Wideband offset slot-coupled patch antenna array for X/Ku-band multimode radars

Bilgic, M.M. | Yegin, K.

Article | 2014 | IEEE Antennas and Wireless Propagation Letters13 , pp.157 - 160

A high-gain, wideband antenna element that covers most portions of X-and Ku-bands is essential for multimode radar applications. This letter presents an aperture-coupled stacked patch antenna for 8.75-12.25-GHz frequency band. Fixed beam tilt up to 30^ in scan range can be obtained by offsetting the aperture relative to a driven patch. When there is no offset, a single antenna has broadside gain greater than 10 dBi. An antenna array (4×,4) with fixed beam tilt is designed and validated with measurements. The prototype antenna exhibits 44% fractional bandwidth and maximum gain 20.6 dBi in the target frequency band. © 2014 IEEE.

Low profile wideband antenna array with hybrid microstrip and waveguide feed network for Ku band satellite reception systems

Bilgic, M.M. | Yegin, K.

Article | 2014 | IEEE Transactions on Antennas and Propagation62 ( 4 ) , pp.2258 - 2263

Wideband, planar and low profile antenna array is proposed and designed for Ku band direct broadcast from satellite reception for mobile systems. Contrary to earlier designs, the array antenna covers entire downlink Ku-band frequencies (10.8-12.75 GHz) for simultaneous reception from multiple transponders. The array antenna exhibits 16.5% bandwidth and has 30 dBi average gain for both vertical and horizontal polarizations. To achieve high efficiency, hybrid waveguide microstrip feed network is proposed. H-plane waveguide T-junctions with reduced waveguide height and disk loaded coaxial probe for microstrip to waveguide transition ar . . .e designed. Loss in the array is formulated as an optimization problem and it is minimized for subarray and array configuration. Overall height of the planar antenna with waveguide feed network is under 25 mm. The antenna is built and tested for reception quality. Carrier-to-noise ratio of 9.5 dB was observed for the target transponder (42°E) at 11.9 GHz using IF loop-out of the receiver. © 1963-2012 IEEE Daha fazlası Daha az

TPMS receive antenna design for large vehicles

Özdemirli, A. | Bilgic, M.M. | Yegin, K.

Conference Object | 2011 | 2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011 , pp.2258 - 2263

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.

Wideband high-gain aperture coupled antenna for ku band phased-array systems

Bilgic, M.M. | Yegin, K.

Article | 2013 | Microwave and Optical Technology Letters55 ( 6 ) , pp.1291 - 1295

Aperture coupled microstrip antenna is presented for Ku band phased-array applications. We show that radial open circuit terminated microstrip feed and hourglass aperture shape provide better coupling, high gain, wide bandwidth and small in-band gain variation. Eight-element antenna array with fixed beam tilt is formed and measured to validate simulations. Copyright © 2013 Wiley Periodicals, Inc.

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