Simultaneous frequency and direction finding by frequency scanning wideband array

Dual-frequency reconfigurable slot dipole array with a CPW-based feed network using RF MEMS technology for X- and Ka-band applications Topalli, Kagan; Aydın Çivi, Hatice Özlem; Demir, Şimşek; Koç, Seyit Sencer; Akın, Tayfun (2007-06-15) In recent years there is a growing interest to combine various wireless applications in a single system for miniaturization purposes. A reconfigurable MEMS antenna that can operate in multi- frequencies is an appropriate way of reducing system volume. The monolithic integration of tunable MEMS components with antennas can also reduce parasitic effects, the losses, and packaging costs. Moreover an array of these types of antennas can offer solutions for the systems requiring high antenna gains. This paper pr...
Analysis and design of microstrip patch antennas with arbitrary slot shapes Şener, Göker; Alatan, Lale; Kuzuoğlu, Mustafa; Department of Electrical and Electronics Engineering (2011) A new method is proposed that provides simple and effcient design and analysis algorithm for microstrip antennas with arbitrary patch shapes. The proposed procedure uses the mutiport network model (MNM) where the antenna is considered as a cavity bounded by perfect electric conductors on the top and the bottom surfaces and perfect magnetic conductor on the side surfaces. Ports are defined along the periphery of the patch, and the impedance matrix representing the voltage induced at one port due to a current...
An Investigation of beam scanning of arrays on cylindrical, conical and spherical surfaces Takak, Yücel; Aydın Çivi, Hatice Özlem; Department of Electrical and Electronics Engineering (2015) Recently, wide angle scanning antennas are often required especially in many radar applications. It is known that planar arrays have limited scan range without beam deformation. In this study design and production steps for wide angle scanning antenna arrays conformed on cylindrical, conical and spherical surfaces that operate at X-Band are investigated. Antenna elements used in these conformal arrays are designed using full wave electromagnetic solver tool HFSS. A MATLAB code for obtaining array patterns i...
Smart Neighbor Scanning with Directional Antennas in 60 GHz Indoor Networks Olcer, Gencay Mutlu; Genc, Zulkuf; Onur, Ertan (2010-09-30) The 60 GHz technology has an immense potential to provide wireless communication at multi-gigabit rates. At 60 GHz frequency band, severe attenuation of the signals can significantly degrade communication performance. To cope with the attenuation problem, directional antennas with high directive gains can be utilized. When network nodes use directional antennas, the neighbor discovery process becomes more complicated and time consuming. To reduce the neighbor discovery time, we propose a smart neighbor scan...
Analysis and design of slotted substrate integrated waveguide antenna on cylindrical surface Bayraktar, Ömer; Aydın Çivi, Hatice Özlem; Department of Electrical and Electronics Engineering (2014) This thesis presents novel traveling wave conformal shunt slot arrays on cylindrical substrate integrated waveguide (CSIW) placed on a cylindrical surface in the circumferential direction at K-band. Mutual couplings of longitudinal slots on broad wall of CSIW are formulated and active admittance formulas of the slots are derived which are used in Elliott’s design procedure to design slotted CSIW arrays. The designs are carried out at 25 GHz using non-uniform and uniform slot separations. The non uniform slo...

Citation Formats

N. Candan, “Simultaneous frequency and direction finding by frequency scanning wideband array,” Ph.D. - Doctoral Program, Middle East Technical University, 2003.