf7635c0d194f7c82e741d2af07e02e
Autor:
Matthew W. Nichols, Michail O. Anastasiadis, Malcolm E. Taaffe, Elias A. Alwan, John L. Volakis
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 4, Pp 936-946 (2023)
An ultra-wideband (UWB) phased array is presented operating from UHF to C-bands (0.14 to 5.85 GHz). This new design employs an integrated, compact tapered spline balun in conjunction with a triple-layer semi-resistive frequency selective surface (FSS
Externí odkaz:
https://doaj.org/article/2ec04ad0cc2546a79f511fc5747dbd6c
Autor:
Matthew W. Nichols, Stavros Koulouridis, Satheesh B. Venkatakrishnan, Elias A. Alwan, John L. Volakis
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 4, Pp 724-735 (2023)
A novel approach is presented and demonstrated for integrating a wideband vertically fed antenna array at Millimeter-Wave (mm-Wave) frequencies. Specifically, a novel cost-effective Antenna-In-Package (AiP) fabrication approach is presented, then a p
Externí odkaz:
https://doaj.org/article/c1395c13180b4d639b0f69a8023744dc
Publikováno v:
IEEE Journal of Microwaves, Vol 3, Iss 2, Pp 655-664 (2023)
For simultaneous transmit (Tx) and receive (Rx), it is a common practice, with monostatic full duplex (FD) systems, to use a single antenna and a circulator to provide isolation between the transmit and receive radio chains. However, most circulators
Externí odkaz:
https://doaj.org/article/91c338f587c24f3ea982ff4e3fd6e8a5
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 4, Pp 126-140 (2023)
A 3-bit beam steerable antenna array based on a microstrip line is designed and implemented at 28 GHz for millimetre-wave application. The antenna consists of an 8-element tightly stacked aperture and a switchable feeding network. The latter consists
Externí odkaz:
https://doaj.org/article/d846ea7a725f4a549951747cd0df1555
Autor:
Md Nurul A. Tarek, Elias A. Alwan
Publikováno v:
IEEE Access, Vol 10, Pp 126508-126515 (2022)
In-band full-duplex (IBFD) systems can double the spectral efficiency by enabling simultaneous transmission and reception within the same band. Key to realizing full-duplex radios is the cancellation of the self-interference (SI) that couples from th
Externí odkaz:
https://doaj.org/article/65187b9fef544eb48de2b98847ab0546
Autor:
Md Nurul Anwar Tarek, Rimon Hokayem, Sandhiya Reddy Govindarajulu, Markus H. Novak, Elias A. Alwan
Publikováno v:
IEEE Journal of Microwaves, Vol 2, Iss 3, Pp 429-441 (2022)
Wireless technology is growing at a fast rate to accommodate the expanding user demands. Currently, the radio frequency (RF) spectrum is overcrowded. Hence, it is more susceptible to signal fratricide and interference. To enhance spectrum access, in-
Externí odkaz:
https://doaj.org/article/51b2e2f37a3a4fa2aefc3e6905bd309d
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 2, Pp 110-117 (2021)
A new approach to enhance the bandwidth of Tightly Coupled Dipole Arrays (TCDA) is presented. The new design achieves the integration of a semi-resistive Frequency Selective Surface network (FSS) composed of a non-resistive low-pass FSS and two resis
Externí odkaz:
https://doaj.org/article/fcf4b498b6484b439849979890831bfe
Autor:
Alexander D. Johnson, Jingni Zhong, Matilda Livadaru, Satheesh Bojja Venkatakrishnan, Elias A. Alwan, John L. Volakis
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 2, Pp 163-169 (2021)
Within the context of modern digital phased array (DPA) radios, differential Radio Frequency (RF) front-ends provide much greater immunity to noise and distortion by suppressing second order harmonics. Recent advancements in differential RF front-end
Externí odkaz:
https://doaj.org/article/4157a42c58814e7e9186d4013afd0d9a