In this study, we present the implementation of invasive weed optimization (IWO) in the maximization of main-lobe to side-lobe level for the non-uniform planar antenna array. The antenna arrays investigated in this study are generated using the chaos game algorithm (CGA) and shaped into selected fractal geometries chosen on the basis of their interesting performance. This CGA is picked out in orde

The impedance dependence of resonant tunneling diodes (RTDs) based on the GaAs/AlAs heterosystem is investigated in the range of 0.1?40 GHz. The analysis shows that the impedance of about 90% of unbiased RTDs is well described by an equivalent circuit (EC) consisting of parallel-connected resistance and capacitance and an additional resistance connected in series with this parallel combination. Wh

A 35 GHz High Isolation RF MEMS SPDT Switch Ilker Comart, Ça ri Çetintepe, Sim¸ek Demir and Tayfun Akin g ¸ s ODTÜ Üniversiteler Mah. Dumlupinar Blv. No:1, Elektrik ve Elektronik Mühendisli i D-305, 06800 Çankaya g Ankara/TURKEY Abstract--This paper presents an RF MEMS based SPDT (single pole double throw) switch, which is tuned to 35 GHz operating frequency. Designed device will soon be under fa

Combined Liquid Crystal and MEMS Phase Shifter: Preliminary Measurement Results Institute for Microwave Engineering and Photonics, Technische Universit¨ t Darmstadt, a Merckstrasse 25, 64283 Darmstadt, Germany 2 Fondazione Bruno Kessler FBK, Via Sommarive 18, I-38123 Povo Trento, Italy 3 Dept. of Electronic and Information Engineering, Via G. Duranti 93, I-06125 Perugia, Italy 1 Carsten Fritzsch1

77 GHz MEMS based phased array antenna integrated receiver Efe Ozturk1, Mehdi Seyyed-Esfahlan1, Mehmet Kaynak2, and Ibrahim Tekin1 2 Sabanci University, Electronics Engineering, 34956 Istanbul, TURKEY Technology/Process Integration IHP GmbH, 15236 Frankfurt, Germany dB). To increase the received signal level at the receiver, one can use conventional antenna technologies such as high gain phased a

RF MEMS for Radar and Electronic Warfare Applications Sebnem Sayginer ASELSAN A.S., Radar Electronic Warfare and Intelligent Systems Group, Ankara, Turkey, Tel: +90 (312) 592 25 69 Abstract-- Standard RF MEMS switch technology suffered from reliability issues for a long time and still do, even though there are now a few examples of RF MEMS switch products that are available for purchase. Potential

Intelligent Antenna Systems, Applications and Enabling Technologies Bedri A. Çetiner1 and Necmi Biyikli2 1 Utah State University, Department of Electrical and Computer Engineering, Logan, UT, USA 2 Bilkent University, UNAM, Ankara, TÜRKYE Abstract -- This paper provides a review on previously studied various multifunctional reconfigurable antenna (MRA) designs along with the technologies used to

RF-MEMS chip capping by dry film epoxy polymer Flavio Giacomozzi1, Sabrina Colpo1, Alessandro Faes1 , Guido Sordo1, Stefano Girardi1, Paola Farinelli2 2 Fondazione Bruno Kessler (FBK), MEMS group, Trento, Italy University of Perugia, Dept. of Electronic and Information Engineering, Via G. Duranti, 93 - I-06125 Perugia ­ Italy 1 Abstract -- This work reports on RF MEMS chip capping to protect se