Wide band profiled slotline antennas.

Çapar, Muzaffer


Wideband long wave infrared metamaterial absorbers based on silicon nitride
ÜSTÜN, Kadir; Sayan, Gönül (2016-11-28)
In this paper, we present silicon nitride metamaterial absorber designs that accomplish large bandwidth and high absorption in the long wave infrared (LWIR) region. These designs are based on the metal-insulator-metal topology, insulator (silicon nitride), and the top metal (aluminum) layers are optimized to obtain high absorptance values in large bandwidths, for three different silicon nitride based absorber structures. The absorption spectrum of the final design reaches absorptance values above 90% in the...
Broad band metamaterial absorber based on wheel resonators with lumped elements for microwave energy harvesting
KARAASLAN, MUHARREM; BAĞMANCI, MEHMET; ÜNAL, EMİN; AKGÖL, OĞUZHAN; ALTINTAŞ, OLCAY; Sabah, Cumali (Springer Science and Business Media LLC, 2018-05-01)
A new metamaterial absorber structure is designed and characterized both numerically and experimentally for microwave energy harvesting applications. The proposed structure includes four wheel resonators with different dimensions, from which the overall response of the structure can then be obtained by summing all the overlapping frequency responses corresponding to each dimension. The essential operation frequency range of the wheels is selected in such a way that the energy used in wireless communications...
Wideband Quarter Wave Transformer Based on Defected Ground and Split Ring Resonator Structures
Yuksek, Yahya; Nesimoglu, Tayfun (2018-11-02)
This article examines a wideband impedance transformer based on a split ring resonator and defected ground structures. The transformer was designed as a 4 section binomial one and it provides a transformation from 50 SI to 100 Omega. Reversed "Z" shaped defects are formed on the ground plane of the design in order to increase the bandwidth. The design has been simulated using a 3D electromagnetic simulator which utilizes finite integration technique. Three distinct resonances are exhibited at specific frequ...
Wideband phase shifter for 6-18 Ghz applications
Boyacıoğlu, Gökhan; Demir, Şimşek; Department of Electrical and Electronics Engineering (2010)
Phase shifters are common microwave circuit devices, which are widely used in telecommunication and radar applications, microwave measurement systems, and many other industrial applications. They are key circuits of T/R modules and are used to form the main beam of the electronically scanned phase array antennas. Wideband operating range is an important criterion for EW applications. Hence, wideband performance of the phase shifter is also important. In this study, four wideband phase shifter circuits are d...
Wide Bandwidth Absorption in the MWIR Region using a Thin and Simple Metamaterial Absorber
ÜSTÜN, KADİR; Sayan, Gönül (2017-09-27)
In this study, metamaterial absorber structures that operate in the mid-wave infrared (MWIR) region are presented. The advantage of the design stems from the high absorptance in the region of interest and the ease of fabrication. Fabrication stage is facilitated by large in-plane geometric dimensions of the metamaterial pattern and small thickness of the full absorber geometry.
Citation Formats
M. Çapar, “Wide band profiled slotline antennas.,” Middle East Technical University, 1986.