چکیده مقاله
Active integrated antennas are used especially for millimeter wave scale systems, because these antennas are considered as effective solutions to the basic problems at these frequencies, which include higher levels of loss in the transmission line, limited power source, low antenna efficiency and a lack of having high performance phase switches Moreover, increasing the effective length of small antennas, having higher antenna bandwidth, reducing the cross link between array elements and improving noise number are some of the benefits of active antennas One of the most important challenges that these confront which the requirement can be adequately optimized is the Carrier to Interference Ratio C/I These existing interferences are due to sub petals, polarization, lateral channel and intermodulation interferences In this research, the effects of nonlinearization of amplifiers on the phased array pattern in microstrip antennas are investigated in elaborations The most dangerous nonlinear effect in an active arrays of a multifactorial system is that the intermodulation components produced by the behavior of the nonlinear amplifier must be studied in advance This phenomenon is most often occurring in active transmitter arrays However, many of these results can also be used for receiver arrays First, a transistor made by Motorola was selected, and then adaptation circuits for this transistor as well as microstrip antenna designed at 2GHz, respectively added to the set, and an active 9W transmitter antenna was designed The designed amplifier was then analyzed nonlinearly and used to model the behavior of the transistor Finally, different patterns of the array were examined and a 1×15 array was excited with a uniform distribution Based on our results, the nonlinearity of the amplifier has little effect on the radiation pattern of the antenna Even though, it creates a pattern of intermodulation components, the frequency dependent Bessel series model should be used in the case of broadband antenna design
کلیدواژهها
نویسندگان
Fatemeh Sharifi
Department of Electrical Engineering, University of Applied Science and Technology, Bushehr, Iran
Iman Bagheri
Department of Biomedical Engineering, Imam Reza International University, Mashhad, Iran
Saeid Alizadeh
Department of Electrical Engineering, Montazeri Technical and Vocational University, Mashhad, Iran
Maryam Baneshi
Department of Electrical Engineering, Islamic Azad University, Kazerun, Iran
شیوه ارجاع
Sharifi, Fatemeh and Bagheri, Iman and Alizadeh, Saeid and Baneshi, Maryam,1400,Design and Simulation of Microstrip Antenna for Phased Array and Analyzing Nonlinear Effect of Amplifier on Array Pattern,8th National Congress of Electrical and Computer Engineering of Iran,Tehran
ارائهشده در
مجموعه مقالات هشتمین کنگره ملی تازه های مهندسی برق و کامپیوتر ایران28 بهمن 1400 · تهران