this thesis looked at the effect of clay and silt soil blocking the heat transfer area of the radiator and its effect on the engine coolant through the conduct of experiments and a mathematical model developed. the results indicated that the percentage area covered resulted in a proportional increase of the inlet and outlet temperatures of the coolant in the radiator. the mathematically model d...

A stacked notched rectangular microstrip patch antenna for WLAN applications has been presented in this paper. The desired band is obtained by tuning the dimensions of notches and size of the stacked driven and parasitic patches. The same aspect ratio is maintained for both the patches and their respective notches. The bandwidth and gain of this antenna is 23.6% and 7.5dBi, respectively. Antenn...

In this study, we compare the performance of three null steering techniques using uniform linear array. These techniques include Null Steering without using Phase Shifters, Null Steering by Decoupling the Real Weights and Null Steering by Decoupling the Complex Weights. The evaluation criteria of these techniques is based on the bases of different parameters i.e., null depth, main beam width, s...

This paper proposes a single circular radiator with multi-port (SRMP) antenna that can estimate the direction-of-arrival (DoA) in azimuth and elevation directions. The proposed SRMP is designed to minimize size of ultra-wideband system by using only one patch radiator. To verify feasibility, fabricated, reflection coefficient boresight gain are measured (-13.3 dB 3.4 dBi at 8 GHz). Then, observ...

This research proposes a compact indirect slot-fed wideband patch array antenna for missile seeker application. The proposed single consists of three dielectric layers radiator, an air substrate-integrated waveguide (SIW) cavity, and feeding network. rectangular is used as radiator on the first substrate layer, SIW cavity (ASIWC) employed to obtain high directivity low mutual coupling character...