Lale Alatan

Department of Electrical and Electronics Engineering
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Enhanced Near-Field Microwave Imaging System with Polarization Diversity
Dalkilic, A.; Öktem, Sevinç Figen; Alatan, Lale (2024-03-01)
In this letter, the impact of antenna polarization configuration and polarization diversity on the imaging quality of a near-field microwave imaging system is examined. Unlike previous works, this study also develops an ef...
Closed-Form Dyadic Green’s Functions for Dipole Excitation of Planar Periodic Structures
Adanir, Suleyman; Alatan, Lale (2024-01-01)
The analysis of a single source in the vicinity of periodic structures is a very challenging task since the aperiodic source forbids a direct application of a periodic analysis method to the problem. Full wave methods addr...
Improved Isolation Between Ports of MultiMode Antenna with a Reconfigurable Pattern by Decoupling Network
Tonga, Muhammed; Alatan, Lale; Aydın Çivi, Hatice Özlem (2023-01-01)
In this study, a decoupling network is designed and implemented to a concentric circular patch with a ring antenna whose two ports are strongly coupled. The ports of the antenna are excited with phase differences to have d...
A Compact Pattern Reconfigurable Antenna with 4 Different Radiation Modes
Gök, Čaǧlar; Alatan, Lale (2023-01-01)
This letter presents the design, fabrication, and measurements of a pattern reconfigurable antenna operating at 3.3 GHz. A circular patch in the center and a ring around it are excited by two feeds to obtain broadside and ...
A Simple and Novel Planar Structure to Excite Characteristic Modes
Çevik, Ayşe Kübra; Alatan, Lale (2023-01-01)
In this paper a low-profile and novel planar excitation technique is proposed to excite characteristic modes of a patch antenna. The proposed exciter consists of a printed balun and four exciters are positioned at the midd...
A compact pattern reconfigurable antenna employing shorted quarterwave patch antennas
Çelik, Feza Turgay; Alatan, Lale; Aydın Çivi, Hatice Özlem (2022-10-01)
A Pattern Reconfigurable Multi-Mode Antenna Based on Circular Disk and Ring-Shaped Resonators
Çelik, Feza Turgay; Alatan, Lale; Aydın Çivi, Hatice Özlem (2022-07-15)
A Pattern Reconfigurable Compact Antenna Structure Based on Shorted Microstrip Patches
Çelik, Feza Turgay; Alatan, Lale; Aydın Çivi, Hatice Özlem (2022-01-01)
A compact pattern reconfigurable antenna structure is proposed. The proposed antenna structure is composed of two shorted quarter-wave microstrip patch antennas placed side by side to share a common shorting plane. Therefo...
Pattern Reconfiguration of Microstrip Antennas by Controlling Slots in Its Ground Plane
Gök, Çaǧlar; Alatan, Lale (2022-01-01)
In this work, a pattern reconfigurable antenna with improved pattern diversity is proposed. The antenna is formed by placing a circular ring around a circular microstrip patch antenna and excited by using two feeds. The in...
Conical and Broadside Beam Switching Micromachined Antenna at 26GHz
Berberoǧlu, Ali; Çelik, Feza Turgay; Görgülü, Feza; Aydın Çivi, Hatice Özlem; Alatan, Lale (2022-01-01)
A pattern switchable micromachined antenna operating at 26 GHz is proposed. The antenna consists of a microstrip circular patch and a ring antenna placed concentrically. The antenna can switch between conical and broadside...
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