behnam dorostkar

In military science, the use of telecommunication technologies is very important because of receiving enemy information from a distance, and the artificial aperture radar system is an imaging radar that has a high detection and separation ability. According to the nature of formation of artificial aperture radar images, the presence of speckle noise is the most important factor in destroying the quality of these images and making a decision error.

Therefore, it is very important to have a pre-processing stage in order to reveal and identify the data and reduce the spot noise. The main goal is to provide a powerful algorithm based on artificial intelligence to improve the detection of SAR radar ground targets with object detection algorithms that are obtained through airplanes or satellites in order to monitor ground targets.

Analysis: 

In the pre-processing stage, after reducing the effect of speckle noise on SAR radar images, the proposed model is investigated to improve the detection of SAR radar ground targets with the help of Lee filter.

by using YOLO and RCNN algorithms, the RCNN algorithm has a better performance in detecting denoised MSTAR images with an average accuracy of 99.84% compared to YOLO with an average accuracy of 90.424%, but in detecting noisy MSTAR images, the YOLO method With an average accuracy of 80.875%, compared to the RCNN method with an average accuracy of 61.49%, it has a better performance for identifying and improving images and increasing the reliability of the system.

In this paper, a small dual-port antenna with ultra-wideband application for electronic warfare applications is introduced. This antenna is of the monopole type and has U-shaped sections on the patch and an incomplete ground plane that controls the radiation between the two ports using a stop band to provide impedance matching over a wider bandwidth (from 4 to 12.1 GHz). to be This UWB monopole antenna is reconstructed horizontally with less than a quarter-wavelength spacing at 4 GHz to create a UWB multiple input and output (MIMO) antenna with dimensions of 25 x 38 x 1.6 mm3. In the UWB MIMO antenna, the antenna performance is improved by placing a rectangular patch with a U-shaped slot and variations in the ground surface. The modified ground plate also acts as an isolation structure, providing isolation below 21 dB at the operating frequency of 13.5-5 GHz. Also, the simulation in HFSS simulation software is designed in opposite way.

In this paper a interference-resistant ultra-wide-band low noise amplifier is presented in frequency range of 3.1-10.6 GHz for high data rate wireless communication and radio receiver. Second and third order input intercept point (IIP2 and IIP3) are enhanced in the novel circuit by new circuit structure and by adopting the Improved Complementary Derivative Superposition (ICDS), Forward Body Bias (FBB)and resistive feedback. The proposed LNA uses low pass filter and common source topology as wide-band input matching. Utilizing FBB technique reduce the threshold voltage and hence lower power consumption is achieved. The post-layout simulation of the proposed LNA in a 180 nm RF CMOS process show S11 less than - 10 dB in the entire band. Minimum of noise figure is 2.6 dB, power gain is about 11 dB, maximum of IIP3 and of IIP2 are 3.61 dB and 31.11 dB, respectively. The chip area is 734 mm ×870 mm. The DC power consumption is only 7.4 mW with 1.2V DC supply.

Regarding the recent developments in electronics and increasing use of electronic equipment by fifth generation (5G) networks, the possibility of charging these equipment without mechanical connections such as wire, has attracted much attention. Wireless Power Transmission (WPT) Systems are proposed as a proper way in this regard and can be used in various medical, telecommunication and military fields. The internet of things (IoT), as one of the transformational services in these fields, requires the use of WPT technology to reduce the number of cables, reduce environmental pollution and increase user satisfaction. In this paper, it is attempting to introduce a wireless power transfer system and Internet of Things, and review the latest research on the use of WPT equipment with Internet of Things infrastructure, as well as the charging of IoT devices with the WPT system. Recently, the Simultaneous Wireless Information and Power Transfer (SWIPT) for internet of things sensor networks, havebeen considered bymany engineers.