![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/profile/Pavlos-Lazaridis/publication/330104723/figure/fig1/AS:710891079221252@1546501049916/Geometry-of-the-proposed-Dolph-Chebyshev-feeding-network_Q320.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://i1.rgstatic.net/ii/profile.image/322077653962754-1453800704603_Q128/Bo-Liu-95.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/profile/Pavlos-Lazaridis/publication/336512594/figure/fig1/AS:819379935662080@1572366808085/CST-model-of-the-proposed-antenna-array_Q320.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/profile/Pavlos-Lazaridis/publication/325495658/figure/fig1/AS:653649030164480@1532853481511/Geometry-of-LTE-protected-LPDA_Q320.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/profile/Pavlos-Lazaridis/publication/331559007/figure/fig2/AS:733555026059267@1551904555935/Normalized-radiation-patterns-produced-respectively-by-the-conventional-MVDR-technique_Q320.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/publication/341454493/figure/fig3/AS:892519172800518@1589804561654/S-parameters-of-the-array-elements-All-S-parameters-are-21-dB-at-698-MHz-DVB-T_Q320.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/profile/Ioannis-Gravas/publication/355070717/figure/fig4/AS:1076742458474497@1633726815030/Microstrip-line_Q320.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/profile/Pavlos-Lazaridis/publication/331559007/figure/fig1/AS:733555026046983@1551904555904/Normalized-radiation-patterns-produced-respectively-by-the-conventional-MVDR-technique_Q320.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/publication/341454493/figure/fig2/AS:892519172825088@1589804561619/Normalized-radiation-pattern-versus-elevation-angle-th-at-azimuth-angle-ph-0-The-maximum_Q320.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/profile/Ioannis-Gravas/publication/345319463/figure/fig3/AS:954422913945604@1604563563526/Relative-characteristic-impedance-of-a-feeder-line-as-a-function-of-relative_Q320.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/profile/Ioannis-Gravas/publication/345319463/figure/fig2/AS:954422913933316@1604563563491/Constant-directivity-contour-curves_Q320.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://i1.rgstatic.net/ii/profile.image/878943494213632-1586567867163_Q128/Cherie-Chen-2.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://i1.rgstatic.net/ii/profile.image/762091036221445-1558708070519_Q128/Anastasios-Stamoulakatos.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/profile/Ioannis-Gravas/publication/345319463/figure/fig4/AS:954422913937410@1604563563598/Ackley-2D-graph_Q320.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/publication/341454493/figure/fig1/AS:892519172800517@1589804561581/Flowchart-of-the-optimization-procedure_Q320.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://i1.rgstatic.net/ii/profile.image/753388518137856-1556633228090_Q128/Muhammad-Abdullah-24.jpg)
Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications
![Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications Ioannis GRAVAS | PhD Student | PhD on wireless communications, MEng/ECE | Aristotle University of Thessaloniki, Thessaloníki | AUTH | Electrical and Computer Engineering/Division of Telecommunications](https://www.researchgate.net/profile/Pavlos-Lazaridis/publication/331559007/figure/fig3/AS:733555026051074@1551904555962/Normalized-radiation-patterns-produced-respectively-by-the-conventional-MVDR-technique_Q320.jpg)