DESIGN AND FABRICATION OF Ka-BAND BROADBAND COMBINED POWER AMPLIFIER BASED ON FLEXIBLE SUBSTRATE INTEGRATED WAVEGUIDE TECHNOLOGY

Analysis of infrared radiation characteristics and detection technology of near-space hypersonic vehicles

“…However, the shock wave radiation is more applicable to the detection of ultraviolet or other wave bands, and the radiation intensity of the infrared wave band is several orders of magnitude lower than the radiation intensity of the missile body [5] , and is less than the background radiation brightness in the presence of sunlight by analyzing the research results of infrared radiation of each component of the NSHT in the near space [9] . Therefore, the influence of the flow field can be neglected in the calculation of the infrared radiation characteristics of the target [10] , that is, the infrared radiation characteristics of NSHT in the near space can be generally expressed as the body radiation (HGV in gliding section) or the superposition of the body radiation and the wake flame characteristic radiation (HCV in cruise section) [11] .…”

On-Chip Temperature Compensation for Small-Signal Gain Variation Reduction

“…The millimeter-wave band has received much attention because of the abundant and unexplored spectrum resources. A PA is a key module of a millimeter-wave wireless communication system [ 1 , 2 , 3 ], and its performance directly determines the quality of a wireless communication system. Millimeter-wave communication systems, for example, wireless communication [ 4 , 5 , 6 , 7 ], radars [ 8 , 9 , 10 ], satellites [ 11 , 12 ], and navigation [ 13 ], usually operate in outdoor or extremely harsh places with significant temperature variations, and the specifications of PAs are closely related to the temperature variation.…”