Korkmaz, E. | Araz, I. | Dursun, A. | Yegin, K.
Conference Object | 2011 | 2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011
This paper discusses the design considerations of a 10 GHz helix traveling wave tube using commercial electromagnetic simulation software CST-PIC/MWS. The dispersion characteristics of the TWT have been analyzed by modeling of a single turn electron-free slice in eigenmode solver. The return loss optimization of the input-output couplers is performed by using of transient solver. The complete model has been simulated and analyzed in particle-in-cell solver and the results are presented. © 2011 IEEE.
Isenlik, T. | Bilgiç, M.M. | Yegin, K. | Çiydem, M.
Base station antenna array is designed to cover frequency range from 1710 MHz to 2170 MHz. An entirely different antenna feed structure which consists of an L-plate capacitive feed, is developed and a parasitic patch is optimized to meet target design specifications. The antenna is +/-45° dual polarization with dedicated channels for each polarization. A prototype of the antenna element is built and measured to corroborate simulation results. The antenna array for BSA is designed to have an 18 dBi system gain with a VSWR less than 1.5 over the entire frequency band. © 2011 IEEE.
Araz, I. | Dursun, A. | Demirci, E. | Korkmaz, E. | Yegin, K.
This paper presents the simulation of a vane-type magnetron using the commercial electromagnetic software Particle-in-Cell (PIC) solver in CST. The magnetron mainly consist of 18 anode vanes without strap. The resonance frequency has been selected in X band since it has a long production history enabling a ready comparison of computed and measured results. Simulation of magnetrons has been improved by changing dimensions of cavities, optimizing voltage and applied magnetic fields values. The aim of this work is to tune the operation frequency of magnetron under the constant electric field and the magnetic field between the anode and . . . cathode. © 2011 IEEE
Özdemirli, A. | Bilgic, M.M. | Yegin, K.
TPMS (Tire Pressure Monitoring System) is becoming an industry standard for driving safety and fuel efficiency. The receiving antenna for TPMS resides in the near field of the sensor antenna and this makes it very difficult to establish a reliable RF link for large vehicles. In the design of receiving antenna, it is paramount to consider the electric field distribution around the vehicle due to transmitter sensor. Through extensive large vehicle simulations, we show optimum locations for the receive antenna and we designed two candidate antennas for best reception. © 2011 IEEE.
Bilgiç, M.M. | Yegin, K. | Türkkan, T. | Şengiz, M.
Ku band reception systems for mobile platforms demand stringent requirements for the electrical and mechanical characteristics of the antenna. Limitations on height and weight for a rugged antenna design require a careful phased array antenna design. We present a new phased array antenna design capable of mechanical scanning in azimuth and electronic scanning in elevation. Non-resonant slot coupled patch antenna with a parasitic element on top is designed for wideband operation, which covers entire Ku band allocated for TV reception, and high gain. Single element, then, is formed in an array to meet target design specifications. The . . . antenna has overall 31 dBi of gain when its beam is tilted to 45° elevation. Its feed network is optimized for this particular scanning angle and wideband operation. Considering the limited dimensions of the antenna, it exhibits excellent performance in terms of match, gain, and isolation among its polarization ports. © 2011 IEEE